Eyeball

This anatomy tutorial covers the structure and function of the eyeball, focusing on its tunics, chambers, and additional structures. It begins with an overview of the topics, followed by detailed descriptions of the external, middle, and internal tunics, including the cornea, sclera, iris, ciliary body, choroid, and retina. The tutorial also explains the anterior and posterior chambers, highlighting their roles and associated pathologies. Finally, it discusses the optic nerve, lens apparatus, and related muscles, providing insights into their functions and clinical significance.

What is the primary function of the bulbar conjunctiva?

• To produce a large amount of tears

• To provide structural support to the eye

• To lubricate the eye and prevent microbial entry

• To control the amount of light entering the eye

Which part of the eye accounts for approximately two-thirds of its total optical power?

• The retina

• The lens

• The cornea

• The sclera

What is the primary function of the retina?

• To convert light into neural signals

• To protect the eye from dust

• To produce tears

• To control eye movement

Which cells in the retina are responsible for color vision?

• Rods

• Cones

• Bipolar cells

• Ganglion cells

What is the main role of the sclera?

• To control the size of the pupil

• To refract light

• To provide a protective outer layer

• To produce aqueous humor

Which structure is responsible for controlling the diameter of the pupil?

• The retina

• The iris

• The sclera

• The cornea

What is the function of the anterior chamber of the eye?

• To house the lens

• To produce aqueous humor

• To control the size of the pupil

• To provide a fluid-filled space between the cornea and iris

What is the role of the central retinal artery?

• To produce aqueous humor

• To control the movement of the eye

• To supply blood to the optic nerve fibers

• To supply blood to the cornea

Which muscle is responsible for moving the eye laterally?

• Medial rectus muscle

• Lateral rectus muscle

• Superior oblique muscle

• Inferior oblique muscle

What is the function of the vitreous body?

• To refract light

• To control the size of the pupil

• To maintain the shape of the eye

• To produce tears