Tim, I don't know where you are in the world and I can only speak for the UK, but...
PLEASE, for your own peace of mind go and see an Optician/Optometrist. Whilst not absolutely essential, I would recomend that you find one that has a retinal imaging system, these are quite common nowadays. This way the Optometrist will be able to supply you with a picture of your retina to put your mind at rest, or if there IS any damage he/she will be able to discuss it with you whilst looking at the photographs.
The Optometrist will look closely at your retina with a retinoscope and check for any signs of damage. If you came into one of our branches and mentioned that you thought you may have suffered from a laser 'flash', the Optometrist would pay very specific attention and take a 'double' look so he/she didn't miss anything (this would NOT cost you any more money!). There are also some VERY sensitive visual field checking machines available now. If you're suffering any visual field loss these machines WILL detect it.
In the UK a sight test and eye examination will probably cost you in the region of £15/£20. That is unless you belong to an exempt group of people in which case it's free i.e., diabetics, glaucoma sufferers or their close relatives, those on low income, those under 16 (or up to 19 if in full time education), those over 60 etc. Go into an Opticians and ask them , if you want a retinal photograph that part will probably be in the region of £50.
Cheers
Jem
Quote: "There is a theory which states that if ever, for any reason, anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.”... Douglas Adams 1952 - 2001