maandag 12 januari 2015

Iris 338

Having to switch glasses constantly must have been an inconvenient for the first owner of these Sferoflex glasses. My collection hosts about a dozen cataract glasses and three of these have bifocal lenses. One pair has a bifocal lens and the other lens is single vision. It was probably a matter of weighing the pros and cons between one pair of bifocals and switching two single vision pairs.

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