Psychophysical Measurements of Luminance Contrast Sensitivity and Color Discrimination with Transparent and Blue-Light Filter Intraocular Lenses

Psychophysical Measurements of Luminance Contrast Sensitivity and Color Discrimination with Transparent and Blue-Light Filter Intraocular Lenses

Author da Costa, Marcelo Fernandes Google Scholar
Paranhos Junior, Augusto Autor UNIFESP Google Scholar
Lottenberg, Claudio Luiz Google Scholar
Castro, Leonardo Cunha Autor UNIFESP Google Scholar
Ventura, Dora Fix Google Scholar
Abstract The purpose of this study was to measure luminance contrast sensitivity and color vision thresholdfs in normal subjects using a blue light filter lens and transparent intraocular lens material. Monocular luminance grating contrast sensitivity was measured with Psycho for Windows (version 2.36; Cambridge Research Systems) at 3.0, 6.0, 12.0, 20.0, and 30.0 cycles per degree of visual angle (cpd) in 15 normal subjects (eight female), with a mean age of 21.6 years (SD = 3.8 years). Chromatic discrimination was assessed with the Cambridge colour test (CCT) along the protan, deutan, and tritan color confusion axes. Both tests were performed in a darkened room under two situations: with a transparent lens and with blue light filter lens. Subjective impressions were taken by subjects regarding their visual experience under both conditions. No difference was found between the luminance contrast sensitivity measured with transparent and blue light filter. However, 13/15 (87%) of the subjects reported more comfortable vision with the blue filter. In the color vision test, tritan thresholds were significantly higher for the blue filter compared with the transparent filter (p = 0.003). For protan and deutan thresholds no differences were found. Blue-yellow color vision is impaired with the blue light filter, and no impairment occurs with the transparent filter. No significant differences in thresholds were found in the luminance contrast sensitivity comparing the blue light and transparent filters. The impact of short wavelength light filtering on intrinsically photosensitive retinal ganglion cells is also discussed.
Keywords Blue filter IOL
Chromatic filtering
Chromaticity discrimination
Color vision impairment
Luminance contrast sensitivity
xmlui.dri2xhtml.METS-1.0.item-coverage Cham
Language English
Sponsor FAPESP Projeto Tematico
FINEP
CNPq
Grant number FAPESP Projeto Tematico: 02/12733-8
FINEP: 66.95.0407.00
CNPq: 523303/95-5
Date 2017
Published in Ophthalmology And Therapy. Cham, v. 6, n. 2, p. 301-312, 2017.
ISSN 2193-8245 (Sherpa/Romeo, impact factor)
Publisher Springer International Publishing Ag
Extent 301-312
Origin http://dx.doi.org/10.1007/s40123-017-0101-y
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000415873600009
URI https://repositorio.unifesp.br/handle/11600/58133

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