Exam 4 Review: Chapter 15: Vision Pathology
glaucoma - Any of a group of eye diseases, with a diminution of transparency, a bluish or greenish tinge of the refracting media of the eye, in which intraocular pressure increases to levels that cause compression of the retina and optic nerve; results in pain, hardening of the eyeball, and partial to complete loss of vision unless detected early.cataract - Clouding of the lens of the eye; often congenital or age-related; classified by the size, shape and location of the lesion and by the cause and time of occurrence; frequently corrected by surgery.
myopia - A condition in which visual images are focused in front of rather than on the retina; it results from the eyeball being too long from front to back or from an increased strength of the media of the eye; it is corrected by the use of a concave lens. nicknames nearsightedness and short sight.
hyperopia - An abnormal condition of the eye in which vision is better for distant objects than for near objects; it results from the eyeball being too short from front to back, causing images to be focused behind the retina; this condition is easily corrected with eyeglasses or contact lens. aka farsightedness, hypermetropia.
astigmatism - A condition in which unequal curvatures in different parts of the lens (or cornea) of the eye which prevents light rays from focusing clearly at one point on the retina, leading to blurred vision.
Meet an amazing blind boy who gets around
using his acute hearing!
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