![Oval white double convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/518/large_thumbnail_smg00028115.jpg)
![Display board of spectacles and lenses, c.1921](https://coimages.sciencemuseumgroup.org.uk/291/935/small_thumbnail_1921_0323_0236__0002_.jpg)
![Display board of spectacles and lenses, c.1921](https://coimages.sciencemuseumgroup.org.uk/291/932/small_thumbnail_1921_0323_0122__0001_.jpg)
![Display board of spectacles and lenses, c.1921](https://coimages.sciencemuseumgroup.org.uk/291/934/small_thumbnail_1921_0323_0236__0001_.jpg)
![Display board of spectacles and lenses, c.1921](https://coimages.sciencemuseumgroup.org.uk/291/937/small_thumbnail_1921_0323_0236__0003_.jpg)
![Display board of spectacles and lenses, c.1921](https://coimages.sciencemuseumgroup.org.uk/291/938/small_thumbnail_1921_0323_0236__0004_.jpg)
![Display board of spectacles and lenses, c.1921](https://coimages.sciencemuseumgroup.org.uk/291/933/small_thumbnail_1921_0323_0122__0002_.jpg)
![Display board of spectacles and lenses, c.1921](https://coimages.sciencemuseumgroup.org.uk/291/936/small_thumbnail_1921_0323_0122__0003_.jpg)
Collection of spectacles (289), spectacle lenses (93) mounted on pyramid fitting, with labels attached as detailed on list "the evolution of the Bi-focal lens" (neg nos S.M. 2007) may be sold to the public, see R.P. 24/599, dr. Van Rohr. See individual stroke records for more details.
Pyramid shaped exhibition panel mounted with a selection of 93 clear and coloured lenses. The display board is part of the Duncombe Collection of spectacles, which deals with the various types of eye defect that can be rectified with eyeglasses. These include correction for hypermetropia, presbyopia, myopia, astigmatism and strabismus.
![Oval white double convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/518/large_thumbnail_smg00028115.jpg)
![Spectacle case of wood covered in green shark skin](https://coimages.sciencemuseumgroup.org.uk/382/927/large_thumbnail_smg00062382.jpg)
Spectacle case of wood covered in green shark skin
1810-1829
![Oval white double concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/513/large_thumbnail_smg00028110.jpg)
Oval white double concave spectacle lens
![Silver-framed 'visuals' spectacles](https://coimages.sciencemuseumgroup.org.uk/320/370/large_thumbnail_smg00031519.jpg)
Silver-framed 'visuals' spectacles
1775-1800
![Oval white meniscus convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/514/large_thumbnail_smg00028111.jpg)
Oval white meniscus convex spectacle lens
![Oval white meniscus concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/510/large_thumbnail_smg00028107.jpg)
Oval white meniscus concave spectacle lens
![Round blue double convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/515/large_thumbnail_smg00028112.jpg)
Round blue double convex spectacle lens
![Oval blue double concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/511/large_thumbnail_smg00028108.jpg)
Oval blue double concave spectacle lens
![Oval blue meniscus convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/522/large_thumbnail_smg00028119.jpg)
Oval blue meniscus convex spectacle lens
![Oval blue meniscus concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/519/large_thumbnail_smg00028116.jpg)
Oval blue meniscus concave spectacle lens
![Oval pink meniscus convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/520/large_thumbnail_smg00028117.jpg)
Oval pink meniscus convex spectacle lens
![Oval smoke double convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/521/large_thumbnail_smg00028118.jpg)
Oval smoke double convex spectacle lens
![Oval smoke double concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/516/large_thumbnail_smg00028113.jpg)
Oval smoke double concave spectacle lens
![Oval smoke meniscus convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/517/large_thumbnail_smg00028114.jpg)
Oval smoke meniscus convex spectacle lens
![Oval smoke meniscus concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/526/large_thumbnail_smg00028123.jpg)
Oval smoke meniscus concave spectacle lens
![Oval smoke deep double concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/524/large_thumbnail_smg00028121.jpg)
Oval smoke deep double concave spectacle lens
![Oval amber double concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/523/large_thumbnail_smg00028120.jpg)
Oval amber double concave spectacle lens
![Oval white deep double concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/525/large_thumbnail_smg00028122.jpg)
Oval white deep double concave spectacle lens
![Round white deep meniscus concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/504/large_thumbnail_smg00028101.jpg)
Round white deep meniscus concave spectacle lens
![Round blue deep double concave spectacle lens with ground edges](https://coimages.sciencemuseumgroup.org.uk/307/505/large_thumbnail_smg00028102.jpg)
Round blue deep double concave spectacle lens with ground edges
![Oval white 'new system' deep plano-concave lens.](https://coimages.sciencemuseumgroup.org.uk/307/506/large_thumbnail_smg00028103.jpg)
Oval white 'new system' deep plano-concave lens.
