VisionApp test for ghosting in single-eye (monocular) vision
Assessment of the Accuracy and Repeatability of the VisionApp - Ghosting Measurement Protocol
This test tries the VisionApp smartphone app to see if it can accurately measure ghosting in people with monocular diplopia.
Quick facts
| Phase | Not applicable |
|---|---|
| Study type | Interventional |
| Enrollment | 12 (estimated) |
| Ages | 8 Years and up |
| Sex | All |
| Sponsor | Indiana University Academic / other |
| Locations | 1 site (Bloomington, Indiana) |
| Trial ID | NCT07571538 on ClinicalTrials.gov |
What this trial studies
Researchers will compare VisionApp measurements to standard clinical tests by having participants complete refraction, visual acuity checks, and lighting controls at the Clinical Optics Research Lab. Participants will wear a single-vision contact lens in one eye and two different multifocal lenses in the other eye while reporting perceived shadows or distortions using slider bars and numerical ratings. The protocol includes both adults and children with age-appropriate multifocal lenses and uses randomization to determine lens order. The study will analyze accuracy, repeatability, and reproducibility of the app-based ghosting measurements across sessions.
Who should consider this trial
Good fit: People (adults and children) with plano to -5.00 D refractive error, ≤ -0.75 D astigmatism, recent eye exam, best-corrected visual acuity of 20/20 in each eye, no amblyopia or diagnosed ocular disease, and ability to follow the visit schedule are ideal candidates.
Not a fit: Patients with significant ocular disease, amblyopia, high refractive errors or astigmatism beyond the eligibility limits, systemic conditions or medications affecting vision, or those unable to attend an in-person visit are unlikely to benefit.
Why it matters
Potential benefit: If successful, this could provide a low-cost, easy way to measure and monitor ghosting that helps clinicians and patients choose and compare contact lens options.
How similar studies have performed: Some smartphone refraction tools have shown promising accuracy for measuring refractive error, but using an app specifically to quantify ghosting in monocular diplopia is relatively novel and less validated.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * has a refractive error between Plano and -5.00 D of sphere and cylinder components combined. * has refractive cylinder (e.g., astigmatism) of -0.75 D or less * has had a self-reported oculo-visual exam in the last 2 years * has best-corrected visual acuity of at least 20/20 in each eye * is not amblyopic or does not have any diagnosed ocular disease * is willing and able to follow instructions and maintain the appointment schedule Exclusion Criteria: * has any systemic disease affecting ocular health and visual acuity * is currently using any systemic or topical medications that could affect ocular health and visual acuity * is participating in another eye related research study
Where this trial is running
Bloomington, Indiana
- Clinical Optics Research Lab — Bloomington, Indiana, United States (Recruiting)
Study contacts
- Study coordinator: Pete Kollbaum, PhD
- Email: kollbaum@iu.edu
- Phone: 812-555-5500
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.