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本文所統計的盲目,乃指視力在一公尺数指(0.02)以下且不能矯正者。統計上之年齡,系指失明时之年齡。双眼盲者,以后一眼失明之年齡为准。
The statistics of this blind, refers to the visual acuity refers to the number of one meter (0.02) below and can not be corrected. The statistical age refers to the age of blindness. Blind eyes, a blind age later prevail.