Sight without glasses
4 p. l., 5-162 p. illus., facism. 19 cm.
"Snellen exercise chart" laid in.
Eye - Diseases. Eye - Muscles. Eyeglasses.
4 p. l., 5-162 p. illus., facism. 19 cm.
"Snellen exercise chart" laid in.
Eye - Diseases. Eye - Muscles. Eyeglasses.