VisionApp for Double Vision
What You Need to Know Before You Apply
What is the purpose of this trial?
Recent Android mobile device technology is available which allows user-measured refractive error and reading add power. This technology could be quite useful to the clinical and research community. The current study aims to evaluate the accuracy, repeatability, and reproducibility of one such technology by VisionApp, specifically with regard to ghosting vision.
VisionApp is an app which runs on a smartphone or other device which uses the distance between the user's face and the phone to determine refractive error, while the user looks at different targets (lines, letters, words, etc).
Are You a Good Fit for This Trial?
Inclusion Criteria
Timeline for a Trial Participant
Screening
Participants are screened for eligibility to participate in the trial
Study Visit
Participants undergo demographic and health/ocular history collection, standard clinical testing, and ghosting assessments with different contact lenses
Follow-up
Participants may return for additional testing if unable to complete all assessments in a single session
What Are the Treatments Tested in This Trial?
How Is the Trial Designed?
4
Treatment groups
Active Control
Subjects will be asked to look at letters and describe any shadows or distortions they see using slider bars or numerical rating scales. This will be performed twice, while wearing two different soft multifocal contact lenses in one eye. The order in which the participant wears each of the multifocal contact lenses for these tasks will be randomized. After the assessment while wearing the first multifocal lens is completed, subjects will repeat the task while wearing the second multifocal lens.
Subjects will be asked to look at letters and describe any shadows or distortions they see using slider bars or numerical rating scales. This will be performed twice, while wearing two different soft multifocal contact lenses in one eye. The order in which the participant wears each of the multifocal contact lenses for these tasks will be randomized. After the assessment while wearing the first multifocal lens is completed, subjects will repeat the task while wearing the second multifocal lens.
Subjects will be asked to look at letters and describe any shadows or distortions they see using slider bars or numerical rating scales. This will be performed twice, while wearing two different soft multifocal contact lenses in one eye. The order in which the participant wears each of the multifocal contact lenses for these tasks will be randomized. After the assessment while wearing the first multifocal lens is completed, subjects will repeat the task while wearing the second multifocal lens.
Subjects will be asked to look at letters and describe any shadows or distortions they see using slider bars or numerical rating scales. This will be performed twice, while wearing two different soft multifocal contact lenses in one eye. The order in which the participant wears each of the multifocal contact lenses for these tasks will be randomized. After the assessment while wearing the first multifocal lens is completed, subjects will repeat the task while wearing the second multifocal lens.
Find a Clinic Near You
Who Is Running the Clinical Trial?
Indiana University
Lead Sponsor
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