Publications by authors named "Luis Alberto Issolio"

Article Synopsis
  • The study aimed to evaluate spatial contrast sensitivity (CS) in patients suspected of having primary open-angle glaucoma (POAG), comparing their results with healthy individuals.
  • Results showed that both foveal and peripheral CS were significantly lower in suspected POAG patients, especially in older individuals, compared to the control groups.
  • The findings suggest that spatial vision loss occurs before the full onset of POAG, indicating potential for early detection and diagnosis.
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The pupil light reflex (PLR) can serve as a biomarker of the photoreceptor function. Protocols for chromatic PLR consider mostly pulsed stimulation. A more sophisticated and promising technique is based on the PLR to flickering stimulation.

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The purpose of this study is to determine the pupillary dynamics with periodical flashes from a peripheral glare source, in similar conditions to night driving, while focusing on dependence with age. We measured two groups of people: youth and adults. Maximum pupil size decreases due to periodic flashes.

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A glare source in the visual field modifies the brightness of a test patch surrounded by a mesopic background. In this study, we investigated the effect of two levels of transient glare on brightness perception for several combinations of mesopic reference test luminances (Lts) and background luminances (Lbs). While brightness perception was affected by Lb, there were no appreciable effects for changes in the Lt.

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In this study we present the comparison of the performance of two systems to measure intraocular scattering. Measurements were made by using a psychophysical system based on a brightness comparison method that provides a glare index and a physical system based on the double-pass technique, which gives an objective scatter index by measuring the optical quality of the eye. Three external diffuser filters that simulated different grades of intraocular scattering were used in subjects with normal vision.

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