Season 3 Case 17
Case 17
History: headache

Answer:
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Notice the large, thinned posterior right globe, centered away from the optic disc.
Answer: Right globe staphyloma
This is commonly confused with a coloboma, which is a small, focal defect/lack of fusion of the choroidal fissure, ie at or near the optic disc
References
staphyloma: http://radiopaedia.org/articles/staphyloma
coloboma: http://radiopaedia.org/articles/coloboma