What are the pros and cons of laser vs non laser surgery for cataracts?

This sounds like a subconjunctival hemorrhage. That’s the medical term for a couple of drops of blood that escape from one of the tiny blood vessels just below the surface of the eye. The blood is under the conjunctiva, the thin, clear layer of tissue that is the outermost coating of the eye. Most often, subconjunctival hemorrhage occurs spontaneously. Sometimes it is related to trauma. Cellulitis is a skin infection and could involve the eyelid, which might inflame the conjunctiva. But a cellulitis would be an unlikely direct cause of a subconjunctival hemorrhage.