MedGen

Primary congenital glaucoma (PCG) is characterized by elevated intraocular pressure (IOP), enlargement of the globe (buphthalmos), edema, and opacification of the cornea with rupture of Descemet's membrane (Haab's striae), thinning of the anterior sclera and iris atrophy, anomalously deep anterior chamber, and structurally normal posterior segment except for progressive glaucomatous optic atrophy. Symptoms include photophobia, blepharospasm, and excessive tearing. Typically, the diagnosis is made in the first year of life. Depending on when treatment is instituted, visual acuity may be reduced and/or visual fields may be restricted. In untreated individuals, blindness invariably occurs. [from GeneReviews]

Glaucomas are a group of common neurodegenerative diseases of the optic nerve and retinal ganglion cells, characterized by progressive cupping of the optic nerve head with resultant visual field loss. Elevated intraocular pressure (IOP) is a strong risk factor for glaucoma; however, glaucoma can occur at any IOP. The most common form of glaucoma in the US is primary open-angle glaucoma (POAG; see 137760). POAG that occurs with an IOP below an arbitrary threshold of 21 mm Hg is often termed 'normal tension glaucoma' (summary by Fingert et al., 2011). For a discussion of genetic heterogeneity of primary open angle glaucoma, see 137760. [from OMIM]

The core phenotype of Elsahy-Waters syndrome consists of brachycephaly, facial asymmetry, marked hypertelorism, proptosis, blepharochalasis, midface hypoplasia, broad nose with concave nasal ridge, and prognathism; radicular dentin dysplasia with consequent obliterated pulp chambers, apical translucent cysts, recurrent infections, and early loss of teeth; vertebral fusions, particularly at C2-C3; and moderate mental retardation. Skin wrinkling over the glabellar region seems common, and in males, hypospadias has always been present. Inter- and intrafamilial variability has been reported regarding the presence of vertebral fusions, hearing loss, and dentigerous cysts. Midface hypoplasia, facial asymmetry, progressive dental anomalies, and impaired cognitive development become more evident in adulthood (summary by Castori et al., 2010). [from OMIM]

Primary closed-angle glaucoma (GLCC) is characterized by age-related variation in the degree of iridocorneal angle closure and its sequelae, with patients in the first 3 decades of life showing a normal eye exam, whereas older patients progressively show more evidence of angle closure and glaucomatous damage, including optic nerve head changes and visual field defects (Suri et al., 2018). [from OMIM]

An elevation in the ratio of the diameter of the cup of the optic disc to the total diameter of the disk. The optic disc has an orange-pink rim with a pale center (the cup) that does not contain neuroretinal tissue. An increase in this ratio therefore may indicate a decrease in the quantity of healthy neuroretinal cells. [from HPO]