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This is a single-masked, bilateral, controlled, randomized, 2x2 crossover, non-dispensing clinical trial to characterize the effects of an HEV-Blocker on several measures of visual function in a presbyopic population.
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Inclusion and exclusion criteria
Inclusion Criteria:
Potential subjects must satisfy all of the following criteria to be enrolled in the study:
Read, understand, and sign the STATEMENT OF INFORMED CONSENT and receive a fully executed copy of the form
Appear able and willing to adhere to the instructions set forth in this clinical protocol.
Be between at least 40 and not more than 70 years of age at the time of screening.
Possess a wearable pair of spectacles that provide correction for distance vision.
Be an adapted soft contact lens wearer in both eyes (i.e. worn lenses a minimum of 2 days per week for at least 8 hours per wear day, for 1 month of more duration).
Be wearing a presbyopic contact lens correction (e.g., reading spectacles over contact lenses, multifocal or monovision contact lenses, etc.) or if not respond positively to at least one symptom on the "Presbyopic Symptoms Questionnaire".
The subject must have normal color perception as evidenced by reading 17 out of the first 21 Ishihara plates correctly.
The subject's distance spherical equivalent of their refraction must be in the range of -1.00 D to -4.00 D.
The subject's refractive cylinder must be ≤0.75 D in each eye.
The subject's ADD power must be in the range of +0.75 D to +2.50 D in each eye.
The subject must have best corrected distance visual acuity of 20/20-3 or better in each eye.
Exclusion Criteria:
Potential subjects who meet any of the following criteria will be excluded from participating in the study:
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37 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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