Laser treatment for diabetic retinopathy

Laser treatment to the back of the eye that aims to protect the sight of people with diabetic eye disease by sealing or shrinking abnormal blood vessels.

✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review

In short

Laser aims to protect your remaining sight, not to bring back vision you have already lost.
Panretinal laser can reduce side vision and worsen night and colour vision, because some healthy retina is treated to protect the centre.
Vision is blurred for hours after treatment, so you cannot drive straight afterwards and you will need more than one session.
Laser works alongside good diabetes, blood pressure and cholesterol control, and sometimes alongside eye injections.

A plain-English summary. The detail — including risks and recovery — is below.

At a glance

TypeLaser eye treatment (outpatient)

AnaestheticAnaesthetic eye drops, sometimes a local anaesthetic injection

How long it takesUsually 20–45 minutes per session; often more than one session

Hospital stayOutpatient — no hospital stay

Time off workUsually none, but vision is blurred for hours and you cannot drive straight afterwards

When you'll see resultsAims to preserve sight rather than improve it; benefit is judged over months

On the NHS?Commonly available on the NHS through diabetic eye services and screening

A general guide. Your surgeon will give you advice for your situation.

Best fit

Can substantially reduce the risk of severe sight loss in proliferative disease

Pause if

Early (background) diabetic retinopathy usually needs monitoring and good diabetes control, not laser.

Main recovery point

Vision is blurred and the eyes are light-sensitive with dilated pupils. You should not drive and should wear dark glasses on the way home.

Good aftercare

A clear plan for how many sessions are needed and how progress will be checked.

First few hours

Vision is blurred and the eyes are light-sensitive with dilated pupils. You should not drive and should wear dark...

First few days

Blurring usually clears within hours but can last a few days after extensive panretinal laser. Mild ache or...

First weeks

After panretinal laser you may notice your side vision is narrower and that night and colour vision are not as...

2 to 6 months

The specialist reviews your retina to see whether the abnormal vessels have settled or swelling has reduced, and...

Medical line illustration of retina imaging and treatment planning for Laser treatment for diabetic retinopathy. — Illustration only - not a diagnosis, medical advice or a promise of result. Your anatomy and treatment plan may differ. Vuemedics does not publish before-and-after photos.

What is laser treatment for diabetic retinopathy?

Diabetes can damage the small blood vessels at the back of the eye (the retina), a condition called diabetic retinopathy. In its more advanced stages, fragile new blood vessels can grow and bleed, or fluid can build up at the centre of vision (diabetic macular oedema).

Laser treatment uses precise bursts of light to seal leaking vessels or to treat the outer retina so that fewer abnormal vessels grow. Panretinal laser (PRP) treats the outer parts of the retina in proliferative disease; focal or macular laser treats leaking at the centre.

The key point is that laser is mainly about protecting the sight you still have, not restoring vision you have already lost. It can have trade-offs, such as reduced side vision and poorer night and colour vision, because some healthy retina is sacrificed to protect the vital central area. Good diabetes, blood pressure and cholesterol control remains the foundation of treatment.

Types & techniques

There