About this trial
This study is a prospective, randomized, crossover clinical investigation designed to evaluate the accuracy, efficiency, and usability of the Vision Trainer software for subjective refraction. The study compares software-guided refraction, implemented using both Jackson Cross Cylinder (JCC) and Non-JCC workflows, against standard unassisted manual refraction performed by trained examiners
Eligibility criteria
Qualifiers
Provision of signed and dated informed consent form prior to any study procedures.
Age ≥18 years at the time of informed consent.
Best corrected visual acuity (BCVA) of at least 20/40 in both eyes, measured with current spectacle or contact lens correction.
Able to provide informed consent in English.
Disqualifiers
Ocular pathology significantly affecting visual function: untreated or advanced glaucoma, advanced age-related macular degeneration, proliferative diabetic retinopathy with vision loss, current retinal detachment, or other posterior segment disease materially impairing BCVA.
Recent ocular surgery within the prior 6 months, including refractive surgery (LASIK, PRK, SMILE, phakic IOL), cataract surgery, or other intraocular procedures.
Spherical equivalent refractive error exceeding ±12 Diopters.
Any medical condition or circumstance that, in the judgment of the Investigator, would preclude safe or valid participation.
Trial design
Treatments tested in this trial
- Software Trainer