A shadow creeping across your vision is an emergency. Not tomorrow. Not after the weekend. Now.
Retinal detachment occurs when the retina, the light-sensitive layer at the back of the eye, separates from the tissue beneath it. The retina needs constant contact with the retinal pigment epithelium to receive oxygen and nutrients. Once separated, retinal cells begin to die within hours. If the detachment reaches the macula, the central retina responsible for sharp detail vision, the window for a full visual recovery narrows rapidly. Retinal detachment is an ocular emergency. The outcome depends on one thing above all others: how quickly it is treated.
What You Need to Know About Retinal Detachment
- Retinal detachment is a medical emergency. Any shadow, curtain, or sudden dramatic change in vision requires same-day assessment at an emergency eye unit
- The most common cause is a retinal tear that allows fluid from the vitreous to seep beneath the retina and lift it away
- Risk factors include high myopia, previous PVD, eye trauma, previous eye surgery, and a family history of retinal detachment
- Surgery reattaches the retina successfully in around 85 to 90 percent of cases after a single procedure
- If the macula has not yet detached, full visual recovery is possible. Once the macula is involved, central vision recovery is less predictable
- The other eye carries an elevated lifetime risk and requires regular monitoring
What Actually Happens
The retina is a thin, delicate sheet of neural tissue lining the back of the eye. Behind it sits the retinal pigment epithelium (RPE), a layer of cells that support and nourish the retinal photoreceptors. In a healthy eye the two are in close contact. In a retinal detachment, fluid accumulates between them and the retina lifts away from its support layer like wallpaper peeling from a damp wall.
Without contact with the RPE, photoreceptors stop receiving the nutrients and oxygen they need and begin to deteriorate. Peripheral retinal cells are resilient for longer than macular cells. A detachment confined to the far periphery may cause only a small shadow for days. Once it reaches the macula, central vision drops rapidly. This is not a condition that can be watched and waited on.
Types of Retinal Detachment
Rhegmatogenous retinal detachment
By far the most common type. Rhegmatogenous means “arising from a break.” A tear or hole in the retina, usually caused by the pulling force of a posterior vitreous detachment, allows liquid vitreous to pass through the break and accumulate beneath the retina. Once fluid is flowing under the retina, the detachment expands. It is progressive, not self-limiting. Surgery is needed to close the break and drain the fluid.
Tractional retinal detachment
Fibrovascular scar tissue on the surface of the retina, usually from proliferative diabetic retinopathy or a previous penetrating injury, contracts over time and physically pulls the retina away from the RPE without any break in the retinal tissue itself. The detachment tends to be more localised and progresses more slowly than a rhegmatogenous detachment, but it is no less serious when it threatens or involves the macula.
Exudative retinal detachment
Fluid accumulates beneath the retina from leaking blood vessels or inflammation, without any retinal tear or traction. Usually caused by severe uveitis, tumours, or severe hypertensive retinopathy. Treatment is directed at the underlying cause rather than the detachment itself.
Who Is at Risk?
High myopia
The most significant modifiable risk factor. The highly elongated myopic eye has a thinner, more stretched retina that is more susceptible to tears, particularly in areas of lattice degeneration. High myopes should have a dilated retinal examination at least every one to two years and should act immediately on any new floaters, flashes, or visual field changes.
Posterior vitreous detachment
The single most common trigger for retinal tears that lead to detachment. Around 10 to 15 percent of symptomatic PVDs have a retinal tear at presentation. A PVD examined and found to be clean carries a much lower subsequent risk, but new symptoms after a previously clear PVD should always be re-assessed.
Previous retinal detachment in the fellow eye
Having had a retinal detachment in one eye raises the lifetime risk in the other eye to around 10 to 15 percent. Both the fellow eye and the operated eye require ongoing monitoring. Prophylactic laser treatment to areas of lattice degeneration or previous tears may be offered by your surgeon.
Other risk factors
Blunt or penetrating eye trauma, previous cataract surgery, and a positive family history all increase risk. Lattice degeneration, a common pattern of peripheral retinal thinning visible on examination, is present in around 8 percent of the general population and is a predisposing factor, though most people with lattice never develop a detachment.
Symptoms
The classic warning signs of a retinal detachment developing from a tear:
- A sudden shower of new floaters, often described as a swarm, more numerous than previous floaters
- Frequent large flashes of light in the peripheral vision
- A dark shadow, curtain, or grey veil appearing in the peripheral visual field and advancing toward the center
- A sudden drop in visual acuity if the macula has detached
Floaters and flashes alone, without a shadow, may indicate a retinal tear rather than a full detachment. That distinction matters: a tear treated with laser before detachment occurs is a brief clinic procedure. A detachment requires surgery. Both need same-day assessment. You cannot reliably distinguish a tear from a detachment at home, and trying to is not worth the time you’re losing.
Treatment
Retinal tear without detachment: laser or cryotherapy
A retinal tear caught before detachment occurs is treated with laser photocoagulation or cryotherapy, applied around the edges of the tear to create a scar that seals it. The scar takes around two weeks to fully consolidate. This prevents fluid from flowing through the tear and lifting the retina. Simple, effective, done in the clinic under local anaesthetic. The outcome in terms of preventing detachment is excellent when the tear is treated before fluid has accumulated.
