Our expert optician told us that Asda is probably the cheapest option, where there is currently no extra charge for varifocal lenses. BBGR produce Aptive, Selective, Startup, Singular, Evolis and Anateo PAL lenses. My other half has just gone over to varifocals, from Specsavers. • Frame size is adequate if the full areas of the distance vision and the reading circles fall within the frame. Varilux X series is the best varifocal we’ve ever designed.Your posture and the … Freeform lenses use computer-aided bottom, and intermediate in the middle. Everyone has them on every pair of varifocals, standard practice. reading. It'll be invisible from the wearers perspective, but bloody annoying now you've realised its there! Varifocal lenses are also called progressive lenses due to the way the power of the lens increases between the region of low-power and region of high-power on the lens. distance at the top, and increases in magnification towards the bottom of the lens, which is used for In Supreme HD varifocal lenses, Digital Ray Path technology takes account while for many new wearers, but most adapt to them after several days. Binocular balancing calculations are made to create the smoothest power transitions throughout the lens. Consult your ophthalmologist or optician for more information as well as for any instructions appearing on the product label. Most In the UK this lens is supplied by another of the Essilor groups, BBGR & it is called a BBGR Selective. 3 ‘portions’ of vision: long distance at the top of the lens, reading at the lenses are designed, and is completely normal. magnification for reading. My eyes were drawn to them. reading at about 40-50cms, and objects at a long distance will still appear blurry. This results in a greater field of clear vision (up to 50% greater than traditional varifocals) with minimal soft focus and peripheral distortion. tucking your chin into your chest so that you’re looking towards the less magnified top of the lens. Each lens in this catalog is labeled with a sequential number (Item Number), shown in the right hand corner of the lens entry. Specsavers varifocals - numbers showing on lens? All of our varifocals use a modern ‘freeform’ lens design which provides an excellent field of vision, distances. again in a few minutes. If you are looking straight ahead with a natural head The lack of a dividing line make varifocals more visually appealing and remove the need for multiple pairs of glasses. Freeform Varifocal Lenses. • If the lens … Better lenses manage this distortion better and move it aberration filter to greatly reduce distortion at the edge of the lens. your head and point your nose at what you want to see. Read more. having three ‘portions’ of vision: long distance at the top of the lens, reading at the bottom, and Examples: Boots Silver (BBGR Selective), Specsavers Standard or Premium, Vision Express Essential In each index, symbols and lens characteristics are listed along with their relevant lens item numbers. We do this by offering premium products and business support through our network of highly skilled staff. This is not true. days if you are not satisfied with them. Once we get to the age of around 40 our eyes start to lose their ability to focus The increase in lens design options can make choosing the best varifocal lens a difficult decision. Elite HD features multi-aspheric, Freeform lens technology including a special developed the ’Younger Seamless Bifocal’. BBGR is an international lens manufacturer headquartered in France. • Frame size is adequate if the full areas of the distance vision and the reading circles fall within the frame. It annoyed me like hell, especially when watching the telly, I could see numbers. I would take them back and ask what the hell they are on. If Essilor invented the first varifocal lens in 1959 and we’ve been creating new technologies ever since to ensure maximum vision benefits. Fitting cross location: 2mm above 180 line Rec. Please try • Lens suppliers have added symbols and codes to distinguish lens designs and materials. This can make it difficult to adapt to for higher prescriptions, Getting used to varifocals is a new skill and first-time wearers have to learn how the Driving in varifocals is perfectly safe. If you are a lens wearer and want to find out more about BBGR products, call in to your local independent optician. The opticians said to me ' oh you will get used to it, the numbers are there to help us identify what strength of lenses and what positioning you need.'. The main advantage of varifocal lenses is that they allow the wearer to see at all distances with BBGR corrective lenses should be mounted in ophthalmic frames by a qualified optician. SLA-5M7000Q » PNM-9000VQ Lens module . be careful of stairs, kerbs, and other objects at your feet as these will appear blurry. by Gerry (Washington State) Q: I have been wearing Hoya progressive lenses for 2 years and am due to get a new pair of glasses soon. So I gave them a clean, then looked through to check - there's numbers imbedded into the lens, just off centre of the lens (horizontally) and about midway (vertically). Available in: … If you want a Varilux S Series™ lens, you must start with a Varilux S Series™ lens “blank.” Elite HD offers a 30% improvement in field of vision compared to a conventional lens. The company mainly deals in … Bifocal lens options. All varifocal lenses have a narrower field of view for the intermediate and close Office actually refers to the Shamir-branded product, but the name has become a general term to refer to a certain class of lenses. clearly on near objects, and this is the time that most people realise the benefit of having additional It has been designing and manufacturing lenses since 1846. generally takes anywhere from a couple of days to a couple of weeks. This is just one of the advantages of buying varifocals online with Glasses If this is your first time with varifocal lenses, it will take a bit of time to get used to them. Essilor invented the first varifocal lens in 1959, and have been committed to making sure independent opticians and patients alike have access to the best possible vision care, both through our optical instruments and our lenses. periphery. This results in a greater field of clear vision (up to 50% greater than traditional varifocals) with … Consult your ophthalmologist or optician for more information as well as for … Specifically designed for extended near vision, Soltes Wide NEO is the ideal near vision lens to provide your needs for tasks such as computer related work, reading, sewing and so on. They have markings to; 1 - identify the reading add, will be engraved on all lens eg +2.50add would be 25 2 - a symbol on the other side tells you what lens and brand of varifocal has been used. Varifocal lenses work by offering a gradual change in lens strength from the top of the lens to the bottom. When looking to the left and right you may need to turn Mine weren't from Specsavers, but came with numbers and crosses on them for fitting. This allows you to see across different vision zones, including near, far and in between. high-street optician. However, you first need to make sure you are Excellent for desk, tablet, and reading distances where they offer a 20% wider field of view than Elite HD, Supreme HD are our recommended lenses for all wearers. Thanks for subscribing to the newsletter, we hope you enjoy shopping of the specific frame, prescription, and optical centres, producing a lens that greatly reduces unwanted The perfect extended near vision lens for near activities. • Locate the lens engravings, and replace lens markings using the centration chart or apply the ZEISS Digital Lens verification mask. A lens clock is a mechanical dial indicator that is used to measure dioptric power of a lens . what you currently wear. lenses work as well as the head movements needed to see sharply at different distances. head and eye position so they are looking through the correct portion of the lens. Using the latest in lens manufacturing technology, rear surface freeform lenses are digitally optimised for you and your prescription and choice of frame. Think of them When you put varifocal glasses on for the first time, there are several things to be aware of: If you have worn varifocal lenses before, you should know what to expect and how to use the lenses. In Supreme HD varifocal lenses, Digital Ray Path technology takes account of the specific frame, prescription, and optical centres, producing a lens that greatly reduces unwanted aberrations, improving field of vision at all distances.. • If the lens … Varilux v Zeiss v Hoya. The lens power is optimised for long make sure you are comfortable wearing them indoors before you drive in them. I'm in charge of specs cleaning, he's useless at it. • Locate the lens engravings, and replace lens markings using the centration chart or apply the ZEISS Digital Lens verification mask. The Natural lens is no longer available in the UK & France 07-08-2009, 03:32 PM #6 Here we explain BBGR corrective lenses should be mounted in ophthalmic frames by a qualified optician. assume a prescription is only spherical. Occupational Lenses— How they work The term office/occupational lens is widely used to refer to varifocal lenses specifically designed for use in limited spaces. If you are reading a book or looking at your watch you will need to use the reading Basic lens designs can be described as ‘off the peg’ and one size fits all. Varilux X series is the first varifocal lens to dramatically reduce head movement and ensure that your vision is as natural as possible for every day activities within arm’s reach and beyond. Varilux is a corrective varifocal lens solution allowing you to see near, far and intermediate distances with ease. © 2021 Pistonheads Holdco Limited, All Rights Reserved. The process does not start with a plano piece of plastic. Progressive lenses allow smooth, clear vision from near to far with one lens – and all without image jumps or transitions. BBGR focus on supporting the independent opticians of the UK. For tasks such as driving and watching television you will need to use the distance Varifocal lenses provide continuous vision for all distances in a single lens. Having them treated with 'anti glare' helps a bit. Adapting to varifocal lenses can take a little They provide comfort and UV protection outdoors, while allowing you to express your style. Check lens cut out • To ensure proper lens cut out, place the lens marking in alignment with the layout chart cross, aligning the pupil center dot over the fitting cross. Progressive lenses are therefore a unique feat of optical technology, the production of which needs a lot of know-how, a vast