ˈidioptrare. [f.Gr. ἴδι-ος peculiar + stem ὀπτ- as in ὀπτήρ one who looks, ὀπτός seen.] One who has some peculiarity of vision. 1833Whewell in Todhunter Acc. W.'s Wks. (1876) II. 153 The idiopt perceived scarcely any, if any, steady distinction between the two images.