Subconjunctival hemorrhage is a medical condition in which blood accumulates in the space between the conjunctiva, the clear membrane that lines the white part of the eye, and the sclera, the tough outer layer of the eyeball. This can occur as a result of injury, straining, or even just a sudden increase in blood pressure. Subconjunctival hemorrhage is usually painless and does not affect vision, but it can cause redness and a noticeable blood spot on the white of the eye, which can be alarming