. On the anomalies of accommodation and refraction of the eye, witha preliminary essay on physiological dioptrics. o be read off inmm. before the line. The pupil was always accurately measured atshort intervals, with the ophthalmometer, with perfectly equal illu-mination of the eye, the other being closed. Fig. 167, whose abscissmarks in days the total duration of the change of the pupil, in likemanner gives the diameters in the curve under ad. The diminution ofthe accommodation commences somewhat later than the dilatation ofthe pupil. The accommodation gradually returns after some days,togeth
. On the anomalies of accommodation and refraction of the eye, witha preliminary essay on physiological dioptrics. o be read off inmm. before the line. The pupil was always accurately measured atshort intervals, with the ophthalmometer, with perfectly equal illu-mination of the eye, the other being closed. Fig. 167, whose abscissmarks in days the total duration of the change of the pupil, in likemanner gives the diameters in the curve under ad. The diminution ofthe accommodation commences somewhat later than the dilatation ofthe pupil. The accommodation gradually returns after some days,together with the mobility of the pupil. Eig. 166 indicates by thecurve pp, the course of the absolute nearest point; by the curve r r,that of the farthest point. It will be seen that the latter undergoesscarcely any change; the nearest point, on the contrary, removesfrom the eye. This removal commences in from twelve to eighteen 586 MYDRIATICS AND THEIR ACTION. minutes after the instillation, is in twenty-six minutes, when the dila-tation is already nearly complete, still little remarkable; then rapidly, Fig. and subsequently slowly, proceeds, and attains its maximum in onehundred and three minutes after the instillation, when p and r coin-cide and the accommodation is therefore wholly removed. When,after forty-two hours, the pupil is somewhat smaller, a slight degreeof mobility has also returned, and, at the same time, some accommo-dation is to be observed, which now rather rapidly increases untilthe fourth day, but is not perfect until after the lapse of eleven observation was made on the eye of my assistant, Mr. Hamer,who has practised himself in very accurately determining his absolutenearest point at the maximum of convergence, while one eye is closed(compare p. 117).—Besides the results to be deduced from thefigures, we have still to remark:— * 1°. After the return of the accommodation with the third andfollowing days, the relative range of accommodation ha
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