Word: lensed
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∙ CATARACTS. Despite striking technical advance in recent years, eye surgeons are still haunted by the fear that during removal of a cataract the casing of the lens will break and spill some of its contents into the eyeball. Several ophthalmic surgeons are now using an especially small probe (cryostylet...
Less than Graceful. Credit for the change goes mostly to such improvements as the corneal lens, made of Plexiglas, which is lighter and simpler to fit than the old soleral variety, covers only the iris and the pupil rather than the whole eye. Researchers are adapting other materials, notably a...
Nonetheless, life for the contact wearer is still far from rose-colored. Cost of fitting the lenses (after an average of six sittings) ranges from $150 to $300. Then there is the matter of removing them, a highly complicated process involving a series of postures (feet planted firmly on the floor before the mirror, back hunched, one palm cupped below the eye, the other fanned out beside it) that might seem the essence of grace in a Kabuki dancer but stir less enthusiasm when performed in a crowded ladies' room, look downright insane in a restaurant. Worse still...
...quite another matter. On a basketball court, where a simple shout of "Contact!" is enough to bring everything to a halt these days, or on a crowded dance floor, where couples scrambling among the fruggers' feet have become as essential as crepe paper at any successful prom, lost lenses simply disappear. Otherwise, they get wafted down drains, into swimming pools, off ski slopes. They are lodged between the pages of books, the coils of radiators, the seats in movie houses, never again to be seen or to afford sight. Moreover, the new lenses easily get stuck, one inside...
...tough, clear plastic bag which, filled with water, makes a big and satisfying magnifying glass. The same company also devised a three-legged stool whose height is equal to the focal length of a giant lens in the middle of the seat, a triangular wood box with three peephole lenses for viewing an object's change in size, and a merry-go-round of mirrors that reflect other mirrors and spy around corners. A set of colored Plexiglas paddles demonstrates the effect of combining primary colors. A different sort of distinction is taught with perception plaques: twelve pairs...