A disorder of the vision where the eye focusses images behind the retina instead of on it, so that distant objects can be seen better than near objects.
Vision (ability)
That which is detected by the five senses; not necessarily understood (imagine looking through fog, trying to understand if you see a small dog or a cat); also that which is detected within consciousness as a thought, intuition, deduction, etc.
Conscious understanding of something.
The organisation, identification and interpretation of sensory information.
Acuity