Choroid

Choroid Part of the middle coat of the eye which is a major source of blood supply. It is sandwiched in between the retina and sclera (see definitions this section).

Occipital Lobe

Occipital Lobe The final part of the visual pathway for vision. It is the part of the brain that does the “seeing.” It receive electrical impulses from the retina via the optic nerve. Strokes that involve the occipital lobe can cause blindness even though...

Conjunctiva

Conjunctiva A flimsy transparent membrane covering the outer part of the eye and the inner layer of the eyelids. In addition to protecting the eye, it secrets mucous to lubricate the eye and reduce friction between the eyelids and...

Photopsia

Photopsia A term meaning light flashes or the sensation of flickering of lights. It is a visual phenomena that is usually benign, but could be an early indication of a retinal tear or detachment. It is caused by shrinkage that occurs with the vitreous gel in the back...

Cornea

Cornea A clear membrane that lies in front of the iris (colored part of the eye) and pupil. It is commonly referred to as the “front of the eye.” It is literally the window to the eye and has tremedous focusing power for the eye. It determines 80% of the...

Presbyopia

Presbyopia A universal aging process that occurs in all people regardless of whether or not glasses were necessary as a child or during young adulthood. This is a loss of the ability to focus on near objects. It generally becomes evident during the 40’s and will...