Skip to main content

Free Content Visual and Flight Performance Recovery After PRK or LASIK in Helicopter Pilots

Download Article:
(HTML 47.6357421875 kb)
(PDF 527.869140625 kb)


Van de Pol C, Greig JL, Estrada A, Bissette GM, Bower KS. Visual and flight performance recovery after PRK or LASIK in helicopter pilots. Aviat Space Environ Med 2007; 78:547–553.

Introduction: Refractive surgery, specifically photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK), is becoming more accepted in the military environment. Determination of the impact on visual performance in the more demanding aviation environment was the impetus for this study. Methods: A prospective evaluation of 20 Black Hawk pilots pre-surgically and at 1 wk, 1 mo, and 6 mo post-surgery was conducted to assess both PRK and LASIK visual and flight performance outcomes on the return of aviators to duty. Results: Of 20 pilots, 19 returned to flight status at 1 mo after surgery; 1 PRK subject was delayed due to corneal haze and subjective visual symptoms. Improvements were seen under simulator night and night vision goggle flight after LASIK; no significant changes in flight performance were measured in the aircraft. Results indicated a significantly faster recovery of all visual performance outcomes 1 wk after LASIK vs. PRK, with no difference between procedures at 1 and 6 mo. Low contrast acuity and contrast sensitivity only weakly correlated to flight performance in the early post-operative period. Discussion: Overall flight performance assessed in this study after PRK and LASIK was stable or improved from baseline, indicating a resilience of performance despite measured decrements in visual performance, especially in PRK. More visually demanding flight tasks may be impacted by subtle changes in visual performance. Contrast tests are more sensitive to the effects of refractive surgical intervention and may prove to be a better indicator of visual recovery for return to flight status.

Keywords: contrast sensitivity; helicopter flight performance; laser in situ keratomileusis; low contrast acuity; military; photorefractive keratectomy; refractive surgery

Document Type: Research Article

Publication date: 2007-06-01

More about this publication?
  • Access Key
  • Free ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more