No eyeballs free#
Micronutrients that destroy or neutralize free radicals, molecules that have been implicated as one causative factor in the stimulation of abnormal cellular reproduction (cancer) and cellular destruction (aging).Part of the eye anterior to the crystalline lens, including the cornea, anterior chamber, iris and ciliary body.Space between the cornea and the crystalline lens, which contains aqueous humor.Condition of the eyes in which they have unequal refractive power.Drainage area of the eye formed between the cornea and the iris, named for its angular shape, which is why you see the word "angle" in the different glaucoma names.Hand held chart featuring horizontal and vertical lines, usually white on black background, used to test for central visual field defects.If amblyopia is not treated before the age of 8, the visual deficit is usually permanent.
The conditions that most commonly cause amblyopia are eye misalignment (strabismus), a significant difference in spectacle prescription (refractive error) between the two eyes (anisometropia), or interruption of the light path of one of the eyes (by cataract, scar, tumor, etc.). Sometimes called a lazy eye, wherein one eye becomes dependent on the other eye to focus, usually developed in early childhood. Dullness or obscurity of sight for no apparent organic reason, therefore not correctable with glasses or surgery.Altitudinal defects occur in retinal vascular disease, glaucoma, and other disorders that affect the eye itself. The selective abnormality often creates a horizontal line across the visual field (known as "respecting the horizontal meridian"). This term describes a visual field defect in which either the upper or lower half of the visual field is selectively affected.Ability of the eye to change its focus between distant objects and near objects.The area of tissue that is removed during laser surgery.Surgical removal of tissue, typically using a cool beam laser.
Aberration are divided into two main categories: higher-order and lower-order. Distortions, related to astigmatism, that cause the inability of light rays entering the eye to converge (come together) to a single focus point on the retina.
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