Sunday, January 19, 2014

The lens in eye, brief information

The lens is a transparent, biconvex structure of crystalline appearance placed between the iris and the vitreous. It is suspended by the suspensory ligament of the lens which is attached to the ciliary body and the equator of the lens. The accommodative power of lens varies with age, being 14 t o 16 dioptres at birth, 7 to 8 dioptres at 25 years of age and 1 to 2 dioptres at 50 years. The lens is composed of 64% water, 35% protein and 1% lipid, carbohydrates and trace elements. The metabolism of lens is anaerobic. Glycolysis is responsible for 85% glucose utilization resulting in lactate formation.

1 comment:

  1. Wow I had no idea that the accommodative power of the lens could vary so much with age. It is very interesting that the dioptres are so high at birth. I think there is something that I am not understanding about it. Because I would have thought it would have been lower at birth because babies can not see very far away. I will have to do some more reading on this to understand it better.