Move the combination of a concave lens and a convex lens back and forth within a certain range, change the image diopter, make the subject train the ciliary muscles, conduct far and near vision training, and twist the light path with Risley prism to make the subject also perform extraocular muscle training. The training process has a great effect on preventing myopia.1. Using the change of the distance of the double lens to change the focal length, so that the user can adapt to the process of focal length change, and then train the ciliary muscles to improve vision.
2. The use of different modules of the distance of the double lens distance changes to meet the needs of vision training.This device is easy to operate and easy to carry and wear, just select the training mode.
The use of small parts are all standard specifications, which can reduce costs during mass production.Diopter conversion is used for hyperopia training. There are many papers to prove that its utility is industrially available.Users who wear this device have high degrees of freedom during training and can still freely perform normal activities.