Visual symptoms depend on where the blood vessel changes are taking place in your eye s retina. Glaucoma - fluid that does not properly drain causes pressure within the eye that can damage the optic nerve and lead to vision loss. Glaucoma affects side vision before central vision is affected. Optic atrophy - a degeneration of the optic nerve, the fibers that transmit electrical information from the retina to the brain where it is translated into vision, that leads to loss of clarity or changes in the field of vision, or both. Retinitis pigmentosa - a hereditary eye disorder causing gradual destruction of the retina.
Sight loss is usually gradual but progressive.
Vision Care Professionals Ophthalmologist a medical doctor trained in vision and eye diseases who is licensed to perform surgery on the eyeball. Individuals with serious vision problems need to see their ophthalmologist regularly to insure their condition does not become more severe. Optometrist - trained in vision and eye diseases and can prescribe corrective lenses and diagnose eye diseases, but do not perform surgery. Optician - a technician who makes and fits corrective lenses. Rehabilitation Terms Functional vision exam - an exam by a low vision specialist that determines the extent of a person s remaining sight.