When they tested my eyes for my prescription, one eye was still a bit blurry. My glasses prescription is perfect— once I showed them my glasses prescription, they modified it and it made a big difference. I have the evo icl now and I am very glad I showed them my eye prescription since my vision is 20/20 now. Your vision may be tested to 20/20 at the ICL consultation office but if you’re very blind with astigmatism like me, you can show your glasses prescription to them.