The Orbit and Eye - Optha W1

What are the three main parts of the eye's fibrous layer?

Sclera, cornea, and muscle attachment.

What is the primary function of the ciliary body?

Controls the shape of the lens and secretes aqueous humor.

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

It nourishes the lens and cornea and maintains intraocular pressure.

What is the function of the iris?

Controls the diameter of the pupil.

What does the term 'macula' refer to?

The area in the retina with the greatest density of cones, responsible for sharp central vision.

What is the danger triangle of the face?

Area from upper lip to external nose that can allow the spread of infection to the cavernous sinus.

What cranial nerve is responsible for the function of the lateral rectus muscle?

CN VI (Abducent nerve).

What happens to the visual pathway when light from the right visual field is processed?

It is processed by the left primary visual cortex.

What are the main clinical tests for the extraocular muscles?

Testing the ability to move the eye in specific directions and isolating muscle movements.

What layer of the eye contains photoreceptors?

The retina.

What is the significance of the optic disc?

It is the point of entry/exit for blood vessels and axons of CN II, and corresponds to the blind spot.

What are the two segments of the eye and their main components?

Anterior segment (anterior and posterior chambers, lens) and posterior segment (vitreous body).

What role does the choroid play in the eye?

Provides nutrition and gas exchange to the retina.

What is the anatomical term for the angle where the iris meets the cornea?

Iridocorneal angle.

What is the main role of the superior oblique muscle?

To depress and intort the eyeball.

What results from the complete interruption of blood flow in the central artery of the retina?

Monocular blindness.