. On the anomalies of accommodation and refraction of the eye, witha preliminary essay on physiological dioptrics. e figure is seen inverted, but it is here (Fig. 172) inverted, andtherefore gives the true form of the pupil for the left eye). c. Especially in the commencement of the contraction involuntaryspasmodic vibrations occur in the diameter of the pupil. d. The illumination of objects is feeble, with an unusual brownishtint (Bowman). The effect is similar to that of solar eclipses, inwhich, notwithstanding sunshine with its usual strongly contrastingshadows, the light is unusually feebl
. On the anomalies of accommodation and refraction of the eye, witha preliminary essay on physiological dioptrics. e figure is seen inverted, but it is here (Fig. 172) inverted, andtherefore gives the true form of the pupil for the left eye). c. Especially in the commencement of the contraction involuntaryspasmodic vibrations occur in the diameter of the pupil. d. The illumination of objects is feeble, with an unusual brownishtint (Bowman). The effect is similar to that of solar eclipses, inwhich, notwithstanding sunshine with its usual strongly contrastingshadows, the light is unusually feeble. If the instillation has beenperformed on only one eye, the great difference in illumination is bestseen on doubling the image by a prism (compare p. 133). e. The circles of diffusion of a point of light, situated beyond thedistance of distinct vision, become less the smaller the pupil is,and vision therefore becomes much less diffuse beyond the limits ofaccommodation. ACTION OF THE CALABAR BEAN. 613 f. After the disappearance of the myosis the pupil sometimes be-comes somewhat larger than before. Fig. The spasm of accommodation appears from the altered position bothof the farthest (Figs. 170 and 171 rr) and of the nearest (pp) pointof distinct vision, drawn above the absciss a a. The said curvesexhibit the whole course of both. We have, moreover, to note thefollowing:— a. In the determination of the farthest point clonic spasms ofaccommodation alternately arise, so that objects appear with the sameglass (at a distance) alternately distinct and diffused. Now thepoints of the curve r r correspond to the moments of relaxation. Inan hour after the employment of the myotic, the accommodation isagain completely under control. The curve rr shows further, thatwith a moderate dose, pain being virtually absent, the farthest pointhas still approached the eye from 56 to 7*3, that is to nearly two-thirds of the absolute range of accommodation, originally present. b. The determina
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