In October 1998, the USAF endorsed a longitudinal clinical evaluation of the long-term effects of PRK on visual performance, including three cockpit simulation experiments. Twenty nonflying active duty AF personnel volunteered and were baselined before undergoing PRK at Wilford Hall Medical Center. All three experiments used adaptive threshold estimation to determine visual acuity (VA) and contrast sensitivity (CS) thresholds during various simulated cockpit tasks at baseline, 6-months, 12-months and 24-months post-PRK. Thresholds were determined using both a laser and broadband glare source and a no glare condition. Experiment 1 (Freiburg VA and CS) also used a windscreen experimental manipulation in half of the trial runs. Freiburg VA was almost two full Snellen lines worse with the laser glare source in place versus the broadband glare source, which may be due to masking from coherent spatial noise (laser speckle). Freiburg CS performance dropped significantly following PRK with the no glare condition only. PRK did not affect the ability of the subject to perform Experiment 2 & 3 flight tasks.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Using the Simulated Cockpit to Validate Visual Performance After Photorefractive Keratectomy in USAF Personnel


    Contributors:
    R. J. Dennis (author) / J. M. Beer (author) / F. J. LoRusso (author) / D. J. Ivan (author) / J. B. Baldwin (author)

    Publication date :

    2003


    Size :

    32 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Visual performance under dilated conditions following excimer photorefractive keratectomy

    Casson, E. J. / Jackson, W. B. / Mintsioulis, G. et al. | British Library Conference Proceedings | 1996


    Excimer laser photorefractive keratectomy : the effect on binocular function

    White, J. / European Strabismological Association | British Library Conference Proceedings | 1998


    Results of Excimer-Laser-Performed Photorefractive Keratectomy Operations [3573-204]

    Ferincz, I. E. / Ratkay-Traubcal, I. / Dinnyes, M. et al. | British Library Conference Proceedings | 1998