EYEGLASS

eyeglass. Eyeglass, n. a glass used to hep the sight, in telescopes, the glass next to the eye

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Eye″glass′ (?), n. 1. 1. A lens of glass to assist the sight. Eyeglasses are used singly or in pairs.
2. 2. Eyepiece of a telescope, microscope, etc.
3. 3. The retina.
4. 4. A glass eyecup. See Eyecup.