I believe it is the retina that changes shape to focus on distant objects.
I would be disturbed because of the hormones that would be pumped or the unhealthy products that are put in it.
The answer is survival
This is the ceasing of the existence of any particular species. ... A condition in which two populations of the same species, over time, can no longer breed with each other to produce live offspring. Survival. This is the set of skills and abilities necessary for an organism to live. If you’re looking for a one word answer, it’s survival.
