Blindness, low vision, and color blindness.
失明、视力低下，和色盲。
Screen magnifiers that enlarge information on the screen for people with low vision.
屏幕放大器（Screen magnifier）为视力低下的人放大屏幕上的信息。
Objective: To provide a visual acuity chart for Chinese low vision patients.
目的：研制一种适合我国眼科临床使用的低视力对数视力表。
Objective: To investigate the effect of low vision devices used in low vision clinic.
目的：探讨助视器在儿童低视力门诊的应用效果。
Objective: To investigate the effect of low vision devices used in low vision clinic.
目的：探讨助视器在儿童低视力门诊的应用效果。
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