[WHEN ARE EYEGLASSES TO BE WORN?].
D000065:Accommodation, Ocular; D005123:Eye; D005139:Eyeglasses; D006801:Humans; D012029:Refraction, Ocular; D012030:Refractive Errors; D014785:Vision, Ocular
ACCOMMODATION, OCULAR; EYEGLASSES; REFRACTION, OCULAR; REFRACTIVE ERRORS
WANN SOLL MAN EINE BRILLE TRAGEN?