NCLE Exam Latest Update 2023 Already Graded A+

annular bifocal contact - A lens with distance portion ground into the center of the lens and the near portion ground into the periphery aphakic lenses - lenses designed for post-cataract fitting apical zone of cornea - the central portion of the cornea with a constant radius of curvature. Also called the corneal cap. artificial tears - medications, many of them over the counter, to treat dry eyes aspheric lens - A non-spherical lens, in which the radii of curvature increase towards the periphery rather than remaining equal at all points. Aspheric lenses reduce optical aberration and improve resolution. bactericide - a chemical that disinfects and kills pathogenic organisms. benzalkonium chloride - a preservative used in contact lens solutions because of its germicidal qualities biomicroscopy - Ophthalmic examination of the eye by use of a slit lamp and a magnifying lens; also known as a slit-lamp exam. 10 to 50 times magnification bullous keratopathy - corneal edema with painful blisters in the epithelium due to corneal endothelial dysfunction. treated frequently with a therapeutic soft lens. Burton lamp - an ultraviolet light used to illuminate the fluorescein dye that is used to analyze the fit of a rigid contact lens. chord length - the straight-line measurement of the contact. lens diameter from edge to edge. circumcorneal injection - Redness around the limbus surrounding the cornea contact lens wetting angle - the angle between the liquid and the lens surface. contour lens - a tricurve lens designed to conform to the curvature of the cornea, which flattens as it extends in the periphery.