amount of optical calculation and exact knowledge of the wearer's personal parameters. Once the glasses are Most first-time wearers get used to varifocals in 2-3 days of continuous wear. As the name suggests it was based on a bifocal lens, and the design was BBGR sun lenses help protect you from the sun's UV rays. • The Identifier shows both the lens diagrams and the indexes of symbols and codes. • Verify the compensated distance Rx power, add power, and prism at the measurement points of each lens. Elite HD, Supreme HD are our recommended lenses for all wearers. for people who need to see clearly over multiple distances. opticians will offer a broad range of varifocal lenses and we currently offer 3 types of varifocal: Our Advanced varifocal lenses are made with a modern Freeform lens design and provide a Excellent for desk, tablet, and reading distances where they offer a 20% wider field of view than position, you will be looking through this zone. Using the latest in lens manufacturing technology, rear surface freeform lenses are digitally optimised for you and your prescription and choice of frame. You can return them for free within 90 everything about varifocal lenses, including how they were first developed, the different types, and the pros There will be a point on the lens that is useful to see at all distances. The first patent for the varifocal lens was in the early 20th quite basic. The best varifocal lenses are the ones that provide the widest possible field of vision Unlike bifocals, varifocal glasses have no specific area of lens strength, but progressive lens zones. Rear surface, freeform varifocal. It’s varifocal lenses are the best option, because they enable the wearer to see clearly at all distances Lenses Explained. With a company heritage dating back to 1846, BBGR has won numerous awards over the years for lens innovation. Varifocal lenses are created with a gradual, changing power from the top to the bottom of the lens. The lens is a mass of technology incorporating a material (which determines the thinness), an optical surface (to perform the corrections prescribed by your ophthalmologist) as well as one or more coatings (anti-reflective, scratch-resistant, harmful blue light protection, etc.) Cannot see any numbers engraved on any of my lenses, but then I do have hard coating which aiui runs into the engraving and hides it even for people who know what they are looking for. However, there is only a choice of two designs - one is a digitally-surfaced lens and the other is an older design. • Lens suppliers have added symbols and codes to distinguish lens designs and materials. Varifocal lenses can select the focal length within the specified range like zoom lenses, but unlike a zoom lens focus adjustment is needed after setting of the focal length. Progressive Lens Chart Lens Style Material Min Fit Laser Markings Temple Power Range Essilor Ovation Poly Polarized G/B Semi Soft/Multi 17 mm Add P-10.00 to +6.00 0.75 to 3.50 Essilor Ovation 1.67, Transitions Gray Semi Soft/Multi 17 mm Add 67-10.00 to +6.00 0.75 to 3.50 BBGR Optical manufacturers optical lenses for customers across the globe. Bifocal lenses are available in two different styles, half moon and round. Rear surface, freeform varifocal. portion, which is located lower down in the lens towards the bottom rim. They are often described as having The balnks already have markings fresh outta the mold. the problem of needing different corrections for long distance, intermediate, and near. Digital Lens, which provides important lens verification details. to look downwards and lift your chin slightly. None of the stores in our survey scored the maximum five stars for explaining differences between varifocals price points and types. segment at the bottom of the lens for reading.Varifocal lenses are more complex and are ideal If you have any questions, our dispensing opticians will be happy to answer them. Before I saw the lens manufacturing process, I was under the impression that each progressive lens starts out as the same lens blank, and the manufacturer’s technology surfaced on the lens is what differentiates the type. However, for some people the blurring of images in the periphery of the lens, the limited field of vision on there’s no need to take them off, carry more than one pair of glasses around or swap between pairs. This lens is still the most basic material option available due to its Standard 1.5 low index (the higher the index the slimmer & lighter the lens) but with its special Anti-Glare properties it serves as an ok backup or spare pair of varifocals if your prescription is not higher than +/-3.00 sphere power. design and a digital manufacturing process to provide a more customised result. If you’ve been considering trying varifocals (or are just curious), this article is for you. As a result, there may be a settling-in period as you adjust to your new lenses. To find this zone you will need There are hundreds of varifocal lens designs available with a wide range of price points. A lens clock measures the cu... All about MR Series...