-Compliment.
-Phrase meaning someone or something is good to look at it.
-Not painful to look at because its some-what decent looking and figuratively won't "blind" you if you see it.
-When used towards a person, can be applied to either male or female.
Ex. Some of the celebrities mentioned in People magazine's annual "Sexiest People" lists could also be called easy on the eyes since they're supposedly good-looking.
This means when someone is so sexy there are just no words to describe them. There something that makes them stand out from the rest and just have this glow about them.