Which of the following structures are transparent in normal eyes?
A. Cornea
B. Lens
C. Neural retina
D. Choroid
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Which of the following is true about ptosis?
A. Normally, the upper eyelid of an adult should cover the superior corneal limbus 3-4mm.
B. Ptosis is one or both upper eyelids cover more than 2mm of the inferior corneal limbus.
C. Ptosis is a sign of Horner syndrome.
D. Aponeurotic ptosis is related to age.
Ectropion is ()
A. Eversion of the lower eyelid.
B. The cause might be slackening of the levator muscle.
C. It can cause exposure keratitis.
D. Surgery would be effective treatment.
Entropion is ()
A. Eyelid turning outward toward the eyeball
B. It may be involutional, cicatricial or congenital.
C. Involutional entropion always affects the upper eyelid.
D. Cicatricial entropion is the result of conjunctival and tarsal scar formation.
Which of the following is true about blepharitis?
A. Staphylococcal and Seborrheic blepharitis usuallly present at the same time.
B. The patient may complain of irritation, burning and itching of the lid margins.
C. Scarring of the tarsal conjunctiva can be detected.
D. For anterior blepharitis, we need long-term low-dose systemic antibiotic therapy or weak topical steroids.
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