I found this on another forum but in 2008. Anyone know if this is still true? Medical Manual said... Color Perception. Normal color perception is required for retention of commissioned officers (certain warrant officer specialties do not require normal color perception) and selected ratings [See the Personnel Manual, COMDTINST M1000.6 (series) Chapter 5-B]. The testing for color vision must be unaided or with standard corrective lenses only. Use of any lenses (such as Chromagen) or other device to compensate for defective color vision is prohibited. Retesting for color perception is normally not required if results of previous tests are documented in the health record, and there has been no history of a change in color vision. Exception: At the time of accession medical screening (e.g. Coast Guard Academy (including cadets and OCS candidates), Cape May recruits) the PIP color vision test will be repeated and normal color vision confirmed under controlled conditions as described in Chapter 3 Section C 22.i of this manual. Examinees are qualified if they pass either the Pseudoisochromatic Plates (PIP) or the Farnsworth Lantern (FALANT) test. Examinees who fail the PIP are qualified if they pass the FALANT.