Enhancement of Contrast Sensitivity and Losses of Chromatic Discrimination with Tinted Lenses

Sáiz, Dolores de Fez; Luque, Marı́a José; Viqueira, Valentín

doi:10.1097/00006324-200209000-00010

Cited by 57 publications

(50 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…148,149 They cause a tritan-like defect with discrimination losses in the yellowpurplish region. 148 Indeed, blue-blocking sunglasses cause moderate colour confusion.…”

Section: Filtering Blue Light: the Use Of Yellow Filtersmentioning

confidence: 99%

“…148,149 They cause a tritan-like defect with discrimination losses in the yellowpurplish region. 148 Indeed, blue-blocking sunglasses cause moderate colour confusion. 150 A study with Hoya yellow tinted IOL blue blockers (UVCY IOL) compared with ultraviolet IOL and non-ultraviolet IOLs in individuals with normal colour vision 151 found that the yellow lens (UVCY IOL) best approximated the colour sensitivity of healthy eyes.…”

Section: Filtering Blue Light: the Use Of Yellow Filtersmentioning

confidence: 99%

See 1 more Smart Citation

Intraocular lens short wavelength light filtering

Edwards¹,

Gibson

2010

Clinical and Experimental Optometry

View full text Add to dashboard Cite

There is increasing interest in the effects of reactive oxygen species ('free radicals') in ageing, both in the body overall and specifically in the eye. Cataract and age-related macular degeneration (AMD) are two major causes of blindness, with cataract accounting for 48 per cent of world blindness and AMD accounting for 8.7 per cent. Both cataract and AMD affect an older population (over 50 years of age) and while cataract is largely treatable provided resources are available, AMD is a common cause of untreatable, progressive visual loss. There is evidence that AMD is linked to exposure to short wavelength electromagnetic radiation, which includes ultraviolet, blue and violet wavelengths. The ageing crystalline lens provides some protection to the posterior pole because, as it yellows with age, its spectral absorption increasingly blocks the shorter wavelengths of light. Ultraviolet blocking intraocular lenses (IOLs) have been the standard of care for many years but a more recent trend is to include blue-blocking filters based on theoretical benefits. As these filters absorb part of the visible spectrum, they may affect visual function. This review looks at the risks and the benefits of filtering out short wavelength light in pseudophakic patients.

show abstract

“…148,149 They cause a tritan-like defect with discrimination losses in the yellowpurplish region. 148 Indeed, blue-blocking sunglasses cause moderate colour confusion.…”

Section: Filtering Blue Light: the Use Of Yellow Filtersmentioning

confidence: 99%

Section: Filtering Blue Light: the Use Of Yellow Filtersmentioning

confidence: 99%

Intraocular lens short wavelength light filtering

Edwards¹,

Gibson

2010

Clinical and Experimental Optometry

View full text Add to dashboard Cite

show abstract

“…Eq. 3 is a straightforward extension to three-dimensional color space of the formula proposed by de Fez et al 57 for achromatic images. Note that contrast sensitivity is measured only at a single point, but many pathology involve spatially localized damage.…”

Section: The Spatiochromatic Corresponding Pair Algorithmmentioning

confidence: 99%

Images Perceived After Chromatic or Achromatic Contrast Sensitivity Losses

Luque

Capilla²,

Sáiz³

et al. 2010

Optometry and Vision Science

View full text Add to dashboard Cite

Purpose. We simulate how subjects with losses in chromatic and achromatic contrast sensitivity perceive colored images by using the spatiochromatic corresponding pair algorithm. Methods. This is a generalized version of the algorithm by Capilla et al. (J Opt Soc Am (A) 2004;21:176 -186) for simulating color perception of color deviant subjects, which incorporates a simple spatial vision model, consisting of a linear filtering stage, with a band-pass achromatic filter and two low-pass chromatic ones, for the red-green and blue-yellow mechanisms. These filters, except for the global scaling, are the subject's contrast sensitivity functions measured along the cardinal directions of the color space. In its present form, the algorithm would serve to simulate alterations both in the spectral sensitivities and in the contrast sensitivities of the visual mechanisms. Results. After a preliminary theoretical study on the effect of frequency selective and overall reductions in the contrast sensitivity function of a single mechanism, we present cases of real subjects with glaucoma and diabetes, suffering alterations of different magnitude in the three mechanisms. Conclusions. The simulations allow us to learn about the different types of distortions that can be experienced by a subject with impaired contrast sensitivities (blur, haloes, color shifts, local or global contrast, brightness and colorfulness reductions, etc.) and highlight the difficulties arising when trying to predict the quality of the final image from the losses in the individual mechanisms.

show abstract

“…Over the years many experiments have been carried out about the effect of the yellow filters on the visual perception [1][2][3][4][5][6][7][8]. However, there is no clear answer to the question: can the yellow filters improve vision?…”

Section: Introductionmentioning

confidence: 99%

“…Such filters would supposedly decrease the chromatic aberration of the eye and the intraocular stray light. If the image quality is optically improved, the increase both in the visual acuity and in the contrast sensitivity should be expected; however, the improvement of the contrast sensitivity is not unequivocal [3][4][5][6] and the visual acuity, looking through yellow filters, does not increase [3,7,8]. The improvement of the image perception with yellow filters would be more connected with neural factors (for instance, apparent increase of brightness), not optical ones [1,2].…”

Section: Introductionmentioning

confidence: 99%

Effect of Yellow Filters on the Vision

Slica¹,

Ikaunieks²,

Rinkus³

2010

Latvian Journal of Physics and Technical Sciences

View full text Add to dashboard Cite

In the literature, controversial information could be found whether the yellow filters may improve the quality of vision. To find out what is the effect of yellow filters on the quality of vision, 27 individuals were examined for the contrast sensitivity using the Pelli-Robson chart, under normal (photopic) and reduced (mesopic) illumination. The measurements were carried out with and without yellow filters (light transmission 67%, measured with an Ocean Optic spectrometer). Also, the measurements were taken using a grey filter with transmission close to that of the yellow filter (73%). The results did not show statistically significant improvement when looking through yellow filters. However, 56% of the individuals asserted that under reduced illumination they found it more agreeable to look through yellow filters. Two persons were extra tested for low contrast visual acuity using a computerized test and objective measurements by the visual evoked potentials (VEP) method. These visual measurements also did not show statistically significant improvement of the visual contrast sensitivity when yellow filters were used.Our measurements do not confirm the data found in literature about the vision improvement owing to yellow filters. However, the mentioned above subjective improvement at using yellow filters in mesopic conditions shows that under very low illumination such filters may slightly increase the visual quality.

show abstract

Enhancement of Contrast Sensitivity and Losses of Chromatic Discrimination with Tinted Lenses

Cited by 57 publications

References 22 publications

Intraocular lens short wavelength light filtering

Intraocular lens short wavelength light filtering

Images Perceived After Chromatic or Achromatic Contrast Sensitivity Losses

Effect of Yellow Filters on the Vision

Contact Info

Product

Resources

About