A case of congenital glaucoma occurred in mirror-image eyes of identical male twins. Twinning is a possible role in the production of unilateral congenital glaucoma. It is suggested that the glaucoma in these patients resulted from a developmental lag of the angle structures in the eyes formed along the line of fission during the twinning process.
Rasmussen DH, Ellis PP. Congenital Glaucoma in Identical Twins. Arch Ophthalmol. 1970;84(6):827-830. doi:10.1001/archopht.1970.00990040829024