![Round blue double convex cataract lens.](https://coimages.sciencemuseumgroup.org.uk/307/501/large_thumbnail_smg00028098.jpg)
Round blue double convex cataract lens.
![Round white double convex cataract lens.](https://coimages.sciencemuseumgroup.org.uk/307/502/large_thumbnail_smg00028099.jpg)
Round white double convex cataract lens.
![Round smoke double convex cataract lens.](https://coimages.sciencemuseumgroup.org.uk/307/503/large_thumbnail_smg00028100.jpg)
Round smoke double convex cataract lens.
![Round white meniscus convex cataract lens.](https://coimages.sciencemuseumgroup.org.uk/307/512/large_thumbnail_smg00028109.jpg)
Round white meniscus convex cataract lens.
!['New-system' cemented plano-convex cataract lens](https://coimages.sciencemuseumgroup.org.uk/307/509/large_thumbnail_smg00028106.jpg)
'New-system' cemented plano-convex cataract lens
![Round white 'lenticular' concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/508/large_thumbnail_smg00028105.jpg)
Round white 'lenticular' concave spectacle lens
![Oval white convex spectacle lens with bevelled edge for frame](https://coimages.sciencemuseumgroup.org.uk/307/507/large_thumbnail_smg00028104.jpg)
Oval white convex spectacle lens with bevelled edge for frame
![Oval white concave spectacle lens with bevelled edge](https://coimages.sciencemuseumgroup.org.uk/307/496/large_thumbnail_smg00028095.jpg)
Oval white concave spectacle lens with bevelled edge
![Oval white convex spectacle lens with a grooved edge](https://coimages.sciencemuseumgroup.org.uk/307/499/large_thumbnail_smg00028096.jpg)
Oval white convex spectacle lens with a grooved edge
![Oval white concave spectacle lens with a grooved edge](https://coimages.sciencemuseumgroup.org.uk/307/500/large_thumbnail_smg00028097.jpg)
Oval white concave spectacle lens with a grooved edge
![Oval white double convex pebble spectacle lens with a grooved edge](https://coimages.sciencemuseumgroup.org.uk/307/471/large_thumbnail_smg00028092.jpg)
Oval white double convex pebble spectacle lens with a grooved edge
![Oval white double concave pebble spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/487/large_thumbnail_smg00028094.jpg)
Oval white double concave pebble spectacle lens
![Oval white meniscus convex pebble spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/479/large_thumbnail_smg00028093.jpg)
Oval white meniscus convex pebble spectacle lens
![Oval white meniscus concave pebble spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/462/large_thumbnail_smg00028089.jpg)
Oval white meniscus concave pebble spectacle lens
![White plano-convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/320/635/large_thumbnail_smg00032036.jpg)
White plano-convex spectacle lens
1905-1915
![White plano-concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/320/630/large_thumbnail_smg00032031.jpg)
White plano-concave spectacle lens
1905-1915
![White convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/463/large_thumbnail_smg00028090.jpg)
White convex spectacle lens
![White concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/464/large_thumbnail_smg00028091.jpg)
White concave spectacle lens
![Plano-concave cylinder 'chlorophylle' tint](https://coimages.sciencemuseumgroup.org.uk/307/459/large_thumbnail_smg00028086.jpg)
Plano-concave cylinder 'chlorophylle' tint
![Blue spherical- cylinder concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/460/large_thumbnail_smg00028087.jpg)
Blue spherical- cylinder concave spectacle lens
![Blue plano-cylinder concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/461/large_thumbnail_smg00028088.jpg)
Blue plano-cylinder concave spectacle lens
![Blue plano-cylinder convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/456/large_thumbnail_smg00028083.jpg)
Blue plano-cylinder convex spectacle lens
![Smoke plano-cylinder concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/458/large_thumbnail_smg00028085.jpg)
Smoke plano-cylinder concave spectacle lens
![Smoke plano-cylinder convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/457/large_thumbnail_smg00028084.jpg)
Smoke plano-cylinder convex spectacle lens
![Smoke spherical-cylinder convex spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/455/large_thumbnail_smg00028082.jpg)
Smoke spherical-cylinder convex spectacle lens
![Smoke spherical-cylinder concave spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/450/large_thumbnail_smg00028077.jpg)
Smoke spherical-cylinder concave spectacle lens
![Square white prism for correcting diplopia.](https://coimages.sciencemuseumgroup.org.uk/307/453/large_thumbnail_smg00028080.jpg)
Square white prism for correcting diplopia.
