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Terminology Quiz 2
Question | Answer |
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Asthenopia | Vague eye discomfort arising from use of the eyes. May consist of eye strain, headache, and/or browache. May be related to uncorrected refractive error or poor fusional amplitude. |
Astigmatism | Inability of the eye to focus sharply (at any distance), usually resulting from a spoon-like (toric) shape of the normally spherical corneal surface. |
Atrophy | Wasting away or loss of function of cells, tissue, or an organ |
Bedewing | Swelling and clouding of superificial layers of the cornea, causing loss of surface smoothness, which reduces its image-forming properties. May be caused by prolonged increase in intra-occular or by contact lens over-wear. |
Binocular Vision | Blending of the separate images seen by each eye into one composite image. |
Blepharitis | Inflammation of the eyelids, usually with redness, swelling, and itching. Many causes e.g. infection/allergy |
Blepharoconjuctivitis | Inflammation of the conjunctiva |
Blepharoplasty | Any plastic surgery of the eyelids, usually cosmetic |
Blepharoptosis | Drooping of the upper eyelid. May be congential or caused by paralysis or weakness of 3rd (oculumotor) cranial nerve, or sympathetic nerves, or by the excessive weight of the upper lids. |
Blepharospasm | Sudden, involuntary spasm of the orbicularis oculi muscle, producing uncontrolled blinking. |
Blindness | Inability to see |
Bulbar | Refers to the eyeball |
Canaliculus | Tiny channel in each eyelid that forms part of the tear drainage system. |
Canthus | Angle formed by the inner or outer junction of the upper and lower eyelids. |
Caruncle | Pink, fleshy conjuctival tissue in the nasal corner of each eye over the semilunar fold. |
Cataract | Opacity or cloudiness of the crystalline lens, which may prevent a clear image from forming on the retina. |
Central Visual Acuity | Eyes best vision, used for reading and distinguishing detail and color. |