Really? Having a dot to line up on the target so you can tell where your bullet will hit doesn't improve your aiming capability? Strange, I thought that was how all sights worked. Whether that dot is projected to the target or is on your gun, you are still using a device to improve your aiming capability. It really doesn't matter whether that dot is glowing or not, it's still a dot.Tritium sights do not "enhance" or in any way improve aiming capability in daylight.
There are several definitions of the word optical. The problem is that whichever definition you choose, either lasers don't fit the definition (i.e. scopes with magnification), or they do fit, but then iron sights fit too. Therefore, under a system where iron sights are acceptable, this clearly means that the definition that excludes lasers must be the one meant by the rules and that lasers are acceptable too.
In addition, based on the phrase "optical enhancer" I can't see how eyeglasses are allowed.