trial frame
Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.
tri·al frame
a type of spectacle frame with variable adjustments, for holding trial lenses during refraction.
tri·al frame
(trī'ăl frām)A type of spectacle frame with variable adjustments, for holding trial lenses during refraction.
trial frame
An eyeglass frame for holding trial lenses while a person is being fitted for glasses.
See also: frame
trial frame
Spectacle frame with variable adjustments for interpupillary distance, side length, etc. in which each lens rim is fitted with a number of cells into which trial lenses can be placed when testing vision (Fig. T18). See phoropter; Simultantest.