FIGURE 7.

Comparisons of electroretinographic (ERG) amplitude vs light intensity at 2, 4, 6, and 8 weeks after surgery. The lines are the average dark-adapted intensity series amplitudes in each treatment group. No significant differences are seen at 2 weeks postoperatively. At 4 and 6 weeks after surgery, significantly larger ERG responses to the higher-intensity flashes are present in the active-implant animals but dissipate by 8 weeks. Note the change in amplitude scales between panels (n = 13 active-device, 4 inactive-device, 5 sham surgery, and 4 unoperated eyes). Reprinted with permission from the Association for Research in Vision and Ophthalmology.⁷¹