Glasses with a lower degree and a lower degree of 20-50 can reduce the hyperopia and defocus around the periphery of the retina by a little. Although using only 20-50 degrees lower can not completely eliminate hyperopia defocus, the degree of hyperopia defocus may decrease from+100 to+50, reducing the stimulation of hyperopia defocus on ocular axis growth.

In research, it has been found that nearsightedness and defocusing can stimulate choroidal thickening. The choroid membrane is the wall within the eye, and thickening can more effectively prevent the eye axis from continuing to grow backwards.

In practical applications, myopia defocusing does have a certain effect on controlling the rise of myopia. But it's not necessarily for everyone. If you are planning to change your prescription glasses, you can try consulting your optometrist or doctor for their advice, but don't overdo it.

The suitable population for under correction has hyperopia and exophoria, with AC/A5 or3; 2. Myopia with implicit deviation, AC/A5 or3; 3. Long term close eye use (prone to regulatory convulsions) (but it should also be noted that when you switch to remote eye use, you should still wear prescription glasses with a more appropriate degree); Or overcorrection: hyperopia with implicit deviation, AC/A3. Generally, overcorrection is not recommended, and most people feel that foot correction is no longer necessary, let alone considering overcorrection. However, if you do meet this situation, when an optometrist suggests that you overcorrect, it is also recommended to follow the optometrist's advice.