<prompt> Axial length of orbit:2.5 mm2.5 cm2 mm2 cm  <response>: Ans. b 2.5 cmRef.: A.K. Khurana 6th ed. 3 Axial length of orbit is 24 mm i.e. 2.4 cm Volume of orbit: 6 ml Depth of anterior chamber: 3 mm Eyeball Made of 3 layers: Sclera: Outer Choroid: Middle vascular layer; a dangerous layer Retina: Inner Cornea forms anterior l6th of eyeball and sclera forms posterior 56th of eyeball 