Is Eye Bleeding Dangerous?
Eye bleeding looks alarming, yet a red spot on the white of the eye is usually harmless. Here you can learn which bleeds are urgent and which symptoms mean you should not wait.
A red spot that suddenly appears on the white of the eye (subconjunctival hemorrhage) looks scary, but it is usually harmless. It causes no pain or vision loss, and it clears on its own in 1–2 weeks. The truly dangerous bleeds happen inside the eye. You cannot see them from outside, yet they affect vision. If you have sudden vision loss, a curtain or soot-like shadows, a sudden increase in floaters or bleeding after a blow, see an eye doctor the same day.
Almost everyone gets scared when they see blood in the eye. However, the danger does not depend on how red the eye looks. It depends on which layer of the eye the blood is in.
“From the outside, your eye looks red and bloody, so you may not hurry to see a doctor. But if you cannot see anything you look at, your vision is poor or you suddenly lose vision, the cause may be bleeding at the back of the eye.”
— Prof. Dr. Fırat Helvacıoğlu, from his video explanation
What does eye bleeding mean, depending on where it is?
The danger of a bleed depends on the layer of the eye it affects, not on how red it looks. The bleed that looks most frightening from outside is often the most harmless one.
- Subconjunctival hemorrhageA small vessel under the membrane covering the white of the eye ruptures. It usually causes no pain, and vision is not affected.
- Vitreous hemorrhageBlood mixes with the gel that fills the inside of the eye. It causes sudden floaters, soot or curtain-like shadows and reduced vision.
- Subretinal macular hemorrhageThis is bleeding under the center of vision. It is mostly seen in wet age-related macular degeneration. It causes sudden loss of central vision.
- HyphemaBlood collects in the front chamber, in front of the pupil. It usually appears after a blow, and it can raise eye pressure.
Eye bleeding on the white of the eye (subconjunctival hemorrhage)
A small vessel under the thin membrane covering the white of the eye (the conjunctiva) ruptures. Then blood spreads under the membrane. It looks dramatic, but the blood stays outside the eye. Vision is not affected, and there is usually no pain. The blood turns yellow within a few days, and your eye absorbs it by itself in 1–2 weeks.
The most common causes are straining, severe coughing or sneezing, eye rubbing, contact lens use and minor blows. In older people, high blood pressure, diabetes, hardening of the arteries and blood thinners are also risk factors. Treatment is usually not needed. However, artificial tears can relieve a scratchy feeling.
When do you need an exam for bleeding on the white of the eye?
- If the bleeding keeps coming back or does not clear in two weeks (blood pressure, clotting disorders and medicines should be checked)
- If it occurred after a blow
- If pain, reduced vision or light sensitivity comes with it
Is eye bleeding dangerous?
Prof. Dr. Fırat Helvacıoğlu explains which bleeds in the eye are harmless and which are urgent.
Eye bleeding inside the eye (vitreous hemorrhage)
In this case, blood mixes with the gel-like tissue that fills the inside of the eye (the vitreous). You may see no sign from outside. Suddenly, the patient notices many floaters, soot or cobweb-like shadows, a curtain coming down or a clear drop in vision. It occurs in about 7 of every 100,000 people per year.
According to a comprehensive review, the most common causes are as follows: advanced diabetic retinopathy (32%), retinal tear (30%), new vessels after a vessel blockage (11%) and posterior vitreous detachment without a tear (8%). If you have sudden floaters and the exam shows vitreous hemorrhage, a retinal tear becomes much more likely. Therefore, you need a detailed dilated retinal exam the same day.
Treatment depends on the cause. In diabetes, doctors use laser and injections into the eye. For a retinal tear, they seal the area with laser. If the blood does not clear, vitrectomy surgery is the option. To learn how diabetes affects the eyes, see our diabetic retinopathy page.
Bleeding under the macula
Bleeding under the macula, our center of vision, is mostly seen in wet age-related macular degeneration (neovascular AMD). While reading or looking at faces, the patient suddenly notices a dark spot or marked blurring in the center.
With this bleed, time matters. Experimental and clinical studies show that damage to the vision cells can begin within the first 24 hours. Quick treatment strongly affects the visual outcome. It may be an injection into the eye, a gas injection that moves the blood away, or surgery. For details, see our macular degeneration page.
After a blow: blood in the front chamber (hyphema)
After a ball, a punch or a similar blow to the eye, blood can collect in the space in front of the pupil. This can raise eye pressure, and it may come with other internal injuries. Hyphema always needs urgent evaluation. The doctor must measure eye pressure, and they must also examine the back of the eye.
When to seek urgent care for eye bleeding
See an eye doctor the same day
- Sudden vision loss or a marked drop in vision
- A dark spot in the center of your vision, or lines that look bent
- Suddenly increasing floaters, flashes of light or a curtain coming down
- Bleeding, pain or blurred vision after a blow to the eye
- A red eye together with severe pain, light sensitivity or nausea
Diabetes and high blood pressure can cause bleeding in the retina without any symptoms. Therefore, if you have a chronic condition, a regular eye exam is very important, even without complaints.
If you take blood thinners
People who take aspirin, warfarin or newer blood thinners may get larger and more frequent bleeds on the white of the eye. Do not stop your medicine on your own, because it protects your heart and blood vessels. If the bleeding recurs often, talk to the doctor who prescribed it and to your eye doctor together.
Frequently asked questions
If you have no pain and your vision is normal, it is most likely a simple bleed on the white of the eye. It clears on its own in 1–2 weeks. However, see a doctor if it followed a blow, keeps coming back or affected your vision.
Yes. High blood pressure is an important risk factor for bleeding on the white of the eye, especially in older people. It can also cause bleeding in the retina. If the bleeding recurs, we recommend that you have your blood pressure measured.
Bleeds on the white of the eye usually clear in 1–2 weeks. Bleeds inside the eye, however, are absorbed slowly. Most importantly, the underlying cause (such as a retinal tear or diabetes) must always be treated.
No, do not stop your medicine on your own. You should make this decision together with the doctor who prescribed it. In most cases, a bleed on the white of the eye does not require stopping the medicine.
Bleeding after a blow always needs an exam. There may be blood in the front chamber (hyphema), raised eye pressure or retinal damage. Do not rub your eye or press on it, and see an eye doctor the same day.
Related pages
References
- Tarlan B, Kiratli H. Subconjunctival hemorrhage: risk factors and potential indicators. Clin Ophthalmol. 2013;7:1163-1170. doi:10.2147/OPTH.S35062
- Spraul CW, Grossniklaus HE. Vitreous hemorrhage. Surv Ophthalmol. 1997;42(1):3-39. doi:10.1016/s0039-6257(97)84041-6
- Hollands H, Johnson D, Brox AC, Almeida D, Simel DL, Sharma S. Acute-onset floaters and flashes: is this patient at risk for retinal detachment? JAMA. 2009;302(20):2243-2249. doi:10.1001/jama.2009.1714
- Stanescu-Segall D, Balta F, Jackson TL. Submacular hemorrhage in neovascular age-related macular degeneration: a synthesis of the literature. Surv Ophthalmol. 2016;61(1):18-32. doi:10.1016/j.survophthal.2015.04.004
This article is for patient information only and does not replace an examination or medical evaluation. The right treatment is decided after your eye exam and measurements. Publication date: 25 September 2026.
Contact Prof. Dr. Fırat Helvacıoğlu with your questions
Prof. Dr. Fırat Helvacıoğlu · Veni Vidi Eye Clinic, Bağdat Cad. No: 257, Caddebostan – Kadıköy / Istanbul