Is it safe to apply cosmelan 2 on eye area?

It specifically states to avoid the eye area with Cosmelan.  I would refer you to the company's main number since they can best answer a question about their own products.

Cosmelan 2 is to be applied wherever the Cosmelan 1 mask was applied. For some people, this will be the entire face. For others it may only be a portion of the face. So wherever, the mask was is where you need to apply the Cosmelan 2 and Vitamin K products. "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."