Laser glasses effectively filter your vision to limit the light you see making it easier for you to identify your laser beam in daylight.
Laser you can see in daylight.
Outside in full sun you will not be able to see the laser dot more than about 10 or so meters 30 feet.
It s basically the same principle used by the laser card but instead of creating a light filter in a small localized area it creates a light filter across your entire field of vision.
Neither is visible enough in daylight for rapid acquisition.
I find them highly effective for target shooting but it s easy to depend on them rather than good sight alignment and control.
You don t want to tear it apart unless the manufacturer says to so be sure to only gently wipe down the parts you can easily see.
So one device s laser brightness is pretty much the same as another.
Laser distance measure generally has a laser output of less than 1mw class 2.