GB2251702A - Spectacles attachment - Google Patents

Spectacles attachment Download PDF

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Publication number
GB2251702A
GB2251702A GB9125508A GB9125508A GB2251702A GB 2251702 A GB2251702 A GB 2251702A GB 9125508 A GB9125508 A GB 9125508A GB 9125508 A GB9125508 A GB 9125508A GB 2251702 A GB2251702 A GB 2251702A
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GB
United Kingdom
Prior art keywords
spectacles
attachment
lens
supplementary
pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9125508A
Other versions
GB9125508D0 (en
Inventor
Derek Glick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB9125508D0 publication Critical patent/GB9125508D0/en
Publication of GB2251702A publication Critical patent/GB2251702A/en
Withdrawn legal-status Critical Current

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C9/00Attaching auxiliary optical parts
    • G02C9/02Attaching auxiliary optical parts by hinging
    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00Optical parts
    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00Optical parts
    • G02C7/02Lenses; Lens systems ; Methods of designing lenses
    • G02C7/08Auxiliary lenses; Arrangements for varying focal length
    • G02C7/086Auxiliary lenses located directly on a main spectacle lens or in the immediate vicinity of main spectacles

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Eyeglasses (AREA)

Abstract

An attachment for spectacles adapting them for use with VDU's, the attachment (1) comprising two similar lenses (2) of about 1.25 diopters power held in side-by-side coplanar relationship by a bridging member (3) secured to each lens by screw fasteners (4). The bridging member (3) is pivotally connected to a clip member (5) carried by a clamp (6) by which the attachment may be secured to the nose bridge (7) of a pair of spectacles (8). The pivotal connection between the bridge member (3) and clip member (5) is arranged to allow the lens (2) to be swung up through 90 DEG from the position shown in Figure 1 into an out-of-view position as shown in Figure 2. <IMAGE>

