Over 2 million Americans suffer from glaucoma [1]. Certain types of glaucoma are directly related to the iris contour. For example, some cases of primary angle-closure glaucoma (PACG) involved with pupillary block, which the iris is abnormally positioned towards the anterior [2]. Generally, the iris contour is determined by two factors: external stresses arising from the flow of the aqueous humor (AH) and internal stresses due to the passive and active components of the constituent tissues.

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