Anatomy of the Eye

This tutorial by Peter from Anatomy Zone covers the anatomy of the eyeball, detailing its three main layers: fibrous, vascular, and inner. The fibrous layer includes the sclera and cornea, providing shape and support. The vascular layer consists of the choroid, ciliary body, and iris, which nourish the retina and control lens shape and pupil size. The inner layer, the retina, detects light and includes the macula and optic disc. The tutorial also discusses the eye's fluid chambers and the importance of aqueous humor drainage to prevent glaucoma.

What is the primary function of the eyeball?

• To support the facial skeleton

• To house structures responsible for vision

• To produce tears

• To regulate body temperature

Which part of the fibrous layer is responsible for refracting light entering the eye?

• Sclera

• Cornea

• Iris

• Retina

What is the main role of the extraocular muscles?

• To move the eye

• To control the shape of the lens

• To detect light

• To produce aqueous humor

Which structure in the vascular layer provides nourishment to the retina?

• Ciliary body

• Choroid

• Sclera

• Iris

What happens to the lens when the ciliary muscle contracts?

• The lens becomes more rounded

• The lens detaches

• The lens becomes opaque

• The lens becomes flatter

Which part of the eye is responsible for giving it color?

• Retina

• Cornea

• Iris

• Lens

What is the function of the fovea centralis in the retina?

• To nourish the cornea

• To provide high acuity color vision

• To produce tears

• To regulate pupil size

What is the 'blind spot' of the retina?

• The optic disc

• The macula lutea

• The choroid

• The fovea centralis

What condition is caused by the obstruction of aqueous humor drainage?

• Glaucoma

• Astigmatism

• Myopia

• Cataracts

Where is the vitreous humor located in the eye?

• In the posterior chamber

• In the vitreous chamber

• In the anterior chamber

• Between the cornea and iris