. On the anomalies of accommodation and refraction of the eye, witha preliminary essay on physiological dioptrics. Fig. torily convince ourselves. Thus if we cause the axis of vision to beas strongly as possible directed outwards, we shall observe the slowalteration of the arching of the oval myopic, and the rapid change ofthe direction of the arching in the anteriorly situated equator of thehypermetropic eye. Moreover, the other axes of the myopic eyeappear to be longer, while those of the hypermel ropic arc shorter thanthose of the emmetropic eye. Myopia and hypermetropiamight also be s
. On the anomalies of accommodation and refraction of the eye, witha preliminary essay on physiological dioptrics. Fig. torily convince ourselves. Thus if we cause the axis of vision to beas strongly as possible directed outwards, we shall observe the slowalteration of the arching of the oval myopic, and the rapid change ofthe direction of the arching in the anteriorly situated equator of thehypermetropic eye. Moreover, the other axes of the myopic eyeappear to be longer, while those of the hypermel ropic arc shorter thanthose of the emmetropic eye. Myopia and hypermetropiamight also be supposed to be dependenton many other causes. Anomalies of refraction mighl depend uponthe curvature of the diifereni refracting surfaces (compare p. 88), aswell as on the relative coefficients of the refraction of light. Theorieshave not, been wanting in reference to this subject. The opinion has in the first place been rather generally enter-tained, that in myopia the cornea is more convex. So far as hyper-metropia was known, it was supposed to be connected with too greatflatness of the cornea, which was positively as
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