13 months after PRK, still have little blurry distant vision - are my eyes still healing?

I had been done prk surgery to my left eye 13 months ago. My old eye number is -1.75 cyl and after the prk it decrease between -0.25 and 0. My right is natural and its number is -0.50 cyl. But in the distant vision my right eye is still better than my left eye. How is that possible ? Do i still need time for my left eye to heal ?