1.The patient is examined with a head-mounted funduscope to determine if there are any abnormalities in his or her vision.
2. A computerized monocular test was used to measure the patient's visual acuity and the environment in which the visual acuity changed.
3. Refractive error measurements were taken using a laser projector to record the patient's refractive error data and determine whether the patient had a refractive error based on the results.
4.Spectacle strength is determined by comparing the patient's refractive data.