Performance of Red Tinted Contact Lenses on Colour Defects — CL  

Color Vision Defects Clinical Trial

Official title: The Performance of Red Tinted Contact Lenses of Various Tones on Colour Deficient Subjects: A Pilot Study

Status Completed

Clinical Trial Summary

This study aimed to relate and compare the performance of 4 types of red-tinted contact lenses (CL) with the Total Error Score (TES) from the Farnsworth-Munsell 100 Hue test on colour deficient subjects. Only 6 subject with colour vision defect was tested in this study.

Clinical Trial Description

Six congenital CVD subjects were recruited. After colour vision screening using Ishihara plate, the Farnsworth-Munsell 100 Hue test was carried out to determine the type and severity of colour vision deficiency. Four types of red-tinted CL (Type A, B, C and D) were used. The performance of each of these lenses was determined through the comparison of error scores in the Ishihara test before and after wearing tinted contact lens on only the non-dominant eye. Then, the transmittance of each tinted CL was determined using a spectrophotometer. All these lenses were fitted on the subjects in one day where the subjects were given a 30-minute break for each intervention. ;

Related Conditions & MeSH terms

• Blindness
• Color Vision Defects

• NCT number: NCT05643222
• Study type: Interventional
• Source: National University of Malaysia
• Status: Completed
• Phase: N/A
• Start date: October 20, 2020
• Completion date: July 31, 2021