Fig. 4.

Fifty-one-year-old man with RP initially treated by SDM RPT 2 years previously, without baseline perimetry. Visual acuity 20/200. After initial treatment the patient reported subjectively improved peripheral, night, and color vision. Fifteen months later the patient returned, reporting recurrent visual loss, in his left eye only, for 3–4 months. a ORP of the left eye that day demonstrating poor visual function. SDM was performed. One day following re-treatment, the ORP is improved by all measures. b Subjectively, the patient reported recovery of his prior level of visual function within a few hours of re-treatment. Chart visual acuity was unchanged at 20/200. BA6 best logMAR visual acuity within 6° of fixation; GMA global macular logMAR visual acuity