Because you won’t be able to see right, you can be dizzy and not seeing things right
Because you need to move to get tour blood pumping
Some signs would be: day blindness, involuntary eye movement, lazy eye, and photophobia.
Chromatopsia causes Acquired malfunction of the retinal phototransduction pathway Congenital damage to the diencephalon, thalamus, or the cerebral cortex.
Hope this helps!!