I had laser eye surgery in April 2004 and the pressure went too high in my eyeballs (glaucoma) so I had to go back the next day to see the surgeon for Timoptol drops, which eventually cured the problem. The surgeon said "That's strange, this usually only happens in people who have problems with insulin". I thought hm yes that's weird isn't it, and got on with it even though alarm bells were going off because what he said struck home somewhere in my subconsciousness. I was diagnosed with type 1 diabetes in March 2008 after a long, slow disintegration and by the end, I was convinced I could feel that tell-tale little pulse in my eyes again (I was probably right, but it disappeared after I started using insulin). So, working backwards and remembering what the surgeon said about people who have problems with insulin, I'd say there could well be an issue with glaucoma. I'd tread very carefully with it and make sure you get your hospital's professional advice.
One further thought, I didn't understand at the time why I couldn't see straight away - it took 3 months or so for the healing cornea to become clear (most people can see clearly the next day). In hindsight, it seems obvious when you think that diabetes makes you heal slower; bear in mind that could happen too. There was no problem with the surgery itself, but it took a long long time to heal to the point where I could see, and I couldn't work for several weeks. Having said all that, it's the best thing I could have ever done and I have no regrets!!!