Which retinal layer is most radioresistant-
RPE
Layer of rods and cones
Bipolar cell layer
Ganglion cell layer
Rods and cones are the end organs of vision and are also known as photoreceptors. Layer of rods and cones containsonly the outer segments of photoreceptor cells arranged in a palisade manner. There are about 120 millions rods and 6.5 millions cones. Rods contain a photosensitive substance visual purple (rhodopsin) and subserve the peripheral vision and vision of low illumination (scotopic vision). Cones also contain a photosensitive substance and are primarily responsible for highly discriminatory central vision (photopic vision) and colour vision. Ref:comprehensive ophthalamology A k khurana 4/E pageno:250 Layer of rods and cones.
Vitreous and retina