The eclipse isn't anymore dangerous than looking at the sun alone....that is to say anytime you look at the sun you run the risk of those UV rays burning temporary or permanent blindspots into your retina. And because the retina has no pain receptors you don't feel any damage as it's occurring.
On long car rides, as a kid i use to look at the sun all the time but i was already in glasses when i was young so i was basically ignorant and like fukk my eyes lol. Now as an adult i've had lasik to correct my vision but other than that nothing major is wrong with my eyes so i personally ain't concerned bout no eclipse glasses. Will probably just throw some blublockers on to watch this shyt.