An anomaly of the trabecular meshwork, which is the porelike structure surrounding the entire circumference of the anterior chamber at the base of the cornea and near the ciliary body. The trabecular mesh work is responsible for draining the aqueous humor into the canal of Schlemm. The phenotype is HP_0012630 (Abnormal trabecular meshwork morphology). Also known as: Abnormality of the trabecular meshwork.