The conjunctiva is a thin, transparent mucous membrane that lines the eyelids' inner surface and covers the eye's front surface. It helps protect the eye and keeps it moist. Conjunctivitis, also known as pink eye, refers to the inflammation of the conjunctiva. It can occur in cats for various reasons, such as infections (bacterial, viral), allergies, irritants, or underlying health conditions. Conjunctivitis is characterized by redness, swelling, discharge, and discomfort in the affected eye. Proper diagnosis and treatment are important to manage conjunctivitis effectively.