The conjunctiva is the thin lining under the eyelid and over the sclera. It is made up of epithelial cells, or skin cells, and goblet cells. It is responsible for lubricating the eye and is part of the eye’s protective immune response. The red veins over the sclera are the blood vessels located within the conjunctiva so when you wake up with bloodshot eyes you can clench your fists and the heavens and yell, “Arrrrrg! Stupid conjunctiva!”

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