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

Abstract

IntroductionThe 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.MethodsMonocular 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.ResultsNo 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.ConclusionBlue-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.

The impact of age-related cataracts on colour perception, postoperative recovery and related spectra derived from test of hue perception

“…However, no observable hue perception trend across the entire colour spectrum has been reported. In the present study, to avoid the effects of blue light-filtering IOL on perception along the blue-yellow axis or sensitivity to blue light spectrum under mesopic light condition [32, 42], we recruited patients implanted with UV light-filtering IOL in the patient group. PES analyses on the FM circuit revealed that postoperative photopic hue discrimination changes were most prominent in yellow, greenish yellow, yellow green, yellowish green, green and bluish green surface colours, which broadened to include greenish blue under mesopic condition.…”

Measurement of Force Required for Anterior Displacement of Intraocular Lenses and Its Defining Parameters

“…Cataract surgery involving the implantation of clear IOLs has increased light transmittance at approximately 410 nm that might be associated with the risk of age-related macular degeneration [14]. To minimize this, yellow-tinted IOLs that absorb blue light are available [3,[14][15][16][17][18][19].…”

“…Cataract surgery involving the implantation of clear IOLs has increased light transmittance at approximately 410 nm that might be associated with the risk of age-related macular degeneration [ 14 ]. To minimize this, yellow-tinted IOLs that absorb blue light are available [ 3 , 14 , 15 , 16 , 17 , 18 , 19 ]. A bulky haptic, such as those of the foldable one-piece IOLs can hamper capsular bend formation and adhesion [ 13 , 20 , 21 , 22 , 23 ].…”

Is the blue light filter for spectacle and intraocular lenses helpful in improving ocular health? A systematic review of the literature

“…The subjective impression showed in all participants a better color vision under blue light filter condition. To summarize, no quantitative differences were found in the luminance sensitive between both types of lenses, although the blue light filter was reported to be more comfortable than the transparent filter 23 .…”