This message is posted with the originator's permission.
R 231644Z MAY 07 ZUI ASN-A00143000007 ZYB
FM COMDT COGARD WASHINGTON DC//CG-11//
TO ALCOAST
BT
UNCLAS //N06490//
ALCOAST 261/07
COMDTNOTE 6490
SUBJ: POLICY CHANGE TO DEPTH PERCEPTION REQUIREMENTS
A. MEDICAL MANUAL COMDTINST M6000.1 (SERIES)
1. THIS ALCOAST ANNOUNCES A CHANGE TO REF (A) CHAPTER 3 SECTION C
22 J "DEPTH PERCEPTION". REPLACE SECTION J WITH THE FOLLOWING:
DEPTH PERCEPTION. DEPTH PERCEPTION MAY BE DETERMINED BY THE AFVT
(ARMED FORCES VISION TESTER) OR OPTEC 2300, THE RANDOT (RANDOM DOT
CIRCLES TEST), OR THE TITMUS (TITMUS GRADED CIRCLES STEREO ACUITY
TEST). WHEN DOING A PHYSICAL ON THE DD-2808, IF YOU DO NOT USE THE
AFVT, LINE THROUGH THE PRE-PRINTED ENTRY AND RECORD THE TEST USED
WITH THE PROPER SCORE. IF YOU USE THE AFVT AND THEN ALSO USE
ANOTHER DEPTH PERCEPTION TEST, RECORD THE AFVT IN BLOCK 67 AND THEN
RECORD THE ADDITIONAL DEPTH PERCEPTION TEST FINDINGS IN BLOCK 60
(OTHER VISION TEST) OR BLOCK 73 (NOTES).
A. IF THE ARMED FORCES VISION TESTER (AFVT) OR OPTEC 2300 IS
USED, HAVE THE PATIENT SEATED COMFORTABLY. IF THE PATIENT WEARS A
HABITUAL SPECTACLE PRESCRIPTION THEY MAY BE TESTED WITHOUT THE
PRESCRIPTION, BUT IF THEY FAIL, RETEST WITH THE PRESCRIPTION. TEST
EMULATES DISTANCE TEST (OPTICAL INFINITY). REFER TO MANUAL FOR
CORRECT SETTINGS FOR MODEL BEING USED. THE FOLLOWING GUIDELINES
MUST BE ADHERED TO WHEN TESTING:
(1) GROUP A IS FOR DEMONSTRATION PURPOSES ONLY AND SHOULD NOT
BE USED AS PART OF THE ACTUAL TEST (SEE MANUAL).
(2) GROUP B IS AT THE LEVEL OF THE NEW OVERALL STANDARD OF 40
SECONDS OF ARC, THERE ARE THREE PRESENTATIONS OF FIVE CIRCLES EACH
WITHIN GROUP B. THE PATIENT IDENTIFIES THE CIRCLE WITHIN EACH
PRESENTATION THAT APPEARS "CLOSEST".
(3) PATIENT MUST CORRECTLY IDENTIFY ALL PRESENTATIONS WITHIN
GROUP B TO PASS.
(4) YOU MAY TEST BEYOND GROUP B IF DESIRED BUT IT IS NOT
NECESSARY. RECORD AS "AFVT GROUP B - PASS".
(5) IF PATIENT FAILS ANY IN THE GROUP, RETEST USING RANDOT
AND/OR TITMUS BELOW.
B. RANDOT (RANDOM DOT CIRCLES TEST). IF THE PATIENT WEARS
HABITUAL SPECTACLE PRESCRIPTION THEY MAY TEST WITHOUT THE
PRESCRIPTION, BUT IF THE PATIENT FAILS, RETEST WITH THE
PRESCRIPTION. POLAROID SPECTACLES MAY ALSO BE WORN (OVER HABITUAL
PRESCRIPTION IF REQUESTED). TEST DISTANCE IS 40 CM (16 INCHES).
