Which term refers to opacity of the crystalline lens that prevents light rays from entering the eye and refracting on the retina?
a. Myopia c. Cataract
b. Amblyopia d. Glaucoma
ANS: C
A cataract refers to opacity of the crystalline lens that prevents light rays from entering the eye and refracting on the retina. Myopia, or nearsightedness, refers to the ability to see objects clearly at close range but not at a distance. Amblyopia, or lazy eye, is reduced visual acuity in one eye. Glaucoma is a group of eye diseases characterized by increased intraocular pressure.
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Spinal vertebrae are separated from each other by:
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