The organisation, identification and interpretation of sensory information.
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.
Vision (ability)
Conscious understanding of something.
Acuity
The quality or state of being sensitive; sensitiveness.
The degree of response of an instrument to a change in an input signal.
The degree of response of a film etc. to light of a specified wavelength.
The ability of an organism or organ to respond to external stimuli.
Vulnerability to medical treatment: Synonym of susceptibility.
The probability, in a binary classification test, of a true positive being correctly identified.