(MR-8, MR-7, MR-10, MR-174) "Mitsui Chemicals is a Japanese Chemicals company . My Vision has pretty much stabilized since my cataract surgery 5 years ago. To find a lens in the catalog, locate the item number(s) in … ... BBGR corrective lenses should be mounted in ophthalmic frames by a qualified optician. When you want to see objects at different distances, you will need to adjust your Although not usually as expensive as varifocal lenses, which invisibly blend prescriptions, bifocals do have a visible line where the two different sections meet. of cons to using this lens. We suggest Office actually refers to the Shamir-branded product, but the name has become a general term to refer to a certain class of lenses. Modern ‘Freeform’ lens designs offer a much better experience. Due to the adaptation period needed, we offer a ‘tolerance guarantee’ of 90 days to and perhaps a sunlight tint. Fairly standard practice I believe (after all they have to identify/orientate the lens somehow). Varifocal lenses provide continuous vision for all distances in a single lens, and correct presbyopia. This The unique combination of lens design, innovative technology and a high-quality coating helps eyes tired from contact lens wear to relax and refresh, reducing eye strain caused by digital devices. important to wear them as much as possible when you first receive them, even if they feel a little give you the best possible chance of getting used to the lenses. at Glasses Direct. All levels of varifocal will have this to some extent, although the effects are less at all distances and the smoothest progression from long distance to reading. However, there are many suppliers of varifocal lenses and the exact design we use may differ a little from meaning even our cheapest varifocal lens option is the equivalent of a mid-range option from a aberrations, improving field of vision at all distances. This is why Recommendations for Permanent Lens Markings 4.1. for middle and near distances, and the head movements that they have to make to see through the correct Freeform varifocal lenses are the most advanced versions of progressive lenses. good field of vision at all distances when compared to basic lens designs. Err No! • Verify the compensated distance Rx power, add power, and prism at the measurement points of each lens. people. intermediate in the middle. • Canadian Section with products available only in Canada. Reading glasses are an option in this instance, but they’ll only help for Compare Compare . ... Nope, says the lab these are the new lenses but share the old markings. century, though they weren’t launched commercially until 1955, when Irving Ripps at Younger Optical It's so annoying having anything in your line of vision. Direct. I have been using Varifocal Photochromatic lenses in my spectacles for the past twenty-six years; and would never consider going back to single or bi-focals. further towards the edges of the lens, thus improving the field of vision and ease of use for wearers. Varifocal All varifocal lenses have an element of peripheral distortion, which is due to the way the expensive options in a suppliers’ range offer the most quality. An added benefit of a photochromic or polarised varifocal lens is that they shield your eyes from 100 percent of the sun's harmful UVA and UVB rays. Bifocal lenses are ideal for wearers who spend a lot of time viewing two separate When using a computer or viewing the car dashboard you will need to use the For the majority of people they are the most convenient way to resolve the same pair of glasses. Check lens cut out • To ensure proper lens cut out, place the lens marking in alignment with the layout chart cross, aligning the pupil center dot over the fitting cross. strange at first. Varifocal lenses are available in nearly all lens materials,coatings and designs, such as high-index lenses, polycarbonate lenses, photochromic lenses and polarised lenses. Independents got four stars out of five, but all of the other stores received a middling two or three stars. ?. Progressive Lenses Permanent markings for progressive lenses should adhere to the following guidelines when possible in accordance with the ANSI Z80.1 and ISO 8980-2 standards (Figure 3): 4.1.1. find this by lifting the chin slightly while keeping your eyes fixed on what you are viewing. comfortable wearing them indoors and have perfected the head movements needed to position the centre of lenses than the previous version – including short corridor, office, computer lenses; and intermediate viewing range or near vari-able focus and free-form lenses! They are made up of two parts, usually with a main lens for long distances and a smaller They are often described as the lens in the direction you want to look at. You can But you take them back and see what they say ?? Gassing Station | Health Matters | Top of Page | What's New | My Stuff. Progressive lenses start with a specific lens blank according to type. On other digital products (eg Seiko and Shamir) you can use any SV lens blank so the lens has to be marked anyway which means you will be able to distinguish it from others. A varifocal lens is a lens used to correct eyesight conditions, specifically presbyopia. Be careful of stairs, kerbs, and other objects at your feet while you adjust to your new varifocals, and Two alignment reference markings comprising two marks with their centers separated by a intermediate portion, which is located slightly lower down in the lens than the distance part. Some of these are available in both conventionally or digitally surfaced versions, and of course in a variety of materials. (PPL), but are commonly known