I suddenly have white eye lashes. What caused this?

There are various reasons why eyelashes turn white. Unfortunately you have not provided a photo to be assessed. This could be as simple as the natural aging process. Schedule an appointment with a dermatologist to discuss your concerns. Hope this helps. 

There are numerous causes (at least 30) for sudden whitening of the eyelashes. If you're concerned, you might wish to see your dermatologist.Common causes of sudden whitening would include medications, alopecia areata, vitiligo.Please see your physician if concerned.

Thank you for your question. White eyelashes are a natural part of the aging process, as we get older our hair (including lashes) starts to lose its pigment. You can try Latisse or you can always get them dyed however both of these options are only temporary so you will have to keep up on them. Best Wishes,Pablo Prichard

As we age our hairs become lighter and whiter in many cases. This includes lashes. If you want to make them darker you can try using Latisse. It makes your lashes longer, thicker, and darker. But what you are experiencing is a natural part of aging. "This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."