Clinical Evaluation of Low Contrast Visual Performance and Low Light Phenomena in Patients With Various Intraocular Lens Implants
Recruiting now · Has a placebo group
Conditions studied: Dysphotopsia, Posterior Capsule Opacification, Visual Acuity, Visual Function, Contrast Sensitivity
In brief
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
Key facts
- Study ID
- NCT07213167
- Run by
- Dr. Daniel H. Chang, MD
- People needed
- 120
- Starts
- 2025-09-24
- Expected to finish
- 2026-08-01
- Last updated by the study team
- 2026-04-06
Who can join
Age: 22 and older. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- 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
You may not qualify if…
- 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 acuity worse than 20/25 in either eye
- Prior corneal refractive surgery (LASIK, LASEK, RK, PRK, etc.) or intraocular surgery. Note: Prophylactic peripheral iridotomies and peripheral laser retinal repairs that, in the opinion of the investigator will not confound study outcomes are acceptable.
- Posterior capsular opacification with grading worse than 1+
- Ocular findings that may, in the opinion of the investigator, affect vision and/or contrast sensitivity
Where it is running
- Empire Eye and Laser Center — Bakersfield, California, United States (enrolling)
Full record on ClinicalTrials.gov
Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.