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Small hole glasses were all the rage in the 1980s and 1990s and are still used by many people today. Small perforated lenses have been used in ophthalmology for a long time, acting as artificial pupils. There are two types of small aperture mirrors in the ophthalmic fitting box. One is 3 mm in diameter, close to the size of a normal human pupil in normal conditions. One is 1 mm in diameter. The former is used by the ophthalmologist to understand the nature and extent of refractive error; the latter is used to identify the cause of vision loss.
Jon Snow
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∙ 14y agoI don't know. But good quetion.
form Amya.
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How do you remove the lens from sunglasses?
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