This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
Blue sclera is seen in- 
Select and explain. 
A. Alkaptonuria, B. Osteogenesis imperfecta, C. Turners' syndrome, D. Kawasaki syndrome
B: Osteogenesis imperfecta
Answer: B: Osteogenesis imperfecta 
Explanation: It is an asymptomatic condition characterised by marked, generalised blue discolouration of sclera due to thinning (Fig. 6.7). It is a typical association of osteogenesis imperfecta. Its other causes are Marfan&;s syndrome, Ehlers-Danlos syndrome, pseudoxanthoma elasticum, buphthalmos, high myopia and healed scleritis.