Abstract: Mucopolysaccharidosis is a series of rare diseases where a lack of an enzyme affecting mucopolysaccharides metabolism in the patients′ lysosome induces the intracellular deposition of the mucopolysaccharides, and causes ocular and organ-related complications. Ocular complications included corneal opacity, glaucoma, ametropia, strabismus, and chorioretinopathy. This review summarizes the mechanisms, clinical manifestations, specific ophthalmological examinations, and treatments for offering the ophthalmological knowledge to diagnose and begin treatment earlier.