RT Journal Article
T1 Case Report: Effect of Haploscopic Filter on Contrast Sensitivity Function and Colour Vision Tests
A1 González Pérez, Javier
A1 Rodríguez Daporta, Eloy
A1 Mira Pérez, Jorge
K1 Color vision plates
K1 Asymmetric haploscopic filter
K1 Color vision deficiency
K1 Contrast sensitivity function
K1 Color vision tests
AB Significance:The options that can help subjects with congenital color vision defect, to a better professional and leisure adaptation, are very limited. Different haploscopic lenses can be considered, and their effects need to be investigated in patients with different defect.Purpose:The purpose of this study was to present and discuss the effect of a pair of asymmetric longpass filters fitted for deuteranopia, with the result of a 60% improvement on distinguishing red-green plates when compared with baseline.Case Report:We report a case of a 51-year-old male with congenital deuteranopia fitted with haploscopicChromagen filters. During the 2-month follow-up, we observed a decrease in left eye logMARvisual acuity and contrast sensitivity with an increased ability to discriminate the plates ofdifferent color vision tests (Ishihara, Farnsworth and Hardy-Rand-Rittler). The visualoutcomes are discussed considering the spectral sensitivity curves of each filter, measuredwith a spectrophotometric device.Conclusions:This report describes an improvement in the ability to resolve color vision plates after usingasymmetric haploscopic filters showing a left eye decrease in logMAR visual acuity andcontrast sensitivity function. Subjects with a history of color vision deficiency might benefitfrom using haploscopic filters that selectively minimize the transmittance within a specificbandwidth in order to improve the color discrimination in deutan colour vision deficiency. Thesimultaneous analysis of the color vision outcomes and transmittance spectrum of thehaploscopic filters might contribute to a better understanding of the mechanisms behind theclaimed efficacy of these devices.
PB Lippincott
PB Williams & Wilkins
SN 1040-5488
YR 2020
FD 2020
LK http://hdl.handle.net/10347/32707
UL http://hdl.handle.net/10347/32707
LA eng
NO González-Pérez, Javier OD, PhD∗; Rodríguez Daporta, Eloy OD; Mira, Jorge PhD. Case Report: Effect of Haploscopic Filter on Contrast Sensitivity Function and Color Vision Tests. Optometry and Vision Science 97(12):p 1034-1040, December 2020. | DOI: 10.1097/OPX.0000000000001614
NO This is a non-final version of an article published in final form in González-Pérez, Javier OD, PhD∗; Rodríguez Daporta, Eloy OD; Mira, Jorge PhD. Case Report: Effect of Haploscopic Filter on Contrast Sensitivity Function and Color Vision Tests. Optometry and Vision Science 97(12):p 1034-1040, December 2020. | DOI: 10.1097/OPX.0000000000001614
NO We thank the Photonics4Life group from Universidade de Santiago de Compostela for technical assistance in spectrophotometric analysis of CGs lenses.
DS Minerva
RD 29 abr 2026