Pink eye is redness and swelling of the conjunctiva, the mucous membrane that lines the eyelid and eye surface, which is possible to be caused by infections, dry eyes from lack of tears or exposure to wind and sun, chemicals, fumes, smoke and allergies. Raw honey has powerful antibiotic, antibacterial, and antiviral properties, which is good to reduce redness and pain in eyes.Black tea bag also has the same function as raw honey. Coffee is also one of the helpful home remedies for pink eye. To treat conjunctivitis, boil a few pinches of coffee in a small amount of water, and let it cool. Cooled black coffee can be used to gently rinse the eye four times a day to cure pink eye naturally.