Refractive Status Flashcards
farsighted refractive error in which the point of focus for rays of light from distant objects is behind the retina ( correctable with a convex lens ) plus lens - farsighted
Hyperopia
Nearsighted refers to refractive error in which the point of focus is in front of the retina eyes are in focus for near objects but cannot see a distant object clearly correctable with concave/ minus lens
Myopia
A distortion of the curvature of the cornea or asymmetry of the components of the eye such that rays from a single pt are not focused at a single point on the retina. Light falls on the retina distorted and meets at various distances in front or behind the retina. Light falls on the retina distorted and meets at various distances in front or behind retina
Astigmatism
Decreasing ability due to age of the lens of the eye to focus for near objects age related far sightedness plus lenses readers used to help
Presbyopia
Opthalmic device -plus lens compensates for this condtion
Hyperopia
A condition of unequal refractive status for the two eyes ( at lease 1 diopter difference in spherical) contacts may be better than glasses due to magnification differences glasses create.
Anisometropia
Minus is used to compensate for
Myopia
Minus is used to compensate for
Myopia
Cylindrical lenses are used for
Astigmatism
The condition in which both eyes have equal refractive power. If, for
Isometropia: