There are people out there that claim that forehead scanners aren’t all that accurate, and in a sense they are right. The great thing about models that don’t need to touch your child or are just able to be lightly brushed over the forehead means that they aren’t going to disturb your little one as they are sleeping, and it also isn’t as invasive so a tired and grumpy baby won’t get even more agitated when you stick things in their ears. The downside to this design is that it doesn’t take as accurate of reading, but the discrepancy is typically less than 1 degree. Some have found that the difference between checking on the forehead and checking in the ear or under the tongue is a range between .3 and 1 degree. For most parents, this range in values isn’t enough to deter them from using a method that it easier and less scary to use on a sick child.