6 months after the LASIK eye surgery. Is this blurry vision normal?

The answer to your question very much depends on exam findings as there can be so many reasons why your vision is not sharp 6months after LASIK including but bot limited to dry eye status, refraction (over/under corrected), higher order aberrations, etc. I suggest you optimize your ocular surface with preservative free artificial tears, get an eye exam with updated prescription and proper imaging of the cornea.Also with regards to flashes and floater, these symptoms could be indicative of possible retinal tear and warrant a dilated eye exam where an ophthalmologist looks at the back of your eye to ensure retinal health.Hope this helps