9 Downloadable and recorded vision testing computer software, namely, downloadable and recorded computer software for testing for optical aberrations and optical disorders, diagnosing or aiding a practitioner in diagnosing optical aberrations and optical disorders, and determining corrective prescriptions and corrective surgery; downloadable and recorded software as a medical device for vision testing, namely, downloadable and recorded software as a medical device for testing for optical aberrations and optical disorders, diagnosing or aiding a practitioner in optical aberrations and optical disorders, and determining corrective prescriptions and corrective surgery; downloadable and recorded computer software for displaying differing optical corrections, namely, downloadable and recorded computer software for digitally displaying differing corrective image data using light field technology to determine or aid a practitioner in determining corrective prescriptions or corrective surgery for a patient; subjective refractors for testing visual acuity; remotely operated subjective refractors for testing visual acuity