Biological Considerations for an Intraocular Retinal Prosthesis - Artificial Sight: Basic Research, Biomedical Engineering, and Clinical Advances - page 11

Retina
RPE and
choroid
Figure 1.11. OCT showing normal fovea (top) and a fovea with subretinal fluid
(arrowhead) which has resulted in separation of the retina from the RPE and choroid
(bottom).
Figure 1.12. OCT showing a retinal array in contact with the retina at each end (short
arrows) but slightly elevated in the middle (long arrow).
under the eyelids (Figure 1.13). Light stimulation is performed under both
bright (photopic) and dark (scotopic) background conditions to induce a retinal
response. A diseased retina may alter the shape of the waveform; in some
conditions (such as severe retinitis pigmentosa) the Electroretinogram (ERG)
becomes flat, i.e. an “extinguished” electrical response. Because the ERG is