The retina is the inner part of the eyeball. The middle part is the choroid. Covered by the conjuctiva, what is the name of this outer part? In humans, this whole outer part is white, contrasting with the iris. In other mammals, the visible section of this part matches the iris.

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1. The retina is the inner part of the eyeball. The middle part is the choroid. Covered by the conjuctiva, what is the name of this outer part? In humans, this whole outer part is white, contrasting with the iris. In other mammals, the visible section of this part matches the iris.