1. (n.) A lens of glass to assist the sight. Eyeglasses are used singly or in pairs.

2. (n.) Eyepiece of a telescope, microscope, etc.

3. (n.) The retina.

4. (n.) A glass eyecup. See Eyecup.

Polaroid glasses achromatic lens astigmatic lens bifocals blinkers burning glass camera cheaters coated lens colored glasses concave lens concavo-convex lens condenser contact lens convex lens dark glasses divided spectacles eyeglasses eyepiece glass glasses goggles granny glasses hand lens harlequin glasses horn-rimmed glasses lens lorgnette lorgnon magnifier magnifying glass meniscus mini-specs monocle nippers object glass objective objective prism ocular pair of glasses peepers prism quizzing glass reader readers reading glass reading glasses shades specs spectacles sun-specs sunglasses telephoto lens toric lens trifocals varifocal lens zoom lens