Nanophthalmos 4, also known as nanophthalmia 4, is related to contractures, pterygia, and spondylocarpotarsal fusion syndrome 1a and intraocular pressure quantitative trait locus. An important gene associated with Nanophthalmos 4 is TMEM98 (Transmembrane Protein 98). Affiliated tissues include retina and eye, and related phenotypes are optic disc drusen and microphthalmia