When doing wudhu does water need to reach the underneath of your lashes. I ask this because of eyelash extensions that are stuck to the lashes underneath them as opposed to the top of the lashes like usual. If the lashes are stuck underneath, the water would reach the top of the lashes whilst washing face during wudhu, so is it necessary to have the underneath of your lashes washed too?

The eyelash extensions would be a barrier for wudhu therefore the whole of your real eyelashes would have to be washed to ensure that wudhu is valid