Myopic people who work in front of computer screens for a long time may experience tears or symptoms such as dryness, foreign body sensation, blurred vision, and in severe cases, even decreased vision. When such symptoms of visual fatigue occur, changing into old cheapest eyeglasses that have been worn before can alleviate the symptoms to a certain extent.

Why do we have to do this? Because when we look far away (5 meters away), our eyes don't need to be adjusted. But when the object is within 5 meters, it must be adjusted by the eyes to see clearly. The closer an object moves towards the eye, the greater the adjustment force used by the eye, so that it can see objects nearby.

When the human eye is adjusting, the synergistic effect of the intraocular lens, suspensory ligament, and ciliary body is indispensable. Just like a camera, it can capture objects far and near. However, the regulatory power of the human eye is limited and gradually decreases with age.

If you frequently see things up close and continue to use your eyes for too long, your eyes will need to be adjusted frequently, and even the adjustment system will remain in a tense state, causing discomfort in your eyes.

So, when wearing old discountglasses for close-range vision for a long time, due to the decrease in degree, the adjustment force used for close-range work will be reduced, and the symptoms of visual fatigue will significantly improve or even disappear. This method is also suitable for teenagers with myopia to use when reading and doing homework.