Stereoscopic Treatment of Heterophoria And Heterotropia Designed to Accompany T
Stereoscopic Treatment of Heterophoria And Heterotropia Designed to Accompany T
David Washburn Wells
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46 STEREOSCOPIC TREATMENT OF For homework after the patient has ceased his regular visits, two or three dozen of such photos, selected by him, are marked in this way, the dots being made as small as possible.. He is thus taught to appreciate the absolute reproduc- FIG. 16. DB. CROSS' STEREOSCOPIC ATTACHMENT FOR HMI EXERCISING. tion of natural scenery, and is constantly able to verify his binocular perception by a glance at the dots. It is advisable to insist upon good photo- graphs properly mou...nted. The H. C. White Company, of Bennington, Vt. , offer a fine selec- tion of views from all parts of the world. HETEROPHORIA AND HETEROTROPIA. 47 Cross, of Worcester, Mass. , has devised a cylinder with 13 facets, on which he has pasted the 13 cards of series H. This is mounted on the Holmes stereoscope, arranged with a ratchet so that the patient can turn up one after the other of the cards, progressing in either direction. If, as some think, it is wiser to have a period of relaxation between the repeated efforts of con- vergence, Cross suggests that patient's eyes may be closed while the cylinder is being revolved.
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