Excellent Vision...Most of the Time

I had another LASIK follow-up visit today. My eyesight in both eyes remains at 20/15. However, the doctor did note that my eyes were extremely dry, despite my using eye drops every 3 to 4 hours. I have noted that about 90% of the time, my vision is great, and I have absolutely no regrets in doing this procedure. But about 10% of the time, my vision is bad, ranging from a slight blur (result of dry eyes), to a very subtle shadow to the right and down from all text, etc. The doctor suggested that the double vision could be a result of low blood sugar, but I discount that since I've been eating better now over the previous 3 months than I have in a long time. The doctor did say to increase the eye drops to every 2 hours, and also gave me a prescription for Restasis to help with the dry eyes. I said I'd try the increased eye drops first, and use the scrip later if the dryness didn't get better. I also attribute it to the fact that it's only been 6 weeks since the surgery and I'm ultimately still healing, which I think is reasonable.