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Y. Hirohara, M. Kobayashi, T. Yamaguchi, T. Mihashi; Fluctuation of Aberrations and Pupil Sizes for Both Eyes Measured Using a Binocular Open-View Shack-Hartmann Wavefront Sensor. Invest. Ophthalmol. Vis. Sci. 2007;48(13):2788.
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Accommodation, wavefront aberrations (WAs) and pupil sizes (PSs) for both eyes dynamically fluctuate and those between both eyes might be synchronized. We investigated time varying WAs including accommodation and PSs using a binocular open-view Shack-Hartmann wavefront sensor.
We developed a binocular open-view Shack-Hartmann wavefront sensor to measure WAs and PSs for both eyes simultaneously. Four normal subjects were investigated in this study. Visual stimuli were presented at 1.5 diopters (D) farther than the far point of each subject so as not to stimulate accommodation. Binocular WAs and PSs were measured 16 times per second for 15 seconds after blinking. The root mean square (RMS) errors of higher-order aberrations up to sixth order were calculated. We investigated time variances of accommodations, WAs, and PSs among the subjects between both eyes in each subject.
We observed a difference in refraction between both eyes in every subject and maximum of the difference was 2.02 D. Although we observed this difference, the time variations of the accommodation between both eyes were almost identical keeping the difference constant in all cases. We observed the identical time variation in PSs. The time variation between accommodation and PS were not correlated. Time variations of the spherical aberrations were similar to that of accommodations in two cases out of the four cases. The longitudinal coma aberrations were not correlated in both eyes. The other higher-order aberrations varied independently.
We found that the time variations in accommodation and PSs were correlated between both eyes even when there was a difference in refraction between both eyes. Higher-order aberrations except the spherical aberration varied independently.
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