Potencial visual evocado em portadores de hanseníase

Neto, João Lins de Andrade; Cunha, Ana Paula; Barreto, Raquel Barbosa Paes; Arantes, Tiago Eugênio Faria e; Santos, Laura Patrícia Ferreira

doi:10.1590/s0004-27492006000400022

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…In both protocols, the following procedure was used: the participants had the task of identifying one of the four possible orientations of the opening of the stimulus test "Landolt C" when they appeared on the monitor screen. Each stimulus lasted 300 ms (Mollon & Regan, 2000). The chromaticity of the stimulus varied according to the participant's response, approaching the background for each correct response.…”

Section: Methodsmentioning

confidence: 99%

Visual processing of color and shape in people with leprosy

Soares

Andrade

et al. 2020

Psicol. Refl. Crít.

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The aim of this study was to analyze the contrast sensitivity of spatial luminance and the color discrimination thresholds of the protan, deutan, and tritan axes of people with leprosy. This study included 8 subjects with leprosy (M = 4, W = 4, M = 33.38 ± 8.7) and 8 healthy subjects (M = 4, W = 4, M = 30.89 ± 5.8). The contrast sensitivity was evaluated by the Metropsis software version 11.0 with vertical sinusoidal grids of frequencies of 0.2, 0.5, 1, 5, 10, and 16 cycles per degree of visual angle (cpd) and color vision by the desaturated Lanthony D15 tests and the trivector and ellipse protocols of the Cambridge Color Test. The results showed significant differences between the groups in the processing of spatial frequencies of 0.2 (U = 14; p = .018); 5.0 (U = 45.0; p = .001); 10.0 (U = 45.0; p = .001), and 16.0 (U = 45.0; p = .001) cpd. The difference in color recognition through D15d (U = 4.0; p = .002). Ellipse 2 (U = 10.0; p = .012) and ellipse 3 (U = 9.0; p = .009) were discriminated against. Overall, the results indicate that leprosy changes the visual processing of low, medium, and high spatial frequencies, as well as the sensitivity of the short wavelength (tritan line of confusion) and long (protan line of confusion) cones.

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Section: Methodsmentioning

confidence: 99%