49 out of 52
The corneal stroma: (AIIMS May 2012)
|A||measures 500 um thick|
|B||transmits 90% of the incoming light|
|C||derives most of its oxygen from the precorneal tear film|
|D||is acellular which accounts for its transparency|
Ans. A cornea transmits 98% of the light.The oxygen is derived mainly from the aqueous.The stroma contains keratocytes which are importantin the repair of stroma.In the anterior third, the collagen fibrils forms obliquely oriented lamellae and in the posterior two-third, they are parallel.