ABO Ocular Anatomy & Physiology

Question 1

Which structure of the eye is primarily responsible for focusing light at different distances?

Accepted Answer

Crystalline lens

Answer

Cornea

Answer

Iris

Answer

Vitreous humor

Question 2

What is the function of the ciliary body?

Accepted Answer

To produce aqueous humor and control lens accommodation

Answer

To produce vitreous humor

Answer

To drain aqueous humor from the eye

Answer

To protect the optic nerve

Question 3

Which layer of the cornea is primarily responsible for maintaining corneal transparency through its pump function?

Accepted Answer

Endothelium

Answer

Epithelium

Answer

Stroma

Answer

Bowman's layer

Question 4

Where are the cone photoreceptors most densely concentrated?

Accepted Answer

Fovea

Answer

Peripheral retina

Answer

Optic disc

Answer

Ora serrata

Question 5

What is the approximate refractive power of the human cornea?

Accepted Answer

43 diopters

Answer

20 diopters

Answer

60 diopters

Answer

10 diopters

Question 6

Which cranial nerve innervates the lateral rectus muscle?

Accepted Answer

Abducens nerve (CN VI)

Answer

Oculomotor nerve (CN III)

Answer

Trochlear nerve (CN IV)

Answer

Optic nerve (CN II)