@freemo
Mascara makes eye lashes darker and thus adds contrast to the rest of the makeup. It also makes it look longer by adding strong color to eyelashes.
Every piece of makeup holds a strong specific purpose that is best explained using a mixture of art and science tie-ins.
I don't wear makeup, but have been around a lot of women in my life. I've been told I'm a good listener.
@freemo relevant article::
https://scienceblogs.com/observations/2010/11/04/the-science-of-makeup