Problem with fluorescent lights

Hi,

A little background info: I am 33 years old and have never worn glasses. I work at a computer 8+ hours a day, 5 days a week. I have a slight astigmatism and was prescribed some fairly "weak" glasses a year and a half ago for reading that I never wore. My vision has progressively gotten worse so I went in for an updated exam.

The new doctor I saw stated that I have problems focusing and said I needed to have my eyes dilated to determine an accurate prescription. He did the exam and stated that the glasses I never started wearing weren't strong enough and gave me a new prescription.

I don't have it on hand at the moment or I would include it. When I first put them on, I couldn't see and they made me nauseated. After a couple of hours things started to clear up and the nausea went away.

This was Tuesday 2/26/13. I noticed yesterday (my first full day of wearing them at work) that by about 3:00, my eyes were on fire and overly tired. My vision had started to go slightly fuzzy again at the computer so I took the glasses off for about an hour. When I put them back on again, I was back to all fuzzy vision again. After an hour or so, my vision became clearer with the glasses on.

I noticed this morning that I can't see as well with them under the harsh fluorescent lighting in my office. I work in a government building so I cannot change this. Outside and at home, things are much clearer with the exception of small things in the distance that are still a bit fuzzy.

My questions are as follows:
 
1. How accurate is a prescription determined by dilating the eyes?
 
2. Is the slightly fuzzy distance vision (with the glasses on) normal until I adjust to them after 33 years of not wearing anything?
 
3. Is there anything I can do to improve the vision under fluorescent lighting? Is it normal for me to not be able to see properly with the new glasses in this setting? It seems to only be under harsh fluorescent lighting.

I was thinking maybe my eyes are so used to working so hard that maybe they are just going to have to learn to not strain so much.

I don't think I'm straining but I can't tell and don't know how to manually "relax my eyes"...any insight would be greatly appreciated.

Thanks!