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    • 13 JUL 17
    • 0

    ONH appearance in nonarteritic anterior ischemic optic neuropathy

    ONH appearance in nonarteritic anterior ischemic optic neuropathy (NAION) and arteritic anterior ischemic optic neuropathy (AAION). A, The healthy eye demonstrates a characteristic crowded appearance, which has been called “disc at risk.” B, ONH appearance in NAION. Edema is segmental, with mild superimposed pallor and flame hemorrhages. C, The healthy eye demonstrates a normal cup–disc ratio. Lack of a disc at risk should suggest an AAION. D, ONH appearance in AAION. Pallor is more pronounced.
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    Source: Daily Dose of Eye Care

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