Description

ImProvements in Spectacles This invention relates to improvements in spectacles and is primarily, but not essentially, concerned with spectacles for use with visual and video display units such as terminal units of computer systems.
It is a normal process for people in their mid-40s to start experiencing difficulties with their near sight.
They may resort to wearing bifocals at work if they need to see clearly in the distance as well as doing close work. The reason for this is that reading glasses often blur the distance vision.
With the swing towards computing and display screens of various formats many users in this category are finding they have to tilt their head back to see the displays. Even when this is done, quite often the screen is still not clear as the normal reading lenses are more powerful and designed only for the closer task of normal desk work.
It is an object of this invention to provide means to convert the distance lenses to the correct power for most screens which will be viewed at distances between 60 to 80 cms and which will eliminate the need for head tilt.
It is a further object to provide such means, primarily but not essentially, for use by wearers of bifocal lenses.
According to this invention there is provided an attachment for spectacles comprising a pair of supplementary lenses joined by a bridge member in side by side coplanar relationship, said bridge member being pivotally or hingedly connected to a clip member, said clip member having clamp means to secure same adjacent the nose bridge of a pair of spectacles whereby the lenses may be swung from a position wherein each overlies in juxtaposed parallel relationship a respective spectacle lens, to a position in which each supplementary lens extends forwardly substantially at right angles to a spectacle lens.
Preferably each supplementary lens over lies an upper portion only of each spectacle lens. The supplementary lens is advantageously arranged such that, relative to the field of view seen by the eye, it overlies the area extending from just below the horizontal medial plane to the upper limit of useful vision.
The range of powers of the supplementary lenses will typically lie between +1.00 to 1.75 Diopter (spherical). (+1.25 being a preferred standard power.) Around the age of 45 years the average normal eye, even if it has perfect distance vision, will start to experience difficulty focusing at the normal reading range. The spectacle lenses that correct this condition (called presbyopia) make the near vision clearer, but blur the distance vision in varying degrees, depending on their power. As the power increases it often becomes impossible for the person to view normal printed material on a desk at say 40 cms away and also see a display at 70 cms with the same lenses. This can make life very difficult.
This invention provides an attachment to be placed onto the persons existing distance glasses and it will focus the eyes at the correct distance for the display screen (which is further away than normal reading). It is designed to cover a substantial area of the upper part of the wearr's spectacles.
If a person is a bifocal wearer then they often experience two problems when working on a display screen.
The first one may be that the reading portion of the bifocal is too strong for the greater viewing distance involved and so the screen is blurred. The second problem is that the screen is set higher so that a normal bifocal would not cover it. This can only be covered by straining the chin upwards, an action which is neither comfortable nor good for the neck. This is normally dealt with in one of two ways.
If the person just works on the screen and does not need to refer to text closer than that, then it is possible to make a pair of spectacles of single vision lenses of the correct power for the screen. This is the cheapest answer, but they will still involve the wearer or his employer in paying for the sight test, the frames and the lenses. The glasses will need to be changed when looking away from the screen.
If the wearer needs to see close text and the further display then he will need bifocals which are constructed with normal reading power at the bottom but with a weaker reading power in the top, instead of the usual distance power. These are even more costly and also need to be removed when looking across the room or getting up from the desk.
This invention has the advantages that if the person clips the attachment over their own distance prescription then this is technically accurate and a precise correction for the screen situated in the ranges of intermediate vision. A wearer of normal bifocals will be able to convert them to the correct powers for screen work/desk work at will without having to have specialised bifocals made. Even if the person's basic eyesight changes, the attachment can be just transferred to their new spectacles.
A further advantage is that the means of this invention can be quickly pivoted to an out-of-use position.
The attachment has a matched pair of positive power lenses of such power that they are the equivalent to the optical addition that is needed to convert distance spectacles for the longer than normal near range needed by display screens as described.
The invention is further described and illustrated with reference to the drawings showing an embodiment by way of example. In the drawings: Figure 1 shows in front view one embodiment of attachment according to this invention, Figure 2 shows a rear view of the attachment of Figure 1, and Figure 3 shows a field of view diagram.
Referring to the drawings, the attachment 1 comprises two similar lenses 2 of about 1.25 diopters power held in side-by-side coplanar relationship by a bridging member 3 secured to each lens by screw fasteners 4. The bridging member 3 is pivotally connected to a clip member 5 carried by a clamp 6 by which the attachment may be secured to the nose bridge 7 of a pair of spectacles 8.
The pivotal connection between the bridge member 3 and clip member 5 is arranged to allow the lens 2 to be swung up through 900 from the position shown in Figure 1 into an out-of-view position as shown in Figure 2.
The clamp 5 has a horizontal abutment bar Sa with fingers 9 to which is pivotally attached clamp 6 having two spaced fingers 6a. The clamp 6 is attached to a press tab 5b which causes the clamp 6 to pivot outwards on applied finger pressure against spring 6b. The attachment, by this means, may be installed or removed on the spectacle nose bridge 7.
The ends of finger 6a may include a resilient protective layer 6c. The bridge member 3 lies in a channel defined between a forward abutment Sc and rearward abutments Sd of the clamp 5. The bridge member toggles between the two positions by virtue of a flat part which co-operates with the tail end of spring 6b (not show).
Each supplementary lens 2 only overlies a certain area of the lens of the spectacles 8 defined by the field of view as shown in Figure 3. As may be seen the area B lying within the field of view of the eye 20 is covered by the supplementary lens 2 whereas the area A is unaffected and subject only to the normal spectacle lens The advantage of this arrangement, achieved by careful selection and experiment of the area of coverage and power, is that a comfortable focusing distance of up to 80 cms is achieved for viewing a VDU or music whereas a normal desk viewing distance of about 35 to 60 cms is still available, through the lower uncovered portion of the normal bifocals.
The supplementary lenses will conveniently be of small size and of plastic for reduced weight.

Claims (7)

1. An attachment for spectacles comprising a pair of supplementary lenses joined by a bridge member in side by side coplanar relationship, said bridge member being pivotally or hingedly connected to a clip member, said clip member having clamp means to secure same adjacent the nose bridge of a pair of spectacles whereby the lenses may be swung from a position wherein each overlies in juxtaposed parallel relationship a respective spectacle lens, to a position in which each supplementary lens extends forwardly substantially at right angles to a spectacle lens.
2. An attachment according to Claim 1 wherein, in use, each supplementary lens overlies an upper portion only of each spectacle lens.
3. An attachment according to Claim 2, wherein in use, each supplementary lens is arranged such that, relative to the field of view seen by the eye, it overlies the area extending from just below the horizontal medial plane to the upper limit of useful vision.
4. An attachment according to any preceding claim, wherein the power of each supplementary lens is between +1.00 and +1.75 Diopter (spherical).
5. An attachment according to any preceding claim wherein a horizontal part of the bridge member is located in a channel provided in the clip member, said channel providing a toggle action whereby the supplementary lenses are urged into either said overlying position or said forwardly extending position.
6. An attachment according to any preceding claim, wherein the clip member comprises a horizontal bar to abut the front frame of a pair of spectacles and a clamp member pivotally attached to said bar, said clamp member being displaceable, against pressure of a spring, by a tab whereby the clamp may be attached to or removed from a pair of spectacles.
7. An attachment for the purpose herein set forth, substantially as described and exemplified with reference to the drawings.
GB9125508A 1990-11-29 1991-11-29 Spectacles attachment Withdrawn GB2251702A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909026021A GB9026021D0 (en) 1990-11-29 1990-11-29 Improvements in spectacles

Publications (2)

Publication Number Publication Date
GB9125508D0 GB9125508D0 (en) 1992-01-29
GB2251702A true GB2251702A (en) 1992-07-15

Family

ID=10686223

Family Applications (2)

Application Number Title Priority Date Filing Date
GB909026021A Pending GB9026021D0 (en) 1990-11-29 1990-11-29 Improvements in spectacles
GB9125508A Withdrawn GB2251702A (en) 1990-11-29 1991-11-29 Spectacles attachment

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB909026021A Pending GB9026021D0 (en) 1990-11-29 1990-11-29 Improvements in spectacles

Country Status (1)

Country Link
GB (2) GB9026021D0 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741164A1 (en) * 1995-11-09 1997-05-16 Buffard Denis Spectacle frame with hinges for secondary lenses
US5920371A (en) * 1996-07-12 1999-07-06 Chang; Byung Jin Versatile headband optical mounting assembly
US6025868A (en) * 1995-02-24 2000-02-15 Smart Vcr Limited Partnership Stored program pay-per-play
US6064520A (en) * 1993-07-19 2000-05-16 Nowak; David Ocular mounting assembly
US7496941B2 (en) 1995-02-24 2009-02-24 Smart Vcr Limited Partnership Stored program pay-per-play
FR2972818A1 (en) * 2011-03-17 2012-09-21 Philippe Lavie Glasses for use over corrective spectacles to avoid eyestrain of computer operator, have flexible swiveling face articulated on curved front part to support two converging lenses, where flexible face upwardly/downwardly swivels around axle
CN108845430A (en) * 2018-06-25 2018-11-20 广州锐之目光学科技有限公司 A kind of related preventive mirror

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1010353A (en) * 1963-01-11 1965-11-17 American Optical Corp Improvements in auxiliary eye protectors
US3531188A (en) * 1968-05-31 1970-09-29 Foster Grant Co Inc Flip-up lenses for spectacles
US3876295A (en) * 1974-02-27 1975-04-08 American Optical Corp Auxiliary clip-on eye protectors
GB1515828A (en) * 1976-04-30 1978-06-28 Nannini G Auxiliary lens units for spectacles
EP0128735A2 (en) * 1983-06-09 1984-12-19 Polaroid Corporation Two-position auxiliary lens mounting device for spectacles
EP0238479A2 (en) * 1986-03-21 1987-09-23 Polaroid Corporation Pivoting optical accessory for use with spectacles
US4961639A (en) * 1989-06-30 1990-10-09 Lazarus Stuart M Prism section lens spectacles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1010353A (en) * 1963-01-11 1965-11-17 American Optical Corp Improvements in auxiliary eye protectors
US3531188A (en) * 1968-05-31 1970-09-29 Foster Grant Co Inc Flip-up lenses for spectacles
US3876295A (en) * 1974-02-27 1975-04-08 American Optical Corp Auxiliary clip-on eye protectors
GB1515828A (en) * 1976-04-30 1978-06-28 Nannini G Auxiliary lens units for spectacles
EP0128735A2 (en) * 1983-06-09 1984-12-19 Polaroid Corporation Two-position auxiliary lens mounting device for spectacles
EP0238479A2 (en) * 1986-03-21 1987-09-23 Polaroid Corporation Pivoting optical accessory for use with spectacles
US4961639A (en) * 1989-06-30 1990-10-09 Lazarus Stuart M Prism section lens spectacles

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6064520A (en) * 1993-07-19 2000-05-16 Nowak; David Ocular mounting assembly
US6704141B1 (en) 1993-07-19 2004-03-09 General Scientific Corporation Ocular mounting assembly
US6025868A (en) * 1995-02-24 2000-02-15 Smart Vcr Limited Partnership Stored program pay-per-play
US7496941B2 (en) 1995-02-24 2009-02-24 Smart Vcr Limited Partnership Stored program pay-per-play
FR2741164A1 (en) * 1995-11-09 1997-05-16 Buffard Denis Spectacle frame with hinges for secondary lenses
US5920371A (en) * 1996-07-12 1999-07-06 Chang; Byung Jin Versatile headband optical mounting assembly
FR2972818A1 (en) * 2011-03-17 2012-09-21 Philippe Lavie Glasses for use over corrective spectacles to avoid eyestrain of computer operator, have flexible swiveling face articulated on curved front part to support two converging lenses, where flexible face upwardly/downwardly swivels around axle
CN108845430A (en) * 2018-06-25 2018-11-20 广州锐之目光学科技有限公司 A kind of related preventive mirror

Also Published As

Publication number Publication date
GB9026021D0 (en) 1991-01-16
GB9125508D0 (en) 1992-01-29

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)