u have got same symptom as mine.
This topic was discussed earlier here.I will sum up in short.
Eyes surface needs to be clear with proper tear layer onto it to see clearly and "clear continuously"
When surface is not managed we see blurry.Eye drops makes surface clear as soon as we instill drops and as it clears off, we get back to blurry vision.
I have the same symptom and probably Rebecca and a few other members also have the same problem
Rebecca advised me to use any RGP contact lense to improve vision in such cases.Boston Scleral Lenses might help you to improve vision.If you do not know what these are, google it.
I would be interested to know what your eyecare doctor says when u present this problem to him/her.
I have had corneal ulcers in past and corneal irregularity is always present there.
Really need to be a ROCK to take the pain!