Corrected by a cylindrical (toric) eyeglass or contact lens.īandage lens. Usually results from corneal asphericity. Instead, light rays form two focal lines separated by a focal zone. Light rays entering the eye are bent unequally by different meridians, with maximum and minimum powers 90 degrees to one another, which prevents formation of sharp point focus on the retina. Optical defect in which refractive power is not uniform in all directions (meridians). Fluid-filled space inside the eye between the iris and the innermost corneal surface (endothelium).Īstigmatism (uh-STIG-muh-tiz-um). Usually uncorrectable by optical means (e.g., eyeglasses).Īnterior chamber (AC).
Decreased vision in one or both eyes without detectable anatomic damage in the eye or visual pathways. The discharge contains a large number of white blood cells (eosinophils).Īmblyopia (am-blee-OH-pee-uh), "lazy eye." Functional Defect. Characterized by discharge, itching, irritation, swelling, tearing, redness, and light sensitivity. Hypersensitivity of the conjunctiva (membrane covering white of eyes and inner lids) to foreign substances.
Most common cause of decreased vision after age 60.Īllergic conjunctivitis. Two general types: "dry," which is usually evident as a disturbance of macular pigmentation and deposits of yellowish material under the pigment epithelial layer in the central retinal zone "wet," (sometimes called Kuhnt-Junius disease) in which abnormal new blood vessels grow under the retina and leak fluid and blood further disturbing macular function. Group of conditions that include deterioration of the macula, resulting in a loss of sharp central vision. Scraped area of corneal surface accompanied by loss of superficial tissue (epithelium).Īge-related macular degeneration (AMD, ARMD) (MAK-yu-lur), macular (or) senile macular degeneration. The Eye Medical Center is happy to provide you with a list of terms in order for you to keep informed.Ībrasion, corneal abrasion.
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