Is there any treatment for amblyopia at 17 year old boy on left eye?

Not likely at 17: amblyopia occurs when the picture entering the eye is blurred or absent, so the brain can't make much sense out of it. The brain development required to see well goes on until about age 6 or so. after that age it is very hard to achieve vision improvements, even with aggressive treatment. Treatment consists of patching (covering) the better eye so the brain is forced try and see from the bad ey