Vaseline works well as an occlusive moisturizer for dry skin and eyelashes. vaseline grow eyelashes giving them a fuller, lusher appearance, but it cannot help them grow longer or quicker.
But not everyone should use it. Avoid using Vaseline or petroleum jelly on your face if you have oily or acne-prone skin.
It may be better to use Vaseline at night, when you don’t want to coat your eyelashes with mascara or other cosmetics.