Psychophysical evaluation of achromatic and chromatic vision of workers chronically exposed to organic solvents.
The purpose of this paper was to evaluate achromatic and chromatic vision of workers chronically exposed to organic solvents through psychophysical methods. Thirty-one gas station workers (31.5 ± 8.4 years old) were evaluated. Psychophysical tests were achromatic tests (Snellen chart, spatial and temporal contrast sensitivity, and visual perimetry) and chromatic tests (Ishihara's test, color discrimination ellipses, and Farnsworth-Munsell 100 hue test--FM100). Spatial contrast sensitivities of exposed workers were lower than the control at spatial frequencies of 20 and 30 cpd whilst the temporal contrast sensitivity was preserved. Visual field losses were found in 10-30 degrees of eccentricity in the solvent exposed workers. The exposed workers group had higher error values of FM100 and wider color discrimination ellipses area compared to the controls. Workers occupationally exposed to organic solvents had abnormal visual functions, mainly color vision losses and visual field constriction.
Instituto de Ciências Biológicas, Universidade Federal do Pará, 66075-110 Belém, PA, Brazil.
Eliza Maria da Costa Brito
EM
Lacerda
Monica Gomes
MG
Lima
Anderson Raiol
AR
Rodrigues
Cláudio Eduardo Correa
CE
Teixeira
Lauro José Barata
LJ
de Lima
Dora Fix
DF
Ventura
Luiz Carlos de Lima
LC
Silveira
D000328:Adult; D003118:Color Perception; D003117:Color Vision Defects / Q000139:chemically induced*; D015350:Contrast Sensitivity; D005260:Female; D006801:Humans; D008297:Male; D009784:Occupational Diseases / Q000139:chemically induced*; D016273:Occupational Exposure / Q000009:adverse effects*; D009930:Organic Chemicals / Q000009:adverse effects* / Q000633:toxicity; D011601:Psychophysics; D012997:Solvents / Q000009:adverse effects* / Q000633:toxicity; D014792:Visual Acuity; D058609:Visual Field Tests; D055815:Young Adult
D009930:Organic Chemicals; D012997:Solvents