<prompt> Distance of medial rectus from limbus -4.5 mm5.5 mm7.0 mm10 mm  <response>: 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 