Artificial means for restoring vision

Abstract
In both conditions patients are visually impaired due to loss of photoreceptors. At present few treatments can remedy this and lead to recovery of vision.4 5 Photodynamic laser therapy has been beneficial in some patients with age related macular degeneration, but this therapy does not address photoreceptor loss. Different gene and drug therapies have been tried,4 5 but their ability to replace lost photosensitive tissue is limited. Researchers are therefore investigating the possibility of using prostheses to restore vision.