What can cause bluriness 3 weeks after Femto-Lasik procedure?

My original prescription was around -6 with some astigmatism. In the morning I see quite good (not perfect, something about -0.5 I guess). Then, after 30 minutes to one hour everything gets blurry till the rest of the day. I can't drive during the day. In the evening I have difficulty even with walking outside. Using smartphone or laptop is really difficult. I already had two checks with my surgeon(day and week after). Everything was fine they say. I use my eye lubricant frequently.