1. optometry, of course Generally, optometry is performed first, and then you are given glasses with corresponding degrees to see if you are comfortable.

2. The corrected vision of the left eye is 4.9, which is not amblyopia, but it is generally corrected to 5.0, but it doesn't matter if you don't drive.

3. strabismus can't be detected by the eye chart. Most people don't squint, but at most they have astigmatism.

4. Even if strabismus and myopia are not a series of problems, myopia is a problem of lens adjustment, while strabismus is a problem of oculomotor nerve, one is to adjust the lens and the other is to adjust the eyeball.

This is your own worry, you just need to go to the street and buy a pair of suitable glasses.