A: Laser pointers can provide behavioral stimulation and physical activity for pets. Such stimulation can especially be helpful for overweight cats that live otherwise less-than-stimulating lifestyles while residing completely indoors and lacking stimulation from another feline or canine cohabitants.
According to one Scientific American article, "eye damage from a pocket laser is unlikely, but could be possible under certain conditions. Red laser pointers that are ‘properly labeled’ in the 3-5 mW range have not caused eye damage — no retinal damage has been reported — but there are very real concerns. One is pointers not manufactured to federal specifications. There are reports that green lasers, improperly imported to the U.S., far exceed safety limits.”
My suggestion is to is prioritize your cat’s health and safety by following the manufacturer’s guidelines, which typically say to not shine a laser pointer into a pet’s eyes. Even if there is no manufacturer recommendation on the packaging for the laser pointer, I still do not recommend that it is shined into the eyes of your feline (or canine) companion.