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Spectacles & Contact Lenses Adspecs and case, 1996

IMAGE number
UIS5082514
Image title
Spectacles & Contact Lenses Adspecs and case, 1996
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Location
Science Museum, London, UK
Medium
object
Image description

Spectacles & Contact Lenses Adspecs and case, 1996. A pair of adaptive spectacles invented by Joshua D Silver, professor of physics at Oxford University. Spectacles have been in use in the West for at least 700 years. The earliest had convex lenses, and were designed to beworn by people with long sight, to help them focus on nearby objects. Later, concave spectacle lenses were made for people with short sight. In 1784 Benjamin Franklin (1706-1790) invented 'bifocals' - spectacles split into two parts, each with a different focal length. Adaptive spectacles are designed to allow the wearer to manually adjust the power of each lens to their own requirements. ©SSPL/Science Museum

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SSPL/UIG / Bridgeman Images
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Largest available format 3504 × 2781 px 1 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB] Online Purchase
Large 3504 × 2781 px 297 × 235 mm 1.2 MB
Medium 1024 × 813 px 87 × 69 mm 792 KB

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