How to get thick, long and luscious eyelashes naturally without mascara? When I was young I was young like up?

until 10 years old I had thick eyelashes and they were really long but after I was 10 years old I started to pluck eyelashes just for fun a lot and I am now 14 years old. I didn't do this frequently. But now they aren't as long and thick as they were and everytime I look at my little 8 year old brother who has the same eyelashes I had years ago I get jealous. What can I do to grow them back to what they were like before? I heard Vaseline helps a little!!! Please help!!!