Distance of medial rectus from limbus -: (A) 4.5 mm, (B) 5.5 mm, (C) 7.0 mm, (D) 10 mm
Answer is B. Rectus muscles originate from a common tendinous ring- the annulus of Zinn, which is attached to the apex of the orbit. Different distances from limbus are - >>medial rectus : 5.5 mm >>inferior rectus: 6.5mm >>lateral rectus : 6.9mm >>superior rectus:7.7mm Ref;A.K.Khurana; 6th edition; Page no:336