Text-book of ophthalmology . 21), 1 Strabismi!*, from aTptfytiv, to turn. The term luscitas comes from luscus, squinting, and is atpresent used exoluaively for paralytic strabismus. From luscus is derived the French louche. DISTURBANCES OF MOTILITY OF THE EYE 737 that the visual axis, g, makes with the line of direction, r, which passesfrom the object to the retina through the nodal point of the eye, and whichgives the place of the retinal image, b. This deflection of the squintingeye is known as the primary deviation. While the patient keeps on looking at the object, o, a screen, S, isplaced
Text-book of ophthalmology . 21), 1 Strabismi!*, from aTptfytiv, to turn. The term luscitas comes from luscus, squinting, and is atpresent used exoluaively for paralytic strabismus. From luscus is derived the French louche. DISTURBANCES OF MOTILITY OF THE EYE 737 that the visual axis, g, makes with the line of direction, r, which passesfrom the object to the retina through the nodal point of the eye, and whichgives the place of the retinal image, b. This deflection of the squintingeye is known as the primary deviation. While the patient keeps on looking at the object, o, a screen, S, isplaced before the left eye (Fig. 322). Now the right eye takes up the taskof fixation, it being presupposed that it can be really brought far enoughto the right for this purpose. If now we look at the left eye behind thescreen we shall find it turned strongly inward—much more so, in fact,than the right eye had been previously. The deflection of the sound eyewhen covered, which is measured by the angle sh (Fig. 322), is called the. Fig. 321.—Primary Strabismic Deviation inParalysis of the Right External Rectus.
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