Clinical Evaluation of Low Contrast Defocus Curves, Low Light Photic Phenomena, and Dysphotopsia Profiles in Pseudophakic Patients

What this Trial Is About

Researchers are studying how different types of intraocular lenses (IOLs) affect visual performance in low light and low contrast conditions after cataract surgery. The study compares three IOL models to understand their impact on vision, nighttime side effects, and patient satisfaction. The goal is to better correlate objective measures with patient-reported visual experiences, including dysphotopsia, which are visual disturbances like glare or halos. Participants will be grouped based on the type of Tecnis intraocular lens they have received: Monofocals, Symfony Optiblue, or Odyssey models. They will complete questionnaires about their vision and undergo a variety of visual tests using specialized devices. These tests include measuring visual acuity, contrast sensitivity, pupil size, defocus curves, and photic phenomena under different lighting and color conditions. The study also includes slit-lamp exams and intraocular pressure measurements. During the study visit, participants will answer two vision questionnaires in random order and undergo multiple eye exams and tests to assess their visual function and symptoms. Researchers will track outcomes such as low contrast defocus curve, halometry, and patient questionnaire results. Secondary measures include best corrected distance visual acuity, contrast sensitivity, pupil size, and evaluation for posterior capsular opacification or need for YAG capsulotomy. The study begins in September 2025 and will continue through August 2026.

Clinical Evaluation of Low Contrast Visual Performance and Low Light Phenomena in Patients With Various Intraocular Lens Implants