NCLE Study Material TermsQuestions With Correct Answers

Strabismus - Answer Crossed eyes, muscle or refractive imbalance that prevent normal binocular vision. Photophobia - Answer Abnormal sensitivity to light Tropia - Answer Definite turning of an eye away from its normal position. May result from weak or damage ocular muscle Aniseikonia - Answer A relative difference in size and/or shape of the ocular images Amblyopia - Answer Lazy eye, vision that cannot be corrected to 20/20 with the aid of prescribed lenses Ciliary Muscle - Answer Controls the focusing or accommodation of the eye by changing the shape of the Crystalline Lens Thermal Disinfection - Answer Seldom used method of disinfection; lenses are boiled in saline solution Hydrogen Peroxide - Answer Lens soaked in 3% hydrogen peroxide solution of ten minutes, then stored in saline solution and catalyst for six hours. Following steps on usage is mandatory or may result in corneal pain and damage Saline - Answer Used to rinse and store contact lenses. Does NOT disinfection from bacteria. Cataract - Answer Any opacity of the crystalline lens Apical Zone of Cornea - Answer Central portion of the cornea with a constant radius of curvature. Diplopia - Answer Double Vision, perception of two images of single object. Lenticular Astigmatism - Answer Astigmatism found in the crystalline lens Residual Astigmatism - Answer Astigmatism remaining after the corneal astigmatism has been neutralized Irregular Astigmatism - Answer Caused by an irregularly shaped cornea. Can occur with Keratoconus or corneal scarring. Cannot be corrected with cylinders. Blepharitis - Answer Inflammation of the eyelid margins Chemosis - Answer Severe edema of the conjunctiva Double Slap-Off Lenses - Answer Used to stabilize toric lenses, also called thin-thick lenses. Endophthalmitis - Answer Inflammation of entire eye including outer coats Fuch's Dystrophy - Answer Edema in the stroma associated with scarring on both endothelium and epithelium Neovasularization - Answer The growth of new blood vessels on the cornea Hyperopia (farsightedness) - Answer A refractive error in which light rays entering the eye are focused behind the retina. An underpowered cornea Myopia (nearsightedness) - Answer A condition resulting from a refractive error in which light rays entering the eye are brought into focus in front of the retina. A cornea with too "power" Cornea - Answer the transparent layer forming the front of the eye. Keratometer - Answer instrument used to measure (the curvature of) the cornea (used for fitting contact lenses) Pterygium - Answer Benign growth of bulbar conjunctiva onto the cornea, may cause itchiness and irritations. Also known as Surfer's Eye, as it is related to overexposure to UV Subconjunctival Hemorrhage - Answer Broken blood vessels just below the surface of conjunctiva Giant Papillary Conjunctivitis - Answer Large bumps called papillae are seen on palpebrae (eyelids), causes can be over-wearing syndrome (OWS) or infection