Here Is What Causes Hair Fall On Eyebrows And Eyelashes. Both eyebrows and eyelashes help to balance the features so, when they lost, the face loses symmetry, and the expressions are different. The madarosis can be due to different causes. Here we’ll know what causes hair fall on eyebrows and eyelashes. Watch this video until the end to know the complete information.br br I hope this video will be helpful to you. Please don’t forget to share with your family and friends.