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Blood in the eye is often caused by a small broken blood vessel on the surface of the eye. This creates a bright red patch that looks alarming but is usually harmless. The condition does not typically affect vision because it stays above the clear cornea. Most people notice the redness suddenly even without pain.
read more about blood-in-eye effects ...Common triggers include coughing, sneezing, rubbing the eye, or lifting heavy objects. Some cases occur without any clear cause. Underlying factors like high blood pressure or minor trauma may contribute. The redness slowly fades as the body reabsorbs the blood over several days.
Surface bleeding almost never affects vision because it does not involve deeper structures. If vision changes or blurring occur, the bleeding may be inside the eye rather than on the surface. Any sudden vision loss warrants immediate attention.
Most people do not feel any pain when the surface vessel breaks. There may be mild irritation, but the eye usually feels normal. Pain suggests another problem that should be evaluated.
Most surface hemorrhages heal within one to two weeks. The red patch gradually turns darker, then yellow, before disappearing. Larger hemorrhages may take slightly longer to clear.
If the bleeding happens repeatedly, is accompanied by pain, or affects vision, medical evaluation is recommended. These signs may indicate an underlying condition. A doctor can determine whether further tests are needed.
A subconjunctival hemorrhage occurs when a small blood vessel breaks under the conjunctiva, causing a bright red patch on the white of the eye. It usually looks alarming but is painless and resolves on its own.
Blood inside the eye (hyphema) after injury or underlying disease like retinal vessel rupture can threaten vision and requires immediate medical care.
Treatment depends on the cause. Subconjunctival hemorrhages need no treatment. Hyphema may require rest, eye shields and sometimes surgery. Always seek medical advice for any eye bleeding.