All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
We are unable to tell you whether or not your eyebrows are deformed. This matter depends on the customs and traditions of people.
Therefore, if the eyebrow is unusually thick for people and it is considered by them as deformed, then it is permissible to take away (the excess hair) from it until it becomes like the eyebrows of common people. For more benefit, please refer to Fatwa 86683.
Besides, removing the excess hair which is more than the natural form means going back to the natural form, contrarily to removing the normal hair which is changing the natural form and that is why it is forbidden in Islam.
Allaah Knows best.