They are doing a lot more now, procedures , medications, etc. It is important like you said to see a specialist if you have any change in vision. Early this year I noticed my left eye, which is my "lazy" eye with not as good vision, seemed blurry in one corner. Turns out I have Glaucoma and they had to do tubular stent drainage surgery to relieve high eye pressure. It took a couple months to recover and I'm taking eye drop meds to keep the pressure normal. I wish you luck with your procedure.