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16 Questions

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Eyelid Structure

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Questions and Answers

What is the primary function of the eyelids in regards to vision?

To distinguish between different colors

To focus light

To control light entry and improve distance vision depth of field (correct)

To detect minor injuries

What is the gap or aperture between the eyelids called?

Conjunctival fold

Lacrimal duct

Tarsal plate

Palpebral fissure (correct)

What is the outermost layer of the eyelids composed of?

Sclera

Cornea

Skin (correct)

Conjunctiva

What is the name of the fold of skin present in young occidentals and young and old Asians?

Epicanthal fold Signup and view all the answers

What is the term for the point of attachment of a tendon or ligament onto the skeleton or other part of the body?

Insertion Signup and view all the answers

What is the term for the part of the eyelid that overlaps the cornea?

Edge of upper eyelid Signup and view all the answers

What is the main function of the tarsal (meibomian) glands in the eyelid?

To produce an oily secretion that prevents the movement of aqueous tears onto the lid skin Signup and view all the answers

What is the function of the orbicularis oculi muscles in the eyelid?

To close the palpebral fissure by contracting like a sphincter Signup and view all the answers

What is the name of the muscle that inserts directly into the upper edge of the superior tarsal plate?

Superior tarsal muscle (Müller's muscle) Signup and view all the answers

What is the name of the condition where the eyelid droops due to problems with the levator muscle?

Ptosis Signup and view all the answers

What is the name of the part of the conjunctiva that lines the inner eyelids and the bulbar?

Palpebral conjunctiva Signup and view all the answers

What is the function of the conjunctiva in the eye?

To provide immunological defence and produce the mucus component of the tear film Signup and view all the answers

What is the name of the structure that the levator muscle is attached to in the orbit?

Sphenoid bone Signup and view all the answers

What is the name of the condition where the eyelashes scratch the cornea due to chronic overreaction of the preseptal orbicularis muscle?

Entropion Signup and view all the answers

What is the name of the muscle that inserts into the lower edge of the inferior tarsal plate?

Inferior tarsal muscle Signup and view all the answers

What is the name of the part of the conjunctiva that contains epithelial cells, Langerhans cells, and lymphocytes?

Epithelium Signup and view all the answers