Archives of ophthalmology and otology . which, in opposition to the former, showed a positive parallax in relationto the border of the pupil. On approaching the eye to within half an inch, the fundus could beseen with tolerable distinctness through either a concave ^ or a con- 384 D. Webster: vex -Jp, according as the observer looked through the centre or the peri-phery of the pupil. Examination by the indirect method showed a beautiful diplopia ofthe retinal vessels, both vertical and horizontal; and here, also, a paral-lax could easily be produced, the double-images being caused either toapp
Archives of ophthalmology and otology . which, in opposition to the former, showed a positive parallax in relationto the border of the pupil. On approaching the eye to within half an inch, the fundus could beseen with tolerable distinctness through either a concave ^ or a con- 384 D. Webster: vex -Jp, according as the observer looked through the centre or the peri-phery of the pupil. Examination by the indirect method showed a beautiful diplopia ofthe retinal vessels, both vertical and horizontal; and here, also, a paral-lax could easily be produced, the double-images being caused either toapproach or to recede from one another by slight movements of thehead or the objective lens. We now come to the anatomical cause of these remarkable phenomenain the refraction of the eye. On illuminating the eye by the obliquemethod and looking across the anterior chamber, we could distinctly seethe lens bulging forward at its centre in the form of a cone. Fig. 2shows the form of the anterior surface of the lens as accurately as Fig. 2. In analogy with the conical protrusion of the cornea, we have calledthis condition of the lens le?iticoftus. I may add that there was small posterior polar cataract, and that thewhole posterior capsule was dotted over with very minute opacities,radiating from the posterior pole of the lens. The optic disc appeareda little too white, and there seemed to be delicate changes in the retina,probably congenital. Case II.—Filamentoits Opacity in the Vitreous Chambers of the Eyes. ]\[iss M. H., 22, native of Ireland, applied to Dr. G. H. Bosley for re-lief from pain in her right eye, caused by a blow. Dr. Bosley sent her to Clinical Contributions to Ophthalmology. 385 Dr. Agnew for examination. It was found that she had never had anydefect of vision, or other trouble with her eyes, and that there were nophysical signs of inflammation, past or present, to explain the cause of theneuralgia for which she had sought advice, nor was there any histo
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