<prompt> Water content in lens is ?6435128  <response>: Ans. is a i.e., 64 The lens is composed of 64 water, 35 protein, and 1 lipid, carbohydrate and trace elements. The protein concentration in the lens is actually the highest amongst body tissues. The main types of proteins are alpha 31, beta 55 and gamma 2 crystallins, and insoluble albuminoids 12. 