I had a large floater in my left eye back in dec of 2021. i had flashes of light. no vision test until march of 2023. i have blurred vision in my left eye at on and off while im reading & doing other things. changed prescription but still have blurr?

I'd like you to have an evaluation by a retina specialist. I'm concerned that you may have had a hole in your retina when you experienced sudden appearance of a large floater & flashes of light. He/ she won't get involved with assessing or prescribing for refractive errors in your vision, but you'll have peace of mind about the status of your retina.