What a retinal tear is
The retina is the thin, light-sensitive layer that lines the inside of the back of your eye. It works rather like the film in an old camera or the sensor in a digital one, capturing the image that your brain then interprets as sight. For it to do its job, it needs to lie flat and smooth against the wall of the eye.
A retinal tear is a small break or hole in this delicate lining. Think of wallpaper that is firmly stuck to a wall: if something tugs hard enough at one spot, the paper can split. A retinal tear is that split. It is not the same as a retinal detachment, but it is the event that most often comes before one, which is why it matters.
A retinal tear: a small break in the retina through which fluid can pass.
Why retinal tears happen
Most retinal tears happen during a posterior vitreous detachment (PVD), the natural, age-related process in which the gel that fills the eye separates from the retina. Usually the gel peels away cleanly. In a minority of cases it remains stuck at one point and tugs hard enough to tear the retina as it pulls free. This is why a sudden change in floaters or flashes always deserves a prompt examination.
Some people are more prone to tears than others. The most significant factor is short-sightedness (myopia), because a longer eye has a thinner, more stretched retina. Previous cataract surgery, a previous tear or detachment in either eye, a direct injury to the eye, and a thinning of the peripheral retina called lattice degeneration all raise the risk. A family history of retinal detachment is also relevant.
The warning signs of a retinal tear
A retinal tear is painless, so the only clues are visual. None of these symptoms proves that a tear is present, but any of them should prompt a same-day eye examination rather than a wait-and-see approach.
- A sudden shower of new floaters, especially many small dark dots at once
- New or increasing flashes of light, usually at the edge of your vision and most obvious in dim light
- A shadow, dark curtain, or veil appearing at any edge of your sight
- A single large new floater, often shaped like a ring or cobweb
- Any new floaters or flashes following a blow to the eye or head
New flashes of light in one eye are one of the most important warning signs to act on.
Why a tear needs prompt attention
On its own, a retinal tear does not usually threaten your sight. The concern is what can follow. Once there is a break in the retina, fluid from inside the eye can pass through it and collect behind the retina, lifting it away from the wall of the eye in much the same way that water can seep under a loose tile and lift it from the floor. That separation is a retinal detachment, and if it reaches the central part of the retina the effect on vision can be severe and lasting.
The reassuring part is that a tear caught before it has led to a detachment can almost always be dealt with quickly and effectively. The whole purpose of seeking early assessment is to find and seal a tear while it is still just a tear.
How a retinal tear is treated
Treating a retinal tear is usually straightforward. The most common approach is laser retinopexy, in which a laser is used to create a series of tiny, controlled spots of scarring around the tear. As these spots heal they weld the retina to the wall of the eye, sealing the edges of the break so that fluid can no longer pass through. An alternative, particularly for tears in certain positions, is cryotherapy, which uses a freezing probe applied to the outside of the eye to achieve the same effect.
Both are done in the outpatient clinic, take only a few minutes, and do not involve an operation in the usual sense. Once a tear has been sealed, the risk of it progressing to a detachment is greatly reduced. This is exactly why early assessment is so worthwhile: a few minutes of laser can prevent a major operation later.
In summary
- A retinal tear is a small break in the light-sensitive lining at the back of the eye
- Most happen during a posterior vitreous detachment, the gel separating from the retina with age
- It is painless, so the only warning signs are new floaters, flashes, or a shadow in your vision
- An untreated tear can let fluid pass through and lead to a retinal detachment
- Found early, a tear is sealed quickly with laser or freezing treatment in the clinic
- New floaters or flashes always deserve a prompt, same-day eye examination
Learn more about floaters and the retina
Floaters explained →Common questions
Is a retinal tear an emergency?
It is urgent rather than an immediate emergency, but the distinction is fine and it is safest to treat it as something needing same-day assessment. A tear that is found and sealed quickly rarely causes lasting harm, whereas one left unchecked can progress to a detachment. If you have new floaters or flashes, arrange to be seen the same day.
Can a retinal tear heal on its own?
A tear does not reliably heal by itself, and it is not safe to assume it will. Some tears stay stable for a long time while others progress to detachment, and there is no way to tell which is which without an examination. This is why tears are sealed deliberately with laser or freezing treatment rather than left to chance.
Does laser treatment for a retinal tear hurt?
Most people find it very tolerable. The eye is numbed with drops, and the treatment usually causes nothing more than a sensation of bright light and occasionally a mild ache. It takes only a few minutes and is carried out while you sit at a machine similar to the one used to examine your eyes.
What happens if a retinal tear is left untreated?
An untreated tear can allow fluid to pass behind the retina and lift it away from the wall of the eye, causing a retinal detachment. A detachment that reaches the central retina can cause permanent loss of vision. Sealing the tear early is what prevents this, which is why prompt assessment matters.
Will I definitely get a retinal detachment if I have a tear?
No. Not every tear progresses to a detachment, but enough of them do that treatment is recommended once a tear is found. Sealing the tear removes most of that risk, so the sensible path is to have any new floaters or flashes examined promptly and treated if a tear is present.
This page is for general educational purposes and does not constitute medical advice. If you are concerned about your vision, please seek same-day assessment from a qualified eye care professional. Last reviewed May 2026 by Chris Matthews, Consultant Ophthalmologist.
