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

Dr. Daniel H. Chang, MD120 enrolled

Overview

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

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 glare, starbursts, and halos * PRO questionnaires * AIOLIS * Patient satisfaction and recommendation survey * Pupil size * YAG capsulotomy within 1 year * Posterior capsular opacification: pre-planned post-hoc analysis evaluating performance in patients w/wo PCO Monocular BCDVA Participants will: * Complete PRVSQ v2 and AIOLIS vision questionnaires in a randomized order. * Undergo the following visual testing using M\&S, clinical halometry, and the manifold vision meter devices: * Manifest refraction * Distance visual acuity * Defocus testing * Low contrast testing * Contrast sensitivity * Pupilometry * Halometry * Biomicroscopic slit-lamp exam * Intraocular pressure * Non-directed ocular symptoms

Study Type

OBSERVATIONAL

Enrollment

120

Conditions

Dysphotopsia Posterior Capsule Opacification

Eligibility

Sex: ALLMin age: 22 Years

Medical Language ↔ Plain English

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 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

Outcomes

Primary Outcomes

Low (50%) contrast defocus curve

Measured low (50%) contrast defocus curve compared between all three groups

Time frame: Day 1

Halometry assessment of photic phenomena

Halometry assessment of halos and starbursts utilizing a cool white light with varying intensities. Comparing the measured size of the ring (deg) of each condition between all three groups.

Time frame: Day 1

PRVSQv2 questionnaire results

PRVSQv2 questionnaire results compared between all three groups: Frequency and bother/severity of symptoms (scale 1 to 5, with 5 most bothersome)

Time frame: Day 1

Secondary Outcomes

Best corrected distance visual acuity (BCDVA)

Best corrected distance visual acuity (BCDVA) compared between all three groups

Time frame: Day 1

Low contrast (50%) BCDVA

Low contrast (50%) BCDVA compared between all three groups

Time frame: Day 1

Contrast Sensitivity

Contrast sensitivity compared between all three groups

Time frame: Day 1

High Contrast Defocus Curve

High Contrast Defocus Curve compared between all three groups

Time frame: Day 1

Halometry

Halometry assessment of halos and starbursts utilizing various light colors (cool white, warm white, red, yellow, and green) and intensities. Comparing the measured size of the ring (deg) of each condition between all three groups.

Time frame: Day 1

Patient-Reported Outcome (PRO) Questionnaires

PRVSQv2 and AIOLIS vision questionnaire results compared between all three groups. Frequency and bother/severity of symptoms (scale 1 to 5, with 5 most bothersome)

Time frame: Day 1

Pupil Size

Photopic and mesopic pupil size compared between all three study groups

Time frame: Day 1

YAG Capsulotomies

Number of YAG capsulotomies performed within one year post-op compared between all three groups

Time frame: Day 1

Posterior capsular opacification (PCO)

Pre-planned post-hoc analysis evaluating number of participants with and without PCO compared between all three groups

Time frame: Day 1

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

Overview

Conditions

Interventions

Eligibility

Locations (1)

Outcomes

Primary Outcomes

Secondary Outcomes

Central Contacts