Photoreceptor Impairment and Restoration on Optical Coherence Tomographic Image
Figure 1
Microperimetric map and spectral-domain optical coherence tomographic (SD-OCT) image of an eye with retinitis pigmentosa (42-year-old woman). (a) Microperimetric map image. A total of 24 stimulus locations covering the central 10° field were tested. The mean retinal sensitivity at the 24 locations is 17.3 dB. The best corrected visual acuity was 1.0. (b) SD-OCT image of a vertical scan. In addition to photoreceptor inner/outer segment (IS/OS) junction line, the external limiting membrane (ELM) and cone outer segment tips (COST) lines are clearly seen on the SD-OCT image. Red arrows indicate end points of the COST line. Blue arrows indicate end points of the IS/OS line and yellow arrows end points of the ELM line. The lengths of the COST, IS/OS, and ELM lines were computed at 2272, 4629, and 4930 μm, respectively. Note that the line length was the longest in the ELM, followed by the IS/OS and COST. The direction of photoreceptor impairment is from outside toward inside.
