December 2008
Volume 8, Issue 17
Free
OSA Fall Vision Meeting Abstract  |   December 2008
Visual performance after adaptive-optics correction of ocular aberrations: visual acuity, subjective quality preference of natural images and recognition of faces and facial expressions
Author Affiliations
  • Lucie Sawides
    Institute of Optics, CSIC, Images and Vision Dept, Madrid, Spain
  • Carlos Dorronsoro
    Institute of Optics, CSIC, Images and Vision Dept, Madrid, Spain
  • Enrique Gambra
    Institute of Optics, CSIC, Images and Vision Dept, Madrid, Spain
  • Susana Marcos
    Institute of Optics, CSIC, Images and Vision Dept, Madrid, Spain
Journal of Vision December 2008, Vol.8, 82. doi:10.1167/8.17.82
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      Lucie Sawides, Carlos Dorronsoro, Enrique Gambra, Susana Marcos; Visual performance after adaptive-optics correction of ocular aberrations: visual acuity, subjective quality preference of natural images and recognition of faces and facial expressions. Journal of Vision 2008;8(17):82. doi: 10.1167/8.17.82.

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

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Abstract

PURPOSE: To measure the effect of the correction of the natural ocular aberrations on the subject's performance in four visual tasks.

METHODS: A psychophysics channel was inserted in a custom adaptive-optics (AO) system provided with a deformable-mirror and a Hartmann-Shack sensor (Imagine Eyes). VA was measured with tumbling black E-letters. For subjective quality preference we presented 34 natural images viewed alternatively by the subject through natural aberrations/AO correction, to choose the “sharpest”. For face recognition we presented 33 faces (15 familiar), randomly with/without AO-correction. The task required identifying familiar faces (1–6 score). The fourth experiment was similar, the task being to recognize facial expressions (39 happy/angry). Results of quality preference were analysed in terms of percentage images preferred with/without AO; recognition as the area under Response-Operating-Curves (Au_ROC). Measurements were done on three young subjects.

RESULTS: 1) Responses varied across subjects depending on the corrected aberrations. S1 showed the lowest amount of natural aberrations, the lowest AO correction, a VA decrease with correction (x0.96) and preferred 94% of images viewed with natural aberrations; S3 experienced the highest AO-correction, the largest VA benefit (x1.17) and preferred 97% of the images under correction. 2) For familiar face recognition, the Au_ROC curves increased by x1.13 (average) with correction. 3) For facial expression recognition, no subject benefited from correction (Au_ROC changed by x0.82).

CONCLUSION: Correcting ocular aberrations produces improvement in VA, subjective sharpness impression and face recognition in subjects with significant AO-correction. Facial expression recognition does not benefit from correction. Neural adaptation effects cannot be discarded.

MarcosS.SawidesL.GambraE.DorronsoroC. (2008). Influence of Adaptive-optics ocular aberration correction on visual acuity at different luminances and contrast polarities. Journal of Vision. In press.

PeliE.LeeE.TrempeC.L.BuzneyS. (1994). Image enhancement for the visually impaired: the effects of enhancement on face recognition. Journal of the Optical Society of America A-optics Image Science and Vision, 11(7), 1929–1939.

HalitH.de HaanM.SchynsP. G.JohnsonM. H. (2006). Is high-spatial frequency information used in the early stages of face detection?. Brain Research 1117, 154–161.

VuilleumierP.ArmonyJ. L.DriverJ.DolanR. J. (2003). Distinct spatial frequency sensitivities for processing faces and emotional expressions. Nature Neurosciences 6(6), 624–631.

CostenN. P.ParkerD. M.CrawI. (1996). Effects of high-pass and low-pass spatial filtering on face identification. Perception and Psychophysics 58(4): 602–612.

BullimoreM. A.BaileyI. L.WackerR. T. (1991). Face recognition in age-related maculopathy. Investigative Ophthalmology and Visual Science 32(7), 2020–2029.

OwsleyC.SloaneM. E. (1987). Contrasct sensitivity, acuity and the perception of real world targets. British Journal of Ophthalmology 71 (10), 791–796.

MetzC. E.WangP.-L.KronmanH.B. (1984). A new approach for testing the significance of differences between ROC curves measured from correlated data. Information Processing in Medical Imaging, (Amsterdam, Nijhoff) pp. 432–445.

Sawides, L. Dorronsoro, C. Gambra, E. Marcos, S. (2008). Visual performance after adaptive-optics correction of ocular aberrations: visual acuity, subjective quality preference of natural images and recognition of faces and facial expressions [Abstract]. Journal of Vision, 8(17):82, 82a, http://journalofvision.org/8/17/82/, doi:10.1167/8.17.82. [CrossRef]
Footnotes
 supported by MEyC FIS2005-04382 and EURYI Award to SM; MEyC FPI Predoctoral Fellowship to LS; MEyC I3P Predoctoral Fellowship to EG.
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