Actively Recruiting
Clinical Evaluation of Low Contrast Visual Performance and Low Light Phenomena in Patients With Various Intraocular Lens Implants
Led by Dr. Daniel H. Chang, MD · Updated on 2026-04-06
120
Participants Needed
1
Research Sites
44 weeks
Total Duration
On this page
Sponsors
D
Dr. Daniel H. Chang, MD
Lead Sponsor
J
Johnson & Johnson Surgical Vision, Inc.
Collaborating Sponsor
AI-Summary
What this Trial Is About
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
CONDITIONS
Official Title
Clinical Evaluation of Low Contrast Visual Performance and Low Light Phenomena in Patients With Various Intraocular Lens Implants
Who Can Participate
Eligibility Criteria
You may qualify if you...
- 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
- Ability to understand and respond to a questionnaire in English
You will not qualify if you...
- Any clinically significant pupil abnormalities such as non-reactive, fixed, or abnormally shaped pupils
- Inability to focus or fixate for prolonged periods of time (e.g., due to strabismus, nystagmus)
- Uncorrected distance visual acuity worse than 20/25 in either eye
- Prior corneal refractive surgery (LASIK, LASEK, RK, PRK, etc.) or intraocular surgery, except certain acceptable procedures
- Posterior capsular opacification with grading worse than 1+
- Ocular findings that may affect vision and/or contrast sensitivity as judged by the investigator
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Trial Site Locations
Total: 1 location
1
Empire Eye and Laser Center
Bakersfield, California, United States, 93309
Actively Recruiting
Research Team
B
Brittany M Camirand
CONTACT
D
Daniel H Chang, MD
CONTACT
How is the study designed?
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
3
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