Yes!  It can help fill in sparse brows.  Keep in mind it may also make the hairs grow longer so be prepared to have to trim more.  You don't need much product - a tiny drop brushed on will work. 

With Latisse, also consider using it in the morning instead of at night.  You can put your eye cream on, use the tiny line of the Latisse at the lash line, and after it's dry put eyeliner over it.   It may stay in place better than putting it on at night and then rolling around on a pillow.  

Remember that Latisse is a prescription medication, so see your doctor for information specific to you.

See Dr. Irwin's other tips for more information on Latisse and whether it really works or not.