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Coats of the Eyeball

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Questions and Answers

What is the primary function of the cornea in the eyeball?

To refract light and contribute to the eye's refractive power (correct)
To sense light and transmit signals to the optic nerve
To regulate the amount of light entering the eye
To provide a white opaque layer

What is the function of the ciliary muscle in the eye?

To regulate the movement of the eyeball
To control the amount of light entering the eye
To change the shape of the lens and increase its refractive power (correct)
To produce aqueous humor

What is the name of the central depression in the macula lutea?

Optic disc
Blind spot
Fovea centralis (correct)
Macula lutea

What is the origin of the aqueous humor in the eye?

It is produced by the ciliary processes (A) Signup and view all the answers

Which nerve is responsible for supplying the sphincter pupillae muscle?

Oculomotor nerve (B) Signup and view all the answers

What is the name of the junction between the cornea and sclera?

Limbus (B) Signup and view all the answers

What is the consequence of obstruction to the draining of the aqueous humor?

Glaucoma with consequent blindness (D) Signup and view all the answers

What is the primary function of the ciliary processes?

To attach the lens to the circumference (C) Signup and view all the answers

What is the result of the ciliary muscle contracting during near reflex?

The lens assumes a more globular shape (A) Signup and view all the answers

What is the purpose of the constriction of the pupil during near reflex?

To ensure that light rays pass through the central part of the lens (A) Signup and view all the answers

What is the result of the aging process on the lens during presbyopia?

The lens becomes denser and less elastic and the ability to accommodate is lessened (D) Signup and view all the answers

What is the role of the vitreous body in the eye?

To contribute to the magnifying power of the eye (D) Signup and view all the answers

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