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List of Illustrations
Vision Care Is Here
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achromatic doublet adjustment alignment American Optical Company angle aphakic astigmatism back surface Balgrip base curve base-apex line Bausch & Lomb bend bevel blank bridge cataract chart concave convex corrected curve crown glass cutting cylinder axis cylinder form cylinder power decentration distance portion doctor drill edger effective power endpiece example eyewear eyewires finished lens fitting flint glass frames and mountings front surface fused bifocal geometric center grinding index of refraction inserted kryptok length lens arms lenses lensometer light major lens manufacturers marked measurement millimeters minus cylinder minus lens nose Numont ophthalmic optical center pads Panoptik pantoscopic tilt plane plastic frames pliers position power wheel prescribed prescription prism diopters prism power protractor pupillary distance rays reading level refractive index rimless mountings rotation round segment Shuron single vision spectacles sphere power spherical strap surface power target temple Tillyer toric Trifocal Ultex Univis Verify vertex vertical Vertometer wear