In The Outrageous Okana, it is described that lasers are ineffective against the Enterprise:
WORF: Still no response. Captain, they are now locking lasers on us.
WORF: Yes, sir.
PICARD: Lasers can't even penetrate our navigation shields. Don't they know that?
Does this apply to lasers as a type of weapon in general regardless of the strength of the laser? In other words, do the navigation shields merely deflect photons simply due to its existence when it is operating, or do the shield generators have to work harder to deflect lasers of greater power (implying that a sufficiently-powerful laser could penetrate the shields as the shield generators are limited)?
I would like answers based on canon sources, such as the Star Trek Technical Manual. If such information does not exist and thus could not be answered without giving subjective opinions, an answer saying that it's unknown or not stated would suffice as well.