e/Coddington magnifier

Information
has gloss	eng: A Coddington magnifier is a magnifying glass consisting of a single very thick lens with a central deep groove diaphragm at the equator, thus limiting the rays to those close to the axis, which again minimizes spherical aberration. This allows for greater magnification than a conventional magnifying glass, typically 10× up to 20×. Most single lens magnifiers are limited to 5× or so before significant distortion occurs. The drawback is that the diaphragm groove reduces the area seen through the magnifier.
lexicalization	eng: Coddington magnifier
instance of	(noun) a transparent optical device used to converge or diverge transmitted light and to form images lens, lens system, lense