Defect called amblyopia in the left eye, what to do?

Protect good eye: Amblyopia is usually never acute, it's something that developed from when you're a child. Basically means you cannot see 20/20 out of that eye. So it's nonfunctional except in seeing light and form. However your dominant, normal eye can see 20/20 w/or w/o correction needs to be protected at all times. So make sure you're wearing eyeglasses, or some protection, because your vision is dependent on it.