Muscles of eyeball

... occasionally vomiting. The pain may be sharp or dull in or around the eyeball, but more often is a dull ache in the frontal part of the head. Dim ... peripheral factors (skeletal muscle weakness, e.g., the intercostal muscles, and bronchoconstriction) may contribute. Gastrointestinal tract: ...

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I don't think it's really a change in eyeball shape but a change in the muscles controlling the lense.

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