An automated instrument designed to determine visual photosensitivity thresholds
Posted on 2018-10-18 - 17:43
The Ocular Photosensitivity Analyzer (OPA), a new automated instrument to quantify the visual photosensitivity thresholds (VPT) in healthy and light sensitive subjects, is described. The OPA generates light stimuli of varying intensities utilizing unequal ascending and descending steps to yield the VPT. The performance of the OPA was evaluated in healthy subjects, as well as light sensitive subjects with achromatopsia or traumatic brain injury (TBI). VPT in healthy, achromatopsia, and TBI subjects were 3.2 ± 0.6 log lux, 0.5 ± 0.5 log lux, and 0.4 ± 0.6 log lux, respectively. Light sensitive subjects manifested significantly lower VPT compared to healthy subjects. Longitudinal analysis revealed that the OPA reliably measured VPT in healthy subjects.
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Aguilar, Mariela; Gonzalez, Alex; Rowaan, Cornelis; de Freitas, Carolina; Alawa, Karam; Durkee, Heather; et al. (2018). An automated instrument designed to determine visual photosensitivity thresholds. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.4188584.v1
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AUTHORS (10)
MA
Mariela Aguilar
AG
Alex Gonzalez
CR
Cornelis Rowaan
Cd
Carolina de Freitas
KA
Karam Alawa
HD
Heather Durkee
WF
William Feuer
FM
Fabrice Manns
SA
Shihab Asfour
BL
Byron Lam