Closed-circuit television as an electronic visual aid.
Sun
B C
BC
Wei
L N
LN
Gao
Y Q
YQ
Zhang
S T
ST
Zou
L H
LH
Yan
S
S
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001296:Audiovisual Aids; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009896:Optic Atrophy / Q000150:complications; D011932:Reading; D013690:Television / Q000295:instrumentation; D015354:Vision, Low / Q000209:etiology