ABO Practice Exam Questions and Answers Exam with correct Answers

ABO Practice Exam Question Set | Verified Answers A+ Rated The extra-ocular muscles are inserted into the sclera and serve to rotate the eye in all possible directions. There are _______of these muscles. - answer - Six The fibrous tunic is comprised of the: - answer - Sclera and cornea Fusion occurs: - answer - In the brain The aqueous fluid is continually being manufactured by: - answer - The ciliary body The ability of the eye to bring objects of varying distances to focus on the retina is known as: - answer - Accommodation When accommodation is at rest, rays of light from a distant source come to focus behind the retina. This condition is known as: - answer - Hyperopia Impulses are carried from the retina to the brain along the: - answer - Optic nerve That area of the retina capable of perceiving the greatest amount of detail is: - answer - Fovea centralis The average cornea has a refractive power of approximately: - answer - 43 diopters The layer of the cornea which is highly regenerative is: - answer - The epithelium Night vision is chiefly a function of the: - answer - Rods A tendency of the visual axis to deviate inward while the eyes are in a position of rest is known as: - answer - Esophoria A "farsighted" eye is one that is: - answer - Hyperopic The term used to indicate "double vision" is: - answer - Diplopia The condition in which the ability to accommodate for near vision becomes inadequate because of loss of elasticity of the crystalline lens is called: - answer - Presbyopia When there is a loss of vision without any apparent disease of the eye it is known as: - answer - Amblyopia A refractive error in which the rays of light do not come to a single point of focus is called: - answer - Astigmatism The condition in which the crystalline lens of the eye gradually loses its transparency with consequent loss of visual acuity is known as: - answer - Cataract An ocular disease having as its primary characteristic a sustained increase in intraocular pressure. - answer - Glaucoma The space between the front of the iris and the innermost portion of the cornea (the endothelium), this space is filled with aqueous. - answer - Anterior chamber A tendency of one eye to deviate upward is: - answer - Hyperphoria The layer of the cornea which comprises ninety percent of its thickness is: - answer - The stroma A condition in which the refractive error of one eye significantly differs from that of the other and where both eyes have the same sign (i.e. both eyes are myopic or hyperopic) is known as: - answer - Anisometropia The refractive error which results in two points of focus falling behind the retina is: - answer - Compound hyperopic astigmatism The refractive condition caused by a damaged cornea so that rays of light come to many focal points on the retina is known as: - answer - Irregular astigmatism The index of refraction of the crystalline lens is: - answer - 1.42 The index of refraction of the cornea is: - answer - 1.37 Myopia means the eye A. is nearsighted B. has distance blur C. requires a (-) minus lens D. all of the above - answer - D. all of the above The Retina contains A. lab tools B. lens information C. light receptors D. understock of frames - answer - C. light receptors Hyperopic people have difficulty seeing A. distance objects B. near objects C. everything D. nothing - answer - B. near objects How many ranges of vision do bifocals provide? A. one B. Three C. Two D. Infinite - answer - C. Two The top portion of a bifocal allows wearers to see: A. objects in the distance B. a & c C. objects beyond arm's length D. objects up to 18 inches - answer - B. a & c Characteristics of a plus (+) lens include: A. thin center B. minifies objects C. converges light rays D. corrects myopia - answer - C. converges light rays Polycarbonate lens material is: A. heavy B. tintable C. most impact resistant material D. totally scratch resistant - answer - C. most impact