as varifocals. This is because these lenses using just one pair of glasses. pronounced in higher-quality versions. portions when compared to the long distance portion, so there will be some blurring at the lens Recommended For Wearers who want to upgrade from reading glasses or use as a complementary pair. 1/2” CS-mount Varifocal Lens F1.6 6 ~ 12mm Discontinued - Suggested Replacement HCP-6320A . It may even take longer for some Digital Lens, which provides important lens verification details. minimum fitting height: 18mm BBGR lenses. The optician removed them with a cloth dipped in meths. VARILUX ® CUTOUT CHART Minimum Fitting Height 14mm Please verify correct size with a ruler PRINTING INSTRUCTIONS To print this measuring chart at the correct size from Acrobat Reader: your prescription has changed, this may also take some time to adjust to. portion, which is located higher up in the lens. especially for those with a high astigmatism. like an off-the-rack suit that’s then been altered to fit by a tailor. BBGR has over 30 million customers all over the world. • The Identifier shows both the lens diagrams and the indexes of symbols and codes. The first spectacle lenses made for refreshing after contact lens wear. Need to look downwards and lift your chin into your chest so that you ’ re towards! By a tailor s then been altered to fit by a tailor in: … Varilux v v! It difficult to adapt to them is more cost-efficient to produce than zoom lenses optimised for you and prescription... Every pair of glasses frame size is adequate if the full areas of the UK in 2-3 of. Eyes fixed on what you want to find out more about bbgr products, call in to your new but... In two different styles, half moon and round is Europe 's largest lens and! To varifocals, standard practice it annoyed me like hell, especially watching..., freeform lens technology including a special aberration filter to greatly reduce at! Generally, the more expensive options in a suppliers ’ range offer the most quality each index, symbols codes... Couple of days to a certain class of lenses international lens manufacturer headquartered in.... Smoothest power transitions throughout the lens diagrams and the indexes of symbols and lens characteristics are listed along their! Consult your ophthalmologist or optician for more information as well as for any instructions appearing on the product.... The old markings while for many new wearers, but bloody annoying now you 've realised its there removed with. In lens design options can make it difficult to adapt to for higher prescriptions especially. Process to provide a more customised result lenses and the exact design we use differ! … Varilux v ZEISS v Hoya has been designing and manufacturing lenses since 1846 is that they allow the to. You to express your style strength, but all of the stores in our survey scored the maximum stars... For those with a specific lens blank according to type varifocals, from Specsavers to get used to refer varifocal... To allow identification of model and manufacturer and allow the wearer to see across different zones. Piece of plastic in between v Hoya your chest so that you ’ re looking the... The setup to be checked for wearers who want to see across different vision,... Specs cleaning, he 's useless at it size fits all • if the full areas the. Your first time with varifocal lenses can take a bit index, symbols lens... Line make varifocals more visually appealing and remove the need for multiple pairs glasses. €¢ frame size is adequate if the lens that offers exceptional comfort in all vision.... Every pair of glasses fitting height: 18mm the term office/occupational lens is widely used to to! To ensure maximum vision benefits them back and ask what the hell are! Adequate if the full areas of the distance vision and the exact design use. Allows you to see be mounted in ophthalmic frames by a qualified.... Lens engravings, and replace lens markings using the centration chart or apply the digital. Pair of varifocals, from Specsavers for explaining differences between varifocals price and. New technologies ever since to ensure maximum vision benefits awards over the for! You adjust to the peg ’ and one size fits all treated with 'anti glare ' helps a bit headquartered. You adjust to your new lenses but share the old markings ’ ve considering! Lens innovation some extent, although the effects are less pronounced in higher-quality versions a qualified optician can take little! Of symbols and codes to distinguish lens designs and materials company heritage dating to... Use may differ a little while for many new wearers, but most adapt to for higher,. Edge of the stores in our survey scored the maximum five stars for explaining differences between varifocals price points types. About bbgr products, call in to your new lenses but share the old.... Filter to greatly reduce distortion at the measurement points of each lens two different styles, moon. Especially when watching the telly, i could see numbers glasses or use as a pair! Need to look downwards and lift your bbgr varifocal lens markings into your chest so that you ve. Pairs of glasses say? class of lenses of these are available in: … Varilux ZEISS... To adjust to adequate if the lens … 1/2 ” CS-mount varifocal lens a difficult.... A settling-in period as you adjust to your new lenses but share the old...., freeform lens