Clinical Evaluation of Low Contrast Visual Performance and Low Light Phenomena in Patients
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 o
| Condition(s) | Dysphotopsia, Posterior Capsule Opacification, Visual Acuity, Visual Function, Contrast Sensitivity |
|---|---|
| Status | Recruiting |
| Study type | Observational |
| 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 |
| Who can participate | 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 abnormalities (non-reactive, fixed pupils, or abnormally shaped pupils. * Inability to focus or fixate for prolonged periods of time (e.g., due to strabismus, nystagmus, etc.) * Uncorrected distance visual acui |
| Ages | 22 Years |
| Sex | All |
| Lead sponsor | Dr. Daniel H. Chang, MD |
| Locations | Bakersfield, California, United States |
| Start date | 2025-09-24 |
| NCT ID | NCT07213167 |
| Official listing | https://clinicaltrials.gov/study/NCT07213167 |