| 释义 |
optotype|ˈɒptəʊtaɪp|
[f. opto- + type. First formed as mod.L. optotypus (H. Snellen 1875, in Klin. Monatsbl. f. Augenheilkunde XIII. 479).]
A type or letter of definite size used for testing acuteness of vision; a test-type.
[1886C. M. Culver tr. Landolt's Refraction & Accomm. of Eye iii. 229 These tables of type figures, ‘optotypi’, as Snellen calls them, are what we use in optometry.] 1892in Syd. Soc. Lex. 1905Trans. Amer. Ophthalm. Soc. X. 648 Attempts have been made..to construct special optotypes adapted to the limited capacity and observing powers of young children and illiterates. 1963Arch. Ophthalm. LXX. 113/2 Amblyopic eyes required more light to read optotypes than did normal eyes. 1970A. H. Keeney Ocular Exam. iii. 29/1 Letters and numbers in the patient's own language most closely relate to his daily seeing requirements and therefore are the most practical optotypes. |