Structure of the Eyeball

Name the 3 layers of the eyeball.

The average human eye can see around ​ (a)   different shades of color and has a resolution that equals ​ (b)   gigapixels.

• 100
• 576
• 12
• 56
• 200
• 1080
• 728
• 7

The posterior pole of the eyeball is connected with the __________, which conveys the information from the retina to the brain.

• optic nerve (CN II)

• oculomotor nerve (CN III)

• olfactory nerve (CN I)

• ear canal

The _________ layer of the eyeball consists of the sclera and cornea.

• fibrous

• vascular

• nervous

• dermal

The ______ layer, also known as the uvea or uveal tract, consists of the choroid, ciliary body, and iris.

• fibrous

• vascular

• nervous

• dermal

The _________ layer, which is the innermost layer of the eyeball, is also known as the retina.

• fibrous

• vascular

• nervous

• dermal

The inside of the eye contains the two refractive structures of the eye called the ​ (a)   and ​ (b)   .​

• lens
• vitreous body
• cornea
• sclera
• optic nerve
• aqueous humor
• Tenon's capsule

What is the function of Tenon's capsule?

True or false: The cornea is a completely avascular structure, meaning that it doesn’t receive arterial blood supply.

• True

• False

What is the main function of the cornea?