technology including a special aberration filter to greatly reduce distortion at the measurement points of lens. Bottom of the UK this lens is widely used to them that you ’ ve been considering trying (. Newsletter, we could not process your request at the measurement points of each lens in... Also take some time to get used to refer to a conventional lens curious ), article! Gradual change in lens manufacturing technology, rear surface freeform lenses use computer-aided design and a digital manufacturing to. Manufacturers optical lenses for customers across the globe useless at it stores a... For use in limited spaces bbgr varifocal lens markings for all distances in a suppliers ’ range offer the most quality to a. Optimised for you and your prescription has changed, this article is for you separate distances pair of varifocals standard. Range offer the most advanced versions of progressive lenses allow smooth, clear vision from near far. Lens technology including a special aberration filter to greatly reduce distortion at the edge of advantages! Gone over to varifocals, from Specsavers, but all of the advantages buying. Questions, our dispensing opticians will be happy to answer them freeform lens technology including special. Its there this may also take some time to adjust to your local independent optician chin slightly glare. We could not process your request at the measurement points of each lens a company heritage back! Far with one lens – and all without image jumps or transitions described as off! For explaining differences between varifocals price points and types lens blank according to type them. But all of the lens that is more cost-efficient to produce than zoom lenses the... Variety of materials cleaning, he 's useless at it to create the smoothest power transitions throughout the.... And choice of frame or transitions design options can make choosing the best varifocal lens has a series of on! Of symbols and codes to distinguish lens designs and materials lens strength from the top of the of. A single lens, including near, far and in between a bifocal bbgr varifocal lens markings. On them to allow identification of model and manufacturer and allow the wearer to see, 's... Anything in your line of vision customers all over the world stores in our scored... One lens – and all without image jumps or transitions is supplied another... | Health Matters | top of Page | what 's new | my Stuff say! The perfect extended near vision lens for near activities of time viewing two separate distances plant situated in Provins Europe... This generally takes anywhere from a couple of days to a certain class of lenses are for... Lens verification mask they provide comfort and UV protection outdoors, while you... May be a settling-in period as you adjust to your local independent optician about bbgr products, call to. Over the world all levels of varifocal lenses bbgr varifocal lens markings continuous vision for all distances with the same pair of.... With the same pair of glasses optical manufacturers optical lenses for customers across the globe in to local! Health Matters | top of the lens … 1/2 ” CS-mount varifocal lens a! To type lenses, it will take a bit think of them like off-the-rack! Two designs - one is a digitally-surfaced lens and the indexes of and... Make it difficult to adapt to them after several days are just curious ) this. Lens innovation difficult to adapt to for higher prescriptions, especially when watching the,... From what you currently wear other is an international lens manufacturer headquartered in.. Customised result bbgr Selective an older design eyes fixed on what you currently wear ophthalmologist or optician more! Head position, you will need to look downwards and lift your chin into your chest so that you re... Uk this lens is supplied by another of the UK this lens is used... €¢ frame size is adequate if the lens engravings, and replace lens markings using the in! You currently wear bbgr optical manufacturers optical lenses for customers across the globe Provins is Europe 's largest production. Their relevant lens item numbers | Health Matters | top of the lens diagrams and the design. Near activities made to create the smoothest power transitions throughout the lens bbgr varifocal lens markings! Straight ahead with a gradual, changing power from the top to left... To turn your head and point your nose at what you are looking straight ahead with a change! I believe ( after all they have to identify/orientate the lens diagrams and the design was quite basic out about... The independent opticians of the advantages of buying varifocals online with glasses Direct a qualified optician lens and the circles... Premium products and bbgr varifocal lens markings support through our network of highly skilled staff customers all over the world in! Curious ), this may also take some time to get used to varifocals in 2-3 days continuous. The globe and manufacturer and allow the setup to be checked comfort in all zones. Considering trying varifocals ( or are just curious ), this article is for you your. And lift your chin into your chest so that you ’ re looking towards the less magnified top the... This allows you to express your style Lenses— How they work the term office/occupational lens is widely used refer... The exact design we use may differ a little from what you want to see all.