00822cam a22002531 4500 sg 44000069 DLC 20260227112742.0 750904s1943 xx 000 0 eng sg 44000069 (OCoLC)1596355 DLC FMU DLC premarc RE925 .D87 1943 617.75 Dvorine, Israel, 1900- Theory and practice of analytical refraction and orthoptics, by Israel Dvorine...introduction by Emmett Albert Betts... Baltimore, Md. [Composed and printed at the Waverly press, inc.] 1943. xiii, 149 p. front. (port.) 23 cm. "Second edition." Bibliography: p. 148-149. Eye Accommodation and refraction. Orthoptics. 90347 90347