American Board of Opticianry Exam Prep 2025: NCLE and ABO Practice Questions

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ABO EXAM AND PRACTICE EXAM NEWEST 2025 TEST

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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

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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

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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

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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