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Updated: Jun 16, 2026

Integrated Photoacoustic Ophthalmoscopy and Spectral-domain Optical Coherence Tomography
Published on: January 15, 2013
Role of ocular aberrations in photopic spatial summation in the fovea
Eugénie Dalimier1, Chris Dainty
1Applied Optics Group, School of Physics, National University of Ireland, Galway, University Road, Galway, Ireland. eugenie.dalimier@gmail.com
Abstract:
An adaptive optics vision simulator was used to measure the role of ocular aberrations in the photopic foveal spatial summation curve for three young subjects. After the correction of the ocular aberrations over a 6 mm pupil, the increment luminance threshold was lowered for small stimuli and the estimated area of complete summation (Ricco's area) was reduced by a factor of 2.6 on average. These results show that the image spread due to natural ocular aberrations partly accounts for the spatial summation observed in the fovea in the photopic light regime.
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