PAX6 and ptosis: Broad phenotypic variability was observed in nystagmus, ptosis, strabismus, glaucoma, corneal pannus, corneal curvature, corneal vascularization, cataract subtype, ectopia lentis, axial length, and optic disc anomalies, showing phenotyically heterogeneous manifestations of the PAX6 c.307C>T mutation.