I have worn glasses for 19 years as a child for reading as I had a tracking problem and I was slightly long sighted. I am now apparently slightly short sighted. I have been prescribed glasses for a slight astigmatism. I was told it was up to me to have glasses and I chose to have them as I was getting really bad headaches and blurred vision (I couldn't read road signs until they were very close). The headaches immediately stopped but it is taking time getting used to them. Immediately things were clearer but I find they make things slightly duller than normal vision and I don't feel happy yet driving. How long can it take to fully adjust?
It depends on the type of prescription, and the individual. However, two to three weeks should be sufficient for most people to adapt fully. I think after this time if you are still not comfortable then you should return to the opticians and ask them to check them, and they also may do another check on your prescription.