Inner and Outer Retinal Contributions to Pupillary Light Response: Correlation to Functional and Morphologic Parameters in Glaucoma.

Autor:	Duque-Chica GL; Experimental Psychology Department, Institute of Psychology, University of Sao Paulo.; Department of Psychology, University of Medellin, Medellin, Colombia., Gracitelli CPB; Department of Ophthalmology and Visual Science, Federal University of Sao Paulo., Moura ALA; Experimental Psychology Department, Institute of Psychology, University of Sao Paulo.; Department of Ophthalmology and Visual Science, Federal University of Sao Paulo., Nagy BV; Experimental Psychology Department, Institute of Psychology, University of Sao Paulo.; Department of Mechatronics, Optics and Engineering Informatics, Budapest University of Technology and Economics, Budapest, Hungary., Vidal KS; Experimental Psychology Department, Institute of Psychology, University of Sao Paulo.; Prevent Senior Institute, Sao Paulo, Brazil., Paranhos A Jr; Department of Ophthalmology and Visual Science, Federal University of Sao Paulo., Ventura DF; Experimental Psychology Department, Institute of Psychology, University of Sao Paulo.
Jazyk:	angličtina
Zdroj:	Journal of glaucoma [J Glaucoma] 2018 Aug; Vol. 27 (8), pp. 723-732.
DOI:	10.1097/IJG.0000000000001003
Abstrakt:	Purpose: To evaluate in patients with primary open-angle glaucoma (POAG) the contribution of the inner and outer retinal photoreceptors to the pupillary light responses (PLRs) correlated with both functional (color vision and visual field perimetry) and morphologic (optical coherence tomography) parameters. Methods: In total, 45 patients with POAG and 25 healthy control participants were evaluated. The PLR was measured as pupil diameter with an eye tracker; stimuli were presented in a Ganzfeld. Pupil responses were measured monocularly, to 1 second blue (470 nm) and red (640 nm) flashes with -3, -2, -1, 0, 1, 2, and 2.4 log cd/m luminance levels. Color vision was evaluated with the Cambridge Color Test, visual field was measured by standard automatic perimetry, and retinal nerve fiber layer thickness was evaluated by optical coherence tomography. Results: Patients with moderate and severe POAG have a significantly decreased PLR that depends on the severity of POAG, for both the 470 and 640 nm stimuli, revealing the reduction of the contributions of the rods, cones, and intrinsically photosensitive retinal ganglion cells to PLR. A significant loss of color discrimination along the blue-yellow axis was observed in all stages of POAG. Correlations among standard automatic perimetry, retinal nerve fiber layer thickness, Cambridge Color Test, PLR, and melanopsin parameters were found. Conclusions: The results provide evidence that in moderate and severe stages of POAG, both the inner and outer retinal contributions to PLR are affected. Also, a worsening in color vision was correlated with reduced PLR responses at high-intensity stimuli. These findings may enhance the clinical management of POAG patients.
Databáze:	MEDLINE
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