June 2013
Volume 54, Issue 15
Free
ARVO Annual Meeting Abstract  |   June 2013
Object identification by retinitis pigmentosa patients in dim light, using a Head Mounted Display
Author Affiliations & Notes
  • Marion Swital
    R&D, Essilor International, Paris, France
  • Coen Cecilia
    INSERM, U968; UPMC Univ Paris 06, UMR_S 968, Institut de la Vision; CNRS, UMR_7210; CHNO des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
  • Caroline Chauvire
    INSERM, U968; UPMC Univ Paris 06, UMR_S 968, Institut de la Vision; CNRS, UMR_7210; CHNO des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
  • Arnaud Koustanai
    INSERM, U968; UPMC Univ Paris 06, UMR_S 968, Institut de la Vision; CNRS, UMR_7210; CHNO des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
  • Guillaume Le Gall
    R&D, Essilor International, Paris, France
  • Sihem Kime
    INSERM, U968; UPMC Univ Paris 06, UMR_S 968, Institut de la Vision; CNRS, UMR_7210; CHNO des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
  • Philippe Chaumet-Riffaud
    INSERM, U968; UPMC Univ Paris 06, UMR_S 968, Institut de la Vision; CNRS, UMR_7210; CHNO des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
    Univ Paris Sud, AP-HP, CHU Bicêtre, EA 4046, Paris, France
  • Saddek Mohand-Said
    INSERM, U968; UPMC Univ Paris 06, UMR_S 968, Institut de la Vision; CNRS, UMR_7210; CHNO des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
  • Jose Sahel
    INSERM, U968; UPMC Univ Paris 06, UMR_S 968, Institut de la Vision; CNRS, UMR_7210; CHNO des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
  • Avinoam Safran
    INSERM, U968; UPMC Univ Paris 06, UMR_S 968, Institut de la Vision; CNRS, UMR_7210; CHNO des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
  • Footnotes
    Commercial Relationships Marion Swital, Essilor International (E); Coen Cecilia, None; Caroline Chauvire, None; Arnaud Koustanai, None; Guillaume Le Gall, Essilor International (E); Sihem Kime, ALTEN SA (E); Philippe Chaumet-Riffaud, None; Saddek Mohand-Said, None; Jose Sahel, UPMC/Essilor (P), Second Sight (F); Avinoam Safran, essilor (F)
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2013, Vol.54, 2766. doi:https://doi.org/
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      Marion Swital, Coen Cecilia, Caroline Chauvire, Arnaud Koustanai, Guillaume Le Gall, Sihem Kime, Philippe Chaumet-Riffaud, Saddek Mohand-Said, Jose Sahel, Avinoam Safran; Object identification by retinitis pigmentosa patients in dim light, using a Head Mounted Display. Invest. Ophthalmol. Vis. Sci. 2013;54(15):2766. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: Retinitis pigmentosa (RP) results in peripheral vision loss and reduced, delayed dark-adaptation. In this study we assessed with affected individuals in dim light, the value of enhanced luminance image processing using a Head Mounted Display (HMD), to locate and identify objects.

Methods: We enrolled 12 patients with RP, complaining of night blindness to various degrees, (23 to 81 years old, mean = 43; visual acuity (VA) = -0.1 to +0.5 logMAR, mean = +0.15; horizontal visual field = 20° to 180°, mean = 52°). Dark-adaptation threshold was assessed with Goldmann-Weekers adaptometer. We used a non-immersive HMD (Lumus, Israel; Essilor Int. and Institut de la Vision, Paris) which provides a luminance-enhanced video image, displayed through transparent lenses. The experiment took place in a living room, including regular furniture. Before starting the evaluation, the tested subject viewed the furniture setting in photopic lighting condition (700 lux). Then, the subject turned his back on the scene, and the experimenter placed nine objects on various locations. Eventually lighting was abruptly reduced to 3 lux, and the, subject was asked to identify all added objects as quickly as possible. Trials were repeated three times, with and without the HMD. Between two consecutive trials, object locations were changed, and the subject was exposed to photopic condition during 5 minutes to prevent dark adaptation. The number of objects and the detection time were recorded.

Results: To identify the presented objects, four of 12 patients performed better using the HMD than without it (F(1,54) = 8.05; p < .01). In this group, three subjects had time-savings of mean 45.6 s with the HMD and two subjects were able to recognize more objects with the HMD (mean= 4.7). For these four subjects, alteration in dark adaptation and reduction in VA were more pronounced than for the remaining patients.

Conclusions: The luminance-enhanced image provided by the HMD improved object identification, following sudden reduction in lighting for patients with advanced RP. It may prove valuable in daily life, in such lighting conditions. Less affected Individual might also benefit from the HMD in dark environments if a more light-sensitive camera is used.

Keywords: 549 image processing • 719 scene perception • 702 retinitis  
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