Clinical Evaluation of Low Contrast Defocus Curves, Low Light Photic Phenomena, and Dysphotopsia Profiles in Pseudophakic Patients
Dr. Daniel H. Chang, MD
Summary
The goal of this clinical investigation is to evaluate visual acuity and contrast sensitivity in low lighting conditions using several different testing devices, and measure nighttime side effects of intraocular lens (IOL) implants after cataract surgery. Researchers will compare the results for three different types of IOLs to see how each lens contributes to overall visual function, patient experience and satisfaction. Participants will: * Complete two different questionnaires about their current vision * Undergo visual testing using several different devices
Description
The purpose of the study is to correlate the low contrast defocus curves, objective halometry measurement of low light photic phenomena, and patient reported dysphotopsia profiles of the various study IOLs. The primary endpoints are low (50%) contrast defocus curve, halometry (cool white light) assessment of photic phenomena, and PRVSQv2 results. The secondary endpoints are: * Visual Acuity * BCDVA * Low contrast (50%) BCDVA * Contrast Sensitivity * High contrast defocus curve * Halometry: * Light levels: low, medium, high * Colors: cool white, warm white, red, green * Characterization of g…
Eligibility
- Age range
- 22+ years
- Sex
- All
- Healthy volunteers
- No
Inclusion Criteria: * Minimum 22 years of age * Bilateral pseudophakia, at least 3 months postoperative from IOL implantation, with one of the study IOL models in at least one eye. * Availability, willingness, and sufficient cognitive awareness to comply with examination procedures * Signed informed consent and HIPAA authorization or equivalent documentation necessary to comply with applicable privacy laws pertaining to medical treatment in the governing countries * Ability to understand and respond to a questionnaire in English Exclusion Criteria: * Any clinically significant pupil abnorma…
Interventions
- OtherNone-placebo
No interventions.
Location
- Empire Eye and Laser CenterBakersfield, California