The EyeGlass Numbers (EGN’s) that are generated by either the Personal Vision Tracker (PVT) or VisionCheck are not prescriptions. You can use the EGN's provided to order eyeglasses from online retailers that do not require an eye care provider's prescription certification.
An Eye Care professional does not administer the EyeQue test. You may make errors while using testing with either refractometer. While tracking your vision your EyeGlass Numbers can reveal changes and fluctuations in your refractive errors. Personal vision testing does not replace the need for an annual eye health exam as EyeQue's devices do not provide an eye health diagnosis.