Open AccessTables for near vision examination in low vision patients
Author(s) -
Т. С. Егорова
Publication year - 2019
Publication title -
rossijskij oftalʹmologičeskij žurnal
Language(s) - English
Resource type - Journals
eISSN - 2587-5760
pISSN - 2072-0076
DOI - 10.21516/2072-0076-2019-12-1-86-91
Subject(s) - monocular , magnification , reading (process) , computer science , low vision , artificial intelligence , binocular vision , character (mathematics) , selection (genetic algorithm) , optometry , computer vision , test (biology) , monocular vision , ranging , mathematics , medicine , paleontology , telecommunications , geometry , political science , law , biology
Purpose : to design methods and algorithms of technical means selection for near visual work in low vision patients. We propose tables to measure near vision acuity ranging from 0.01 to 0.8, with test character sizes varying in logarithmic progression with 1.26 denominator. The tables help determine the minimal size of readable font = the reading threshold and magnification degree needed to ensure the reading of a normal font. To choose the optimal magnifier, a quantitative criterion was chosen — the reading rate. Due to these methods we were able to recommend the most effective technical means of rehabilitation for monocular or binocular use depending on the reading threshold, reading rate, the presence of ophthalmic pathologies and the patient’s age.