Blue sclera is seen in all except
In keratoconus, there are no scleral changes. Blue sclerae are characteristic of connective tissue disorders like osteogenesis imperfecta, Marfan's syndrome, Ehlers-Danlos syndrome. Ref: Maheshwari 6e pg 316.
keratoconus
Marfans syndrome
Osteogenesis impercta
Ehler Danlos syndrome
Anatomy and physiology of bone and fracture healing