![Oval white convex bi-focal spectacle lens, 1845.](https://coimages.sciencemuseumgroup.org.uk/307/454/large_thumbnail_smg00028081.jpg)
Oval white convex bi-focal spectacle lens, 1845.
1845
![Oval white concave bi-focal spectacle lens with a ground edge](https://coimages.sciencemuseumgroup.org.uk/307/451/large_thumbnail_smg00028078.jpg)
Oval white concave bi-focal spectacle lens with a ground edge
1876
![Bi-focal spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/452/large_thumbnail_smg00028079.jpg)
Bi-focal spectacle lens
1900
![Bi-focal spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/448/large_thumbnail_smg00028075.jpg)
Bi-focal spectacle lens
1899
![Oval white 'Kryptok' fused bi-focal spectacle lens with ground edges](https://coimages.sciencemuseumgroup.org.uk/307/447/large_thumbnail_smg00028074.jpg)
Oval white 'Kryptok' fused bi-focal spectacle lens with ground edges
1904
!['Strubin' cemented bi-focal spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/449/large_thumbnail_smg00028076.jpg)
'Strubin' cemented bi-focal spectacle lens
1891
![White oval Bright's patent bi-focal spectacle lens with triangular segment](https://coimages.sciencemuseumgroup.org.uk/307/444/large_thumbnail_smg00028071.jpg)
White oval Bright's patent bi-focal spectacle lens with triangular segment
1912
Selected unworked slab of calculated lower density
Slab ground flat and shaped
Selected segment of calculated high density
Segment polished on curved face to required reading curve
Slab and segment fused by heat
Fused blank ground and polished
![Round white 'Kryptok' tonc bi-focal spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/445/large_thumbnail_smg00028072.jpg)
Round white 'Kryptok' tonc bi-focal spectacle lens
![Round white 'Kryptok' tonc bi-focal spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/446/large_thumbnail_smg00028073.jpg)
Round white 'Kryptok' tonc bi-focal spectacle lens
!['Kryptok' tonic bi-focal complete spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/441/large_thumbnail_smg00028068.jpg)
'Kryptok' tonic bi-focal complete spectacle lens
![Square 'Kryptok' fused slab and segment](https://coimages.sciencemuseumgroup.org.uk/307/442/large_thumbnail_smg00028069.jpg)
Square 'Kryptok' fused slab and segment
![Square 'Kryptok' fused slab and segment](https://coimages.sciencemuseumgroup.org.uk/307/443/large_thumbnail_smg00028070.jpg)
Square 'Kryptok' fused slab and segment
![Square 'Kryptok' fused slab and segment](https://coimages.sciencemuseumgroup.org.uk/307/438/large_thumbnail_smg00028065.jpg)
Square 'Kryptok' fused slab and segment
![Square 'Kryptok' fused slab and segment](https://coimages.sciencemuseumgroup.org.uk/307/440/large_thumbnail_smg00028067.jpg)
Square 'Kryptok' fused slab and segment
![Square 'Kryptok' fused slab and segment](https://coimages.sciencemuseumgroup.org.uk/307/439/large_thumbnail_smg00028066.jpg)
Square 'Kryptok' fused slab and segment
![Square 'Kryptok' fused slab and segment](https://coimages.sciencemuseumgroup.org.uk/307/435/large_thumbnail_smg00028062.jpg)
Square 'Kryptok' fused slab and segment
![Round 'Kryptok' fused slab and segment](https://coimages.sciencemuseumgroup.org.uk/307/436/large_thumbnail_smg00028063.jpg)
Round 'Kryptok' fused slab and segment
![Oval neutral or smoke parallel glass for preservers spectacles](https://coimages.sciencemuseumgroup.org.uk/307/437/large_thumbnail_smg00028064.jpg)
Oval neutral or smoke parallel glass for preservers spectacles
![Oval blue parallel glass for protectors spectacles](https://coimages.sciencemuseumgroup.org.uk/307/433/large_thumbnail_smg00028060.jpg)
Oval blue parallel glass for protectors spectacles
![Oval spectrum blue parallel glass](https://coimages.sciencemuseumgroup.org.uk/307/432/large_thumbnail_smg00028059.jpg)
Oval spectrum blue parallel glass
![Oval 'Chlorophylle' parallel glass](https://coimages.sciencemuseumgroup.org.uk/307/434/large_thumbnail_smg00028061.jpg)
Oval 'Chlorophylle' parallel glass
![Oval white bent glass for protectors spectacles.](https://coimages.sciencemuseumgroup.org.uk/307/431/large_thumbnail_smg00028058.jpg)
Oval white bent glass for protectors spectacles.
