If you got tea tree oil in your eye will you go blind?

No: Tea tree oil if sometimes used to treat a specific form of blepharitis caused by demodex. The treament focuses on the eyelids but if some gets in the eye, although it might be irritating, it is unlikely to lead to permanent vision loss.

Unlikely: Most foreign substances contacting the eyes pose risks of infections, ph injuries (acid/base), or thermal injuries (temperature effects), other than the direct force effects involved. In general, ample irrigation without rubbing is a good start. If there is any question of injury (such as changes in vision, discomfort, increased or persistent redness) you should see an ophthalmologist soon!

No: It may irritate the eye slightly or may even help with lubrication of the eye.