In anterior segment mesenchymal ocular dysgenesis (ASMOD), multiple tissues are affected, including the iris, cornea, and lens as well as the Schlemm's canal and trabecular meshwork drainage structures located at the anterior segment angle where the iris and cornea meet. These abnormalities may result from a primary defect in the migration and/or differentiation of the mesenchymal cells that contribute to development of the cornea, iris, and drainage structures.