Pneumatic retinopexy
A gas bubble is injected into the vitreous cavity and the patient is positioned so the bubble floats up against the tear, temporarily sealing it. Laser or cryotherapy is then applied to create a permanent seal. The gas bubble absorbs over days to weeks. Only suitable for certain tear locations and configurations. Usually performed under local anaesthetic in the clinic or minor surgery setting.
Vitrectomy
The most commonly used surgical approach for retinal detachment is vitrectomy. The vitreous gel is removed, the retina is reattached using a laser or cryotherapy to seal the tear, and the vitreous cavity is filled with gas or silicone oil to hold the retina in place while it heals.
If gas is used, patients must maintain a specific head position (usually face-down or to one side) for several days to keep the bubble against the repair site. The gas absorbs over weeks and must be fully gone before flying or receiving general anaesthetic. If silicone oil is used, it is typically removed in a second operation several months later once the retina is stable.
Scleral buckle
A silicone band or sponge is sutured to the outside of the eye, indenting the scleral wall inward toward the detached retina and reducing the traction on the tear. Often combined with vitrectomy or used alone, particularly in younger patients with simple detachments. The buckle remains permanently in place.
After Surgery: What to Expect
Vision after retinal detachment surgery is unpredictable and recovery takes time, often months. The single most important predictor of final visual outcome is whether the macula was attached or detached at the time of surgery. Macula-on repairs, where the central retina never lifted, typically recover excellent vision. Macula-off repairs, where the detachment had already reached the central retina, can recover to surprisingly good levels but are less consistent and take longer.
In the weeks after surgery, vision is often blurry and distorted, particularly if a gas bubble is in place. This is normal and expected. The eye needs time to settle, the gas needs time to absorb, and the retina needs time to re-establish its connections. Patients who had a silicone oil fill will have blurred vision until the oil is removed in a second procedure. That’s expected, not a complication. Judging the final outcome too early almost always leads to unnecessary anxiety.
Cataract formation is common after vitrectomy, particularly in patients over 50, and often occurs within one to two years of surgery. A second procedure to remove the cataract is then needed. Knowing to expect this in advance removes a lot of the surprise when it happens.
Go to an Emergency Eye Unit Immediately If You Notice
- A shadow, curtain, or dark veil appearing anywhere in your visual field
- A sudden shower of new floaters, far more than you have experienced before
- A sudden drop in vision in one eye
- Large or frequent flashes of light, especially combined with any of the above
Do not go to your GP. Do not wait until morning. Do not monitor it at home to see if it gets better. Retinal detachment does not improve without treatment, and every hour matters when the macula is threatened. Go directly to your nearest emergency eye unit and tell them you think you may have a retinal detachment.
Frequently Asked Questions About Retinal Detachment
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Will I get my vision back after surgery?
That depends largely on whether the macula was attached or detached when you had surgery. Macula-on detachments, caught before the central retina lifted, usually recover excellent vision. Macula-off detachments can recover well, but it varies: some patients get back to near-normal, others are left with some permanent central vision loss. Honesty about this before surgery is important, because the uncertainty is real. The sooner the surgery, the better the chance. If you’re reading this because you have symptoms right now, stop reading and go to an emergency eye unit.
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How long is recovery after retinal detachment surgery?
Longer than most people expect. Initial recovery takes weeks, but full visual stabilisation often takes three to six months, sometimes longer. If a gas bubble was used, specific head positioning is required for several days to a week, which is uncomfortable and disruptive. If silicone oil was used, a second operation to remove it comes several months later. Plan for time off work, limitations on activity, and a protracted rather than a quick recovery.
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Can I fly after retinal detachment surgery?
Not if a gas bubble was used. The reduced air pressure at altitude causes gas to expand, which can cause a dangerous rise in intraocular pressure. Flying is contraindicated until the gas has fully absorbed, which takes days to weeks depending on the gas used. Your surgeon will tell you exactly when it is safe. Carry a letter stating you have had intraocular gas if you are travelling during the recovery period. General anaesthesia with nitrous oxide must also be avoided until the gas is completely absorbed. Your anaesthetist needs to know.
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What are the chances the detachment comes back?
Around 85 to 90 percent of retinal detachments are successfully repaired with a single operation. A proportion, around 10 to 15 percent, require a second or further procedure. Reoperation rates are higher in complex detachments, long-standing detachments, and those associated with proliferative vitreoretinopathy (PVR), a complication where scar tissue forms on the retinal surface. After successful repair, long-term follow-up continues because the fellow eye also carries risk.
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My other eye is also at risk. What should I do?
Tell your ophthalmologist you’ve had a retinal detachment. The fellow eye should be examined carefully for predisposing factors such as lattice degeneration, previous tears, or areas of thinning. Prophylactic laser to high-risk areas may be recommended. More importantly, know the warning signs and act on them immediately if they appear. The other eye will be watched carefully, but your own prompt action if symptoms develop is the most important protection.
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Can retinal detachment be prevented?
Not completely, but risk can be reduced. If you are highly myopic, regular dilated retinal examinations allow high-risk areas to be identified and treated before a detachment occurs. Retinal tears found during examination for PVD can be sealed with laser before they detach. Wearing appropriate eye protection during sports or activities with a risk of eye trauma removes one modifiable risk factor. Beyond this, knowing your risk and acting immediately on warning symptoms is the most effective prevention available.
If you would like to learn more, the National Eye Institute’s retinal detachment page offers a clear patient-friendly overview of symptoms, risk factors, causes, diagnosis, and treatment, including the warning signs that need urgent care right away.