Gildas Marin

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We demonstrate that certain combinations of non-rotationally symmetric aberrations (coma and astigmatism) can improve retinal image quality over the condition with the same amount of astigmatism alone. Simulations of the retinal image quality in terms of Strehl Ratio, and measurements of Visual Acuity under controlled aberrations with adaptive optics were(More)
Previous studies suggest that certain combinations of coma and astigmatism improve optical quality over astigmatism alone. We tested these theoretical predictions on 20 patients. Visual acuity (VA) was measured under best spherical correction for different conditions: low- and higher order aberrations corrected, in the presence of 0.5 D of induced(More)
We studied the role of native astigmatism and ocular aberrations on best-focus setting and its shift upon induction of astigmatism in 42 subjects (emmetropes, myopes, hyperopes, with-the-rule [WTR] and against-the-rule [ATR] myopic astigmats). Stimuli were presented in a custom-developed adaptive optics simulator, allowing correction for native aberrations(More)
INTRODUCTION There exists an abundant literature on navigation strategies for the visual guidance of goal-directed locomotion. Two main strategies have been documented: the optic flow strategy (OF) and the egocentric direction strategy (ED). OF is assumed to be mainly used when optic flow is densely structured (Harris and Carre, 2001; Wilkie and Wann,(More)
In this study we have compared the subjective effect of distortions simulated ophthalmic lenses in a virtual lens simulator to the equivalent real ophthalmic test lenses, in static monocular and dynamic, monocular and binocular conditions, taking care of matching as best as possible virtual and real conditions. Though visual perception was found to be(More)
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