Method and apparatus for detecting deterioration in dark adaptation

A process psychophysical measure dark adaptation in a subject, said method comprising the steps of: a. providing said subject; b. Bleaching an eye test said subject; c. present an objective stimulus that eye test said subject; d. determining a response of said subject to said target stimulus obtaining at least a threshold measure; and e. subjecting said at least one threshold as a noise reduction protocol to eliminate artifacts due to a distraction from the subject or the subject error.