Was Monovision Contact Lens use the Cause?
By Robert Baron (firstname.lastname@example.org) THE ACCIDENT October 19,1996. 1638 EDT: Delta Airlines Flight 554, a McDonnell Douglas MD-88, descended below the visual glidepath and collided with terrain on approach to New York’s LaGuardia Airport. There were 3 minor injuries and 60 uninjured. In its official investigation of the crash, the NTSB (National Transportation Safety Board) reached the following conclusions as to the probable cause: The airplane had struck the approach light structure and the end of the runway deck during the approach. Because of the captain’s use of monovision contact lenses, he was unable to overcome the visual illusions resulting from the approach over water in limited light conditions (absence of visible ground features), the irregular spacing of the runway edge lights at shorter-than-usual intervals, the rain, and the fog, and that these illusions led the captain to perceive that the airplane was higher than it was during the visual portion of the approach, an