Impact of Color Correcting Lenses on Color Vision Deficiency
Color Blindness, Color Vision Defects, Color Blindness, Green
About this trial
This is an interventional basic science trial for Color Blindness focused on measuring Color-Correcting Lenses
Eligibility Criteria
Inclusion Criteria:
- no reported history of eye, systemic or ocular disease
- VA of 20/30 in each eye
- hereditary color vision deficient (CVDs) verified by failing scores on the red-green anomaloscope (outside system normal range) and Ishihara testing (3 or more errors on 14 testable plates)
- color vision normal (CVNs) verified by passing red-green anomaloscope (outside system normal range) and Ishihara testing (3 or more errors on 14 testable plates)
Exclusion Criteria:
- reported use of sleep-inducing or wakefulness drugs
Sites / Locations
- University of the Incarnate Word Rosenberg School of OptometryRecruiting
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Arm 5
Experimental
Placebo Comparator
Experimental
Placebo Comparator
Active Comparator
Color Vision Deficient with Color Correcting Lenses
Color Vision Deficient with Placebo Lenses
Crossover: Placebo to Experimental
Crossover: Experimental to Placebo
Control Group: Subjects with Normal Color Vision
10 subjects confirmed to have hereditary color vision deficiency randomly assigned to experimental group 1 which includes baseline testing with and without color correcting lenses, followed by 7 days of wear, minimum 3 hours/day, followed by retesting with and without color correcting lenses.
10 subjects confirmed to have hereditary color vision deficiency randomly assigned to Placebo Group 1 which includes baseline testing with and without placebo lenses, followed by 7 days of wear, minimum 3 hours/day, followed by retesting with and without placebo lenses.
Placebo Group 1 crosses over to become Experimental Group 2 which includes baseline testing with and without color correcting lenses, followed by 7 days of wear, minimum 3 hours/day, followed by retesting with and without color correcting lenses.
Experimental Group 1 crosses over to become Placebo Group 2 which includes baseline testing with and without placebo lenses, followed by 7 days of wear, minimum 3 hours/day, followed by retesting with and without placebo lenses.
Fifteen subjects confirmed to have normal color vision will be tested in a single session to determine whether color correcting lenses affect color vision in color vision normal subjects and to provided normative data for several unique measures of color vision performance