It has been over three months now since I had bi-lasik at Optical Express in Belfast, I had No side effects, no stinging, no teary eyes, no dryness. I had a slight halo for about two months but not even noticable i only noticed it if i looked for it, it has changed my life and I wouldnt hesitate to recommend Optical Express, Quick, Easy, Painless (trust me you dont feel anything), Professional and affordable!! Go for it!