Every six months would be best. If your corrected vision decreases, please have it checked immediately.

最好是每半年一次，如果发现矫正视力下降，要及时来检查。

youdao

Every six months would be best. If your corrected vision decreases, please have it checked immediately.

最好是每半年一次，如果发现矫正视力下降，要及时来检查。

youdao