CONOID OPHTHALMIC LENSES IN LEGAL BLINDNESS.
D001766:Blindness; D005139:Eyeglasses; D006801:Humans; D007909:Lenses; D011932:Reading; D012029:Refraction, Ocular; D014787:Vision Tests; D014785:Vision, Ocular; D014794:Visual Fields
BLINDNESS; EYEGLASSES; LENSES; READING; REFRACTION, OCULAR; VISION TESTS; VISUAL FIELDS