Figure 1.
The measurement of the curvature of the eyes with retinitis pigmentosa (RP) and control eyes. (a) An optical coherence tomography (OCT) image of an 84−year−old man with RP. The axial length is 27.16 mm. The line of retinal pigmented epithelium (RPE) was marked with red points at an interval of 200 µm. (b) An OCT image of the control group. The left eye of an 84−year−old man was examined. The mean axial length of the eye was 27.37 mm. The RPE line is marked in the same manner as in (a). (c) The curvature of the eye was fitted using NIH Image J software (ver. 1.54g). Coefficient a represents the steepness of the eye and is 9.0 × 10−4. (d) The curvature of the eye is flat, and coefficient a is 1.0 × 10−4.