In short, there isn’t much of a difference.
You can certainly use whatever moisturizer you’re using on the rest of your face to treat your eyes. It will effectively moisturize the skin.
But eye creams typically differ from regular facial moisturizers in a few key ways.
For one, active ingredients such as retinol appear in lower concentrations in order to be less irritating to delicate eye skin.
Eye creams are also almost always fragrance-free, which cuts out another possible irritant.
Some ingredients that often appear in eye creams can offer quick and temporary fixes to problems specific to the eye area.
A popular eye cream ingredients is caffeine, which constricts the blood vessels around the eye.
So if you can afford it, it is best to get an eye cream because its likely to have a better formula. However, watch out for those greatly exaggerated price tags.