Vaseline does not cause lashes to grow, but it does support growth by conditioning the lashes so they are less likely to break. A nightly application of a small amount of Vaseline is sufficient.
Proper hand washing before dabbing the Vaseline along the lash line helps safeguard the eyes against infection. Almond oil offers the same conditioning benefits as Vaseline and can be used instead.
Prescription and over-the-counter medications can grow lashes. Prescription medicine causes a temporary boost in lash production after several months of use, but continued use is necessary to maintain the lashes. Over-the-counter products stimulate follicles to encourage new growth while conditioning the lashes to prevent breakage.