C is correct because it’s documented
I think its thru blood cells im not sure though.
Depth perception is the ability to see the world in 3 dimensions and by doing so to be able to estimate the distance between objects.
Retinal disparity<span> is defined as the way that your left eye and your right eye view slightly different images. </span>
Convergence refers to the eyes' disposition to rotate inward toward each other in a coordinated manner in order to focus effectively on nearby objects. <span>
</span>Disparity and convergence are the two important things that help us to judge distance. W<span>hen looking at a close-up object, your eyes angle inwards towards each other (you become slightly cross-eyed). The extra effort used by the muscles on the outside of each eye gives a clue to the brain about how far away the object is. This is convergence.</span>
For example, people who have anorexia severely reduce their food intake to lose weight. People who have bulimia eat an excessive amount of food in a short period of time, then purge or use other methods to prevent weight gain.
