Glaucoma 1, Open Angle, M, also known as glc1m, is related to glaucoma, primary open angle and contractures, pterygia, and spondylocarpotarsal fusion syndrome 1a. An important gene associated with Glaucoma 1, Open Angle, M is GLC1M (Glaucoma 1, Open Angle, M (Juvenile-Onset)). Related phenotypes are constriction of peripheral visual field and open angle glaucoma