Anatomy & Physiology of the Eye

A 70-year-old man presents with gradual loss of central vision. Examination reveals accumulation of drusen between the retinal pigment epithelium and Bruch’s membrane.

A patient undergoes slit-lamp examination revealing loss of endothelial cells in the cornea. What function is most likely impaired?

A 34-year-old woman with double vision is found to have impaired adduction of the right eye. Which cranial nerve is affected?

A lesion at the optic chiasm would most likely produce which visual defect?

A 10-year-old boy presents with eye pain after being hit in the eye with a ball. The cornea is cloudy and edema is visible. Which layer is likely damaged?

Which extraocular muscle is primarily responsible for abduction of the eye?

The aqueous humor is produced by which structure in the eye?

Which part of the retina contains the highest concentration of cone photoreceptors?

A patient with ptosis and mydriasis likely has damage to which nerve?

What is the primary role of the pigmented epithelium of the retina?

A patient has difficulty looking downward and inward. Which muscle is likely affected?

Which part of the eye has the highest refractive power?

Which cranial nerve transmits visual information to the brain?

Which retinal layer contains ganglion cell axons that form the optic nerve?

The blood-retina barrier is formed by which two structures?

Which extraocular muscle intorts the eye?

Which layer of the retina is responsible for phototransduction?

A patient with sudden vision loss is found to have central retinal artery occlusion. What structure is immediately affected?

What is the function of the canal of Schlemm?

What is the embryological origin of the lens?

Which cranial nerve innervates the lateral rectus muscle?

Which structure focuses light onto the retina and can change shape?

The blind spot in vision corresponds to which ocular structure?

Which structure demarcates the anterior and posterior chambers of the eye?

Which photoreceptors are most responsible for night vision?

A patient with damage to the medial longitudinal fasciculus (MLF) would most likely present with what symptom?

The fovea is specialized for:

What structure suspends the lens in place?

Which structure regulates the amount of light entering the eye?

What is the role of melanin in the retinal pigment epithelium?

Where are the nuclei of retinal bipolar cells located?

Which muscle is responsible for elevation and extorsion of the eye?

The optic nerve exits the eye at which structure?

What type of vision do cones mediate?

The space between the iris and cornea is called:

Accommodation involves which of the following?

A lesion in the right optic tract results in:

What is the function of the retinal Müller cells?

The main function of the vitreous body is:

Which artery supplies the inner two-thirds of the retina?

Which structure is responsible for producing the lipid layer of the tear film?

Which eye layer provides the majority of structural strength to the globe?

The ora serrata represents the transition between:

Which type of photoreceptor is more numerous in the human retina?

The inner limiting membrane of the retina is formed by:

Which artery primarily supplies the choroid?

The limbus is the junction between:

The retinal layer closest to the choroid is:

The macula lutea is best described as:

Which structure contributes to accommodation in the eye?

Which layer of the retina contains horizontal cells?

The aqueous humor leaves the eye mainly through:

What separates the anterior and posterior segments of the eye?

Which glial cells support the optic nerve?

The optic nerve is surrounded by:

The middle coat of the eye is composed of:

Which part of the optic pathway is located between the optic chiasm and lateral geniculate nucleus?

The most metabolically active part of the retina is:

Which photoreceptors are sensitive to low-intensity light?

The anterior chamber angle is formed between:

Which muscle causes constriction of the pupil?

What is the name of the process by which the eye adjusts to different light levels?

The lens is avascular. How does it receive nutrients?

The posterior chamber lies between:

Where does light focus in a normal (emmetropic) eye?

Which cell type transmits signals from bipolar cells to the brain?

The junction between the conjunctiva and the cornea is called:

Which structure provides oxygen to the avascular cornea?

Which structure helps to maintain intraocular pressure?

A patient with impaired convergence likely has dysfunction in:

Which type of glial cell is unique to the retina?

What forms the outermost barrier of the cornea?

The optic radiation terminates in which brain region?

The main function of Bruch’s membrane is to:

What structure is most anterior in the eye?

Retinal detachment most commonly occurs between:

The function of the lens capsule is:

What is the function of the anterior epithelium of the lens?

The palpebral conjunctiva lines:

The visual axis passes through which retinal structure?

The retinal pigment epithelium (RPE) assists photoreceptor renewal by:

Which muscle is primarily responsible for downward gaze when the eye is abducted?

The majority of cone cells are concentrated in:

Which cranial nerve controls the superior oblique muscle?

Which structure lies directly anterior to the lens?

Which layer of the cornea is closest to the anterior chamber?

Which neurotransmitter is primarily involved in photoreceptor synaptic transmission?

The function of the ciliary epithelium includes:

What portion of the visual pathway crosses at the optic chiasm?

Which cells are the first-order neurons of the visual system?

Which cells in the retina modulate input from multiple photoreceptors to bipolar cells?

The parasympathetic pathway to the pupil originates from:

The primary refractive surface of the eye is:

Which cell type is responsible for night (scotopic) vision?

What is the role of Bruch’s membrane?

The highest density of ganglion cells is found in the:

The ciliary muscle contracts during:

What provides blood supply to the outer retina?

Which muscle is responsible for extorsion and elevation of the eye?

Which eye structure is transparent and avascular?

The aqueous humor flows from the posterior chamber into the anterior chamber through the:

Which component of the visual system is responsible for detecting motion?

The boundary of the retina posteriorly is:

Which part of the eye filters UV light and protects the retina?

The lacrimal gland receives parasympathetic innervation from:

The visual field is inverted and reversed on the:

What is the function of the zonular fibers?

A lesion of the right optic nerve causes:

The optic nerve is myelinated by:

Which fluid maintains eye shape and keeps the retina in place?

The corneal stroma is composed mostly of:

The junction between the iris and cornea that contains drainage structures is called:

The blood-retinal barrier is disrupted in:

The most important layer for maintaining corneal dehydration is:

Where is the visual pigment rhodopsin located?

Which eye structure is rich in melanin and helps prevent light scatter?

Afferent pupillary defect is most commonly caused by:

The anterior boundary of the vitreous body is:

The neural retina arises embryologically from:

The conjunctiva primarily functions to: