• Courtesy of Arif O. Khan, MD.
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    Pediatric Ophth/Strabismus

    A, Left optic nerve hypoplasia. Note the small, pale disc with vascular tortuosity. B, Left optic nerve hypoplasia with the double ring sign. When viewed quickly, the hypoplastic disc–ring complex may be mistaken for a normal-sized optic nerve. C, The normal right optic disc of the patient shown in part B.