![Oval smoke or neutral tint](https://coimages.sciencemuseumgroup.org.uk/307/428/large_thumbnail_smg00028055.jpg)
Oval smoke or neutral tint
![Oval smoke or neutral tint](https://coimages.sciencemuseumgroup.org.uk/307/427/large_thumbnail_smg00028054.jpg)
Oval smoke or neutral tint
![Oval smoke or neutral tint bent glass spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/425/large_thumbnail_smg00028052.jpg)
Oval smoke or neutral tint bent glass spectacle lens
![Oval smoke or neutral tint bent glass spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/426/large_thumbnail_smg00028053.jpg)
Oval smoke or neutral tint bent glass spectacle lens
![Oval smoke or neutral tint bent glass spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/424/large_thumbnail_smg00028051.jpg)
Oval smoke or neutral tint bent glass spectacle lens
![Oval smoke or neutral tint bent glass spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/430/large_thumbnail_smg00028057.jpg)
Oval smoke or neutral tint bent glass spectacle lens
![Oval smoke or neutral tint bent glass spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/429/large_thumbnail_smg00028056.jpg)
Oval smoke or neutral tint bent glass spectacle lens
![Oval blue bent glass spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/423/large_thumbnail_smg00028050.jpg)
Oval blue bent glass spectacle lens
![Oval blue bent glass spectacle lens, pale tint.](https://coimages.sciencemuseumgroup.org.uk/307/420/large_thumbnail_smg00028047.jpg)
Oval blue bent glass spectacle lens, pale tint.
![Oval blue bent glass spectacle lens, medium tint.](https://coimages.sciencemuseumgroup.org.uk/307/421/large_thumbnail_smg00028048.jpg)
Oval blue bent glass spectacle lens, medium tint.
![Oval blue bent glass spectacle lens, medium tint.](https://coimages.sciencemuseumgroup.org.uk/307/422/large_thumbnail_smg00028049.jpg)
Oval blue bent glass spectacle lens, medium tint.
![Oval blue bent glass spectacle lens, bright tint.](https://coimages.sciencemuseumgroup.org.uk/307/417/large_thumbnail_smg00028044.jpg)
Oval blue bent glass spectacle lens, bright tint.
![Oval blue bent glass spectacle lens, dark tint.](https://coimages.sciencemuseumgroup.org.uk/307/418/large_thumbnail_smg00028045.jpg)
Oval blue bent glass spectacle lens, dark tint.
![Oval blue bent glass spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/419/large_thumbnail_smg00028046.jpg)
Oval blue bent glass spectacle lens
![Oval 'Chlorophylle' bent glass spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/414/large_thumbnail_smg00028041.jpg)
Oval 'Chlorophylle' bent glass spectacle lens
![Oval 'Chlorophylle' bent glass spectacle lens](https://coimages.sciencemuseumgroup.org.uk/307/415/large_thumbnail_smg00028042.jpg)
Oval 'Chlorophylle' bent glass spectacle lens
![Smoke or neutral tint glass for preserver spectacles](https://coimages.sciencemuseumgroup.org.uk/307/416/large_thumbnail_smg00028043.jpg)
Smoke or neutral tint glass for preserver spectacles
![D-shaped blue tint glass for preservers spectacles](https://coimages.sciencemuseumgroup.org.uk/307/413/large_thumbnail_smg00028039.jpg)
D-shaped blue tint glass for preservers spectacles
![D-shaped green tint glass for preservers spectacles](https://coimages.sciencemuseumgroup.org.uk/307/412/large_thumbnail_smg00028038.jpg)
D-shaped green tint glass for preservers spectacles
![English-made 'ladies' clip spectacles with oval lenses and shell plaquet](https://coimages.sciencemuseumgroup.org.uk/323/469/large_thumbnail_smg00032957.jpg)
English-made 'ladies' clip spectacles with oval lenses and shell plaquet
1890-1909
![Clip spectacles with a steel rim and oval lenses](https://coimages.sciencemuseumgroup.org.uk/382/948/large_thumbnail_smg00062403.jpg)
Clip spectacles with a steel rim and oval lenses
Ladies rimless clip spectacles with a steel rim and oval lenses
![Ladies rimless clip spectacles with tortoiseshell plaquets](https://coimages.sciencemuseumgroup.org.uk/382/952/large_thumbnail_smg00062407.jpg)
Ladies rimless clip spectacles with tortoiseshell plaquets
![Ladies rimless clip spectacles with cork plaquets](https://coimages.sciencemuseumgroup.org.uk/382/951/large_thumbnail_smg00062406.jpg)
Ladies rimless clip spectacles with cork plaquets
See more
Details
- Category:
- Optics
- Object Number:
- 1921-323
- type:
- spectacles
- credit:
- Dunscombe collection of spectacles