Lens and corpus ciliare

This tutorial covers the anatomy of the lens and ciliary body, focusing on their structures, functions, and clinical correlations. The lens is discussed in terms of its layers and role in accommodation, while the ciliary body is explored for its functions in lens anchoring, accommodation reflex, and humor secretion. The tutorial also addresses glaucoma, a condition affecting the ciliary body, and concludes with a summary of key points.

What is the primary function of the lens in the eye?

• To control the amount of light entering the eye

• To protect the eye from dust

• To focus light onto the retina

• To produce aqueous humor

Which part of the eye is responsible for changing the lens's shape during accommodation?

• Ciliary muscles

• Cornea

• Iris

• Retina

What is the lens capsule primarily composed of?

• Keratin

• Elastin

• Chitin

• Collagen

Which layer of the lens contains nucleated fibers?

• Lens capsule

• Lens fibers near the equator

• Lens fibers at the center

• Lens epithelium

What is the ciliary body also known as in Latin?

• Corpus luteum

• Corpus callosum

• Corpus albicans

• Corpus ciliare

Which part of the ciliary body is responsible for aqueous humor production?

• Corona Ciliaris

• Orbicularis ciliaris

• Posterior internal surface

• Anterior internal surface

What is the function of the outer pigmented epithelium in the ciliary body?

• To produce tears

• To absorb stray light

• To secrete hormones

• To protect against UV rays

Which layer of the ciliary body is involved in the drainage of aqueous humor?

• Stroma

• Ciliary muscle

• Superciliary layer

• Double layer of epithelial cells

What is a common risk factor for glaucoma?

• High cholesterol

• Diabetes

• Low blood pressure

• Young age

Which nerve innervates the ciliary body?

• Long ciliary nerve

• Facial nerve

• Vagus nerve

• Optic nerve