Keratoconus is associated with all except-

Keratoconus may be associated with : Ocular conditions e.g. ectopia lentis, congenital cataract, aniridia, retinitis pigmentosa, and vernal keratoconjunctivitis (VKC).Systemic conditions e.g., Marfan's sysndrome, atopy, Down's syndrome, Ehlers-Danlos syndrome, osteogenesis imperfecta and mitral valve prolapse. Reference:Comprehensive ophthalmology,AK Khurana,4th edition,page no.120