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

<p><b>Article full text</b></p> <p><br></p> <p>The full text of this article can be found here<b>.</b> <a href="https://link.springer.com/article/10.1007/s40123-017-0101-y">https://link.springer.com/article/10.1007/s40123-017-0101-y</a></p><p></p> <p><br></p> <p><b>Provide enhanced content for this article</b></p> <p><br></p> <p>If you are an author of this publication and would like to provide additional enhanced content for your article then please contact <a href="http://www.medengine.com/Redeem/”mailto:[email protected]”"><b>[email protected]</b></a>.</p> <p><br></p> <p>The journal offers a range of additional features designed to increase visibility and readership. All features will be thoroughly peer reviewed to ensure the content is of the highest scientific standard and all features are marked as ‘peer reviewed’ to ensure readers are aware that the content has been reviewed to the same level as the articles they are being presented alongside. Moreover, all sponsorship and disclosure information is included to provide complete transparency and adherence to good publication practices. This ensures that however the content is reached the reader has a full understanding of its origin. No fees are charged for hosting additional open access content.</p> <p><br></p> <p>Other enhanced features include, but are not limited to:</p> <p><br></p> <p>• Slide decks</p> <p>• Videos and animations</p> <p>• Audio abstracts</p> <p>• Audio slides</p

Goulart et al. (2013) - behavioral data

Color discrimination data of ten capuchin monkeys (Sapajus spp), two Female, eight Male. Discrimination thresholds obtained for each monkey in 20 test vectors around three different background coordinates (CIE 1976 u' v' chromaticity diagram). Thresholds are presented in terms of distance from background point (u' v' units x10^-4) and of u' v' coordinates

Genotype, absorption peak, and phenotype for each monkey.

<p>Genotypes are identified by the amino acid combinations at positions 180, 277, and 285 of the opsin, AFA (alanine-phenylalanine-alanine), AFT (alanine-phenylalanine-threonine), and SYT (serine-tyrosine-threonine). The corresponding absorption peaks and phenotypic classification were determined based on Asenjo et al. (1994) and Soares et al. (2010), respectively.</p

Goulart et al. (2013) - genetic data

Amino acid sequences from exons 3 and 5 of the X-linked opsin genes of ten capuchin monkeys (Sapajus spp), two Female, eight Male. Sequencing of exons 3 and 5 allowed the deduction of the amino acid combinations at positions 180, 277, and 285 of the resulting opsins, from which the range of potential absorption maxima of the corresponding photopigments was inferred

Color discrimination thresholds obtained for capuchin monkeys.

<p>The figure shows the thresholds obtained for 20 vectors around the achromatic point of the CIE 1976 u′v′ chromatic diagram (Background 1). The data were grouped according to the phenotypic classification derived from the genetic analysis.</p

Example of the stimulus arrangement adopted in the present study.

<p>A pseudoisochromatic stimulus composed of circles of varying sizes and luminance is shown. The approximately square area with a different hue from background is the target.</p

Discrimination ellipses obtained for capuchin monkeys.

<p>The figure shows the best-fitting ellipses derived from the thresholds obtained in the 20 test vectors for each background. Deuteranopes are represented by data from subject M4.</p

Example of staircases leading to threshold calculation.

<p>The figures shows the sequences produced by a male monkey in a blue-yellow oriented vector (7) and red-green oriented vector (19). Each point represents the distance, in u′v′ units, between the chromaticity points that define the target and background. The distance was decreased following correct responses and increased following incorrect responses.</p

Spectral sensitivity curves of L and M cone pigments from capuchin monkeys

<p>. The maximum absorption peak of the visual pigments were predicted from the amino acid sequences from exons 3 and 5 of the X-linked opsin.</p

Testing phase parameters.

<p>(A) Chromaticity points used as background. (B) Distribution of the 20 test vectors. The CIE 1976 u′v′ coordinates for each background chromaticity are presented. Also shown are the angle and dominant wavelength for each vector tested from the achromatic point (Background 1) of the CIE 1976 u′v′ chromaticity diagram. Negative values refer to vectors that contain “purples and magentas,” which are nonspectral colors and have no dominant wavelength but are described by their complementary dominant wavelength, lying on the opposite side of the diagram.</p