Indiana University
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).
Subjects will be enrolled at the Clinical Optics Research Lab at Indiana University. At the study visit, demographic and health/ocular history may be collected by oral history and standard clinical testing including refraction (check of glasses prescription), auto-refraction or abbrerometry may be performed. Visual acuity and room lighting checks may also be measured using standard clinical techniques. For the experimental portion of the study visit, participants will be asked to look at letters and describe any shadows or distortions they see using slider bars or numerical rating scales, wh…
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 medica…
Proclear 1 day is a commercially available single vision soft contact lens for single use (daily wear). Participants will wear these contacts at the beginning of the study visit to establish best corrected vision. Participants will then continue to wear this contact lens in one eye for the duration of the study visit.
MyDay is a commercially available multifocal soft contact lens for daily wear. Adult participants will assess images for ghosting while wearing a MyDay contact lens in one eye. Order of exposure to this lens will be determined via randomization.
NaturalVue is a commercially available multifocal soft contact lens for daily wear. Adult participants will assess images for ghosting while wearing a NaturalVue contact lens in one eye. Order of exposure to this lens will be determined via randomization.
MiSight 1 Day is a commercially available multifocal soft contact lens for daily wear. Children participants will assess images for ghosting while wearing a MiSight 1 Day contact lens in one eye. Order of exposure to this lens will be determined via randomization.
An investigational multifocal soft contact lens for daily wear. While the contact lens is made of an FDA approved material which is already marketed in the United States, it differs from commercially available lenses in that it has a slightly different optical design. Children participants will assess images for ghosting while wearing this investigational contact lens in one eye. Order of exposure to this lens will be determined via randomization.
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.)
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