PROVIDE ADEQUATE LIGHT BUT AVOID REFLECTIONS FROM THE TESTS
SURFACE. HOLD TEST UPRIGHT TO MAINTAIN THE PROPER AXIS OF
POLARIZATION. DO NOT PERMIT THE PATIENTS HEAD TO TILT DURING
TESTING. THE FOLLOWING GUIDELINES MUST BE ADHERED TO WHEN TESTING:
(1) THERE ARE TEN PRESENTATIONS OF THREE CIRCLES EACH IN THE
RANDOT, YOU MUST TEST ALL TEN PRESENTATIONS, DO NOT STOP AFTER
NUMBER SEVEN.
(2) YOU MUST TEST ALL PRESENTATION IN ORDER, DO NOT JUMP
AROUND SINCE EACH LEVEL IS PROGRESSIVELY MORE DIFFICULT.
(3) PATIENT IDENTIFIES THE CIRCLE THAT APPEARS "CLOSEST".
(4) TEST UNTIL THE PATIENT MISSES TWO LEVELS IN A ROW.
(5) RECORD THE LAST LEVEL PASSED SUCCESSFULLY.
(6) FOR RANDOT, A MINIMUM PASSING SCORE IS CORRECTLY
IDENTIFYING PRESENTATIONS 1 THROUGH 7 WHICH EQUALS 40 SECONDS OF
ARC.
(7) RECORD AS THE NUMBER MISSED OVER THE NUMBER POSSIBLE.
FOR EXAMPLE, "RANDOT 3/10 PASS" OR "RANDOT 4/10 FAIL".
(8) IF THE PATIENT FAILS THE RANDOT, THE PATIENT MAY BE
RETESTED USING AFVT/OPTEC 2300 OR TITMUS.
C. TITMUS (TITMUS GRADED CIRCLES STEREO ACUITY TEST). IF THE
PATIENT WEARS HABITUAL SPECTACLE PRESCRIPTION THEY MAY TEST WITHOUT
THE PRESCRIPTION, BUT IF THEY FAIL, RETEST WITH THE PRESCRIPTION.
POLAROID SPECTACLES MAY ALSO BE WORN (OVER HABITUAL PRESCRIPTION IF
REQUESTED). TEST DISTANCE IS 40 CM (16 INCHES). PROVIDE ADEQUATE
LIGHT BUT AVOID REFLECTIONS FROM THE TESTS SURFACE. HOLD TEST
UPRIGHT TO MAINTAIN THE PROPER AXIS OF POLARIZATION. DO NOT PERMIT
THE PATIENTS HEAD TO TILT DURING TESTING. THE FOLLOWING GUIDELINES
MUST BE ADHERED TO WHEN TESTING:
(1) THERE ARE NINE PRESENTATIONS OF FOUR CIRCLES EACH IN THE
TITMUS.
(2) YOU MUST TEST ALL NINE PRESENTATIONS.
(3) YOU MUST TEST ALL PRESENTATIONS IN ORDER. DO NOT JUMP
AROUND SINCE EACH LEVEL IS PROGRESSIVELY MORE DIFFICULT.
(4) PATIENT IDENTIFIES THE CIRCLE THAT APPEARS "CLOSEST".
(5) TEST UNTIL THE PATIENT MISSES TWO LEVELS IN A ROW (OR THE
LAST PRESENTATION).
(6) RECORD THE LAST LEVEL PASSED SUCCESSFULLY.
(7) FOR TITMUS, A MINIMUM PASSING SCORE IS CORRECTLY
IDENTIFYING ALL OF THE PRESENTATIONS 1 THROUGH 9 WHICH EQUALS 40
SECONDS OF ARC.
(8) RECORD AS THE NUMBER MISSED OVER THE NUMBER POSSIBLE.
FOR EXAMPLE "TITMUS 0/9 PASS OR 1/9 FAIL".
2. THIS CHANGE WILL BE REFLECTED IN A FUTURE CHANGE TO THE MEDICAL
MANUAL.
3. IF A PERSON HAS FAILED A FLIGHT PHYSICAL WITHIN THE LAST SIX
MONTHS DUE TO DEPTH PERCEPTION PLEASE RESUBMIT THE PHYSICAL TO
COMMANDANT CGPC FOR RECONSIDERATION.
4. INTERNET RELEASE IS AUTHORIZED.
5. RELEASED BY, RADM MARK J. TEDESCO, DIRECTOR OF HEALTH AND
SAFETY.
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