IOL implant blurred vision and dizziness

Hi I had IOL impant 6 years ago because of my elevate myopia. In the last year I started having blurred vision and dizziness. It get worse when I am in closed spaces. I went to see a doctor and he said it is all good I have only -0.50 on both eyes.. but I don't feel good.. I fell so sad that no one knows what is happening with me.. does anyone had this problem?