Keratoconus is associated with all except –: (A) Down's syndrome, (B) Ehlers–Danlo's syndrome, (C) Marfan's syndrome, (D) Usher's syndrome
Answer is D. Systemic conditions associated with keratoconus are a marfan syndrome, osteogenesis- imperfecta, EDS, Down's syndrome, MVP, atophy (asthma, eczema, atopic keratoconjunctivitis, hay fever).