Mo Kwong mobile refraction service.
D000293:Adolescent; D000367:Age Factors; D002648:Child; D005139:Eyeglasses; D005260:Female; D006723:Hong Kong; D006801:Humans; D008297:Male; D008952:Mobile Health Units; D009907:Optometry; D012030:Refractive Errors / Q000453:epidemiology / Q000628:therapy