Which of the following statements regarding the pathogenesis of AION is correct?
A. the lack of blood supply to the optic disc caused by the anterior ciliary artery circulation disorder, resulting in acute ischemia, hypoxia and edema of the optic disc
B. the lack of blood supply to the optic disc caused by the posterior ciliary artery circulation disorder, resulting in acute ischemia, hypoxia and edema of the optic disc
C. Pathologically, it can be divided into arteritis and non-arteritis
D. None of the above
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What are the symptoms of optic neuritis?
A. Pain around the eyes
B. Vision loss
C. flashing or flickering lights
D. all of above
Which of the following statements regarding the signs of optic neuritis is NOT correct?
A. anterior subcapsular opacification
B. edema and hyperemia of the optic disc
C. bleeding around disc margin
D. B & C
What are the key points to differentiate optic neuritis from AION?
A. The average onset age of AION is usually more than 50 years old and have a history of hypertension, diabetes or cardiovascular disease
B. Patients with AION present with sudden painless visual loss, while patients with optic neuritis complain of impaired vision for hours to days, and with pain on eye movement.
C. Visual field examination shows inferior altitudinal defect in AION, but we find central scotoma in optic neuritis.
D. All of above
Which of the following statements regarding the investigations of optic neuritis is NOT correct?
A. delayed latency in visual evoked potential
B. CT scan suggests demyelination of optic nerve.
C. On perimetry test, typical central or paracentral scotoma or even complete blindness in severe cases will be seen.
D. In the fluorescein fundus angiograph examination, disc leakage will be found
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