Basics of Ophthalmology for Dental Students

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33 Questions

Which part of the eye is responsible for admitting light into the eye and serving as the main refractive surface?

Cornea

Which structure forms the colored part of the eye and contains a central opening called the pupil?

Iris

What is the main function of the uveal tract in the eyeball?

Nutrition

The size of the eyeball is approximately:

24 mm in diameter

Which part of the outer coat of the eyeball is posterior, white, opaque, and tough?

Sclera

In what direction can the eyeball move due to the presence of extraocular muscles?

In all directions

Which part of the eye is pierced by the optic nerve?

Sclera

What is the diameter of the cornea?

$11$ mm

What is the main function of extraocular muscles?

To allow free movement of eyeball in all directions

Which layer of the eyeball is vascular, pigmented, and nutritive?

Uveal tract

What forms the main refractive surface of the eye?

Cornea

What is the most common cause of iridocyclitis due to localized eye disease?

Corneal ulcers

Which of the following is a symptom of iridocyclitis?

Blurring of vision

What is the treatment for iridocyclitis?

Local corticosteroid eye drops and ointment

What is the definition of optic neuritis?

Inflammation of the optic nerve

Which condition is characterized by rapid diminution of vision and pain with ocular movements?

Papillitis

What is the effect of oro-dental diseases on eye surgeries?

Lowering resistance of the eye to infections

What is the definition of glaucoma?

Increase in intraocular pressure with optic nerve head affection

What is a common symptom of acute primary glaucoma?

Colored haloes around lights

What causes retinal detachment?

Separation of the neurosensory retina from the underlying choroid

What is proptosis (exophthalmos)?

Protrusion of the eyeball forward

What is squint (strabismus)?

Condition where the two visual axes are not parallel in any direction of gaze

What causes orbital fractures?

Road traffic accidents, sports injuries, or civil violence

Which muscle is responsible for raising the eyelid?

Levator palpebrae superioris

What is the function of the choroid?

Highly pigmented and responsible for nutrition of adjacent structures

Which part of the eye is most responsible for night vision?

Peripheral retina

Which part of the eye is insensitive to light and is known as the 'blind spot'?

Optic disc

Which structure is responsible for secreting the aqueous humor to control intraocular pressure?

Ciliary body

What is the function of the lacrimal gland?

Produces tears to keep the ocular surface moist

Which part of the bony orbit separates the roof from the lateral wall?

Superior orbital fissure

What is the clinical presentation of orbital cellulitis?

Localized pain in the eye, proptosis, and limited eye movements

What causes orbital cellulitis?

Infection from oral cavity or dental infections

What is a typical symptom of phlyctenular kerato-conjunctivitis?

Ocular pain and light sensitivity

Test your knowledge of the basics of ophthalmology, including the anatomy of the eyeball, the function of the eye as the organ of sight, and its protection within the bony orbit. This quiz provides an overview of essential concepts for dental students.

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