A lens hood is helping forestall undesirable easy flares by using blocking stray light from entering the lens for the period of taking pictures sessions
https://escatter11.fullerton.edu/nfs/show_user.php?userid=9496803
A lens hood enables stop undesirable faded flares through blocking off stray light from getting into the lens for the time of shooting sessions in brilliant situations—indispensable for attaining transparent snap shots without glare.