. On the anomalies of accommodation and refraction of the eye, witha preliminary essay on physiological dioptrics. able it appears :— 182 MOVEMENTS OF THE EYE 1st. That in the emmetropic eye the centre of motion is situatedat a considerable distance (1*77 mm.) behind the middle of thevisual axis. 2nd. That in myopic individuals the centre of motion is situatedmore deeply in the eye, but also farther from the posterior surface,and indeed so that in the eyes of such persons the relation betweenthe parts of the visual axis, situated before and behind the centre ofmotion, is nearly the same as in
. On the anomalies of accommodation and refraction of the eye, witha preliminary essay on physiological dioptrics. able it appears :— 182 MOVEMENTS OF THE EYE 1st. That in the emmetropic eye the centre of motion is situatedat a considerable distance (1*77 mm.) behind the middle of thevisual axis. 2nd. That in myopic individuals the centre of motion is situatedmore deeply in the eye, but also farther from the posterior surface,and indeed so that in the eyes of such persons the relation betweenthe parts of the visual axis, situated before and behind the centre ofmotion, is nearly the same as in the emmetropic eye. 3rd. That in hypermetropic eyes the centre of motion is situatednot so deeply, but relatively very much closer to the posteriorsurface of the eye. In the above tables a column, f, is assigned to the angle betweenthe axis of the cornea and the visual line. The subjoined figures,—, representing an emmetropic; Pig. 93,a myopic; and Fig. 94, ahypermetropic eye,—are intended to illustrate the meaning of thatangle, and at the same time the position of the centre of motion d. Fig.
Size: 1879px × 1330px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookidonanomalieso, bookyear1864
