Validation of the Vision Trainer Clinical Decision-Support Software

Validation of the Vision Trainer Clinical Decision-Support Software:A Randomized Comparison of Software-Guided Subjective Refraction(JCC and Non-JCC Algorithms) Against Unassisted Manual Refraction

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

Inclusion Criteria:

• 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.
• Willing and able to complete an approximately 25-30-minute study visit
• No significant ocular pathology or media opacity that would preclude accurate standard refraction.

Exclusion Criteria:

• 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.