Within the vertebrate eye, there is a crystalline protein that is in charge of making fine adjustments in the focus of images on the photosensitive layer. what is the name of this crystalline protein? retina cornea iris lens pupil

The name of the crystalline protein is LENS. The principal function of the lens is accommodation. This is the ability of the lens to change its shape in such a way that it will be able to change the focal distance of the eyes so that it can focus on objects that are various distances away from the eyes.

The answer is constant.