Cataract 31, Multiple Types, also known as cataract, posterior polar, 3, is related to early-onset sutural cataract and cataract 28. An important gene associated with Cataract 31, Multiple Types is CHMP4B (Charged Multivesicular Body Protein 4B). Affiliated tissues include eye and b cells, and related phenotypes are posterior subcapsular cataract and anterior subcapsular cataract