[APROPOS OF ORTHOPTICS FOR SUBJECTS WITH SEVERE VISUAL DEFECTS].
D001766:Blindness; D006801:Humans; D009988:Orthoptics; D012030:Refractive Errors; D014787:Vision Tests; D015354:Vision, Low
BLINDNESS; ORTHOPTICS; REFRACTIVE ERRORS; VISION TESTS
ZUM PROBLEM DER BESCHULUNG HOCHGRADIG SEHGESCHAEDIGTER.