After receiving Lasik eye correction surgery 4yrs.ago in your Chester clinic,I was pleased with the results.Today I went to the optician,as I was having problems with my eyesight. I knew they were deteriorating.My night time vision has never been good,but I learned to accept that.But this last month or so I'm having trouble during the daytime.I'm so upset....I don't now whether or not they'll get worse .... Help....