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scleral ossicle, sclerotic bones
A pair of small dish-shaped bones that cap the anterior and posterior margin of the eyeball. The sclerotic bones also called scleral ossicles form from the scleral cartilage between the sclera and the optic choroid. The ossicles develop via unilateral perichondral ossification of the scleral cartilage from two centers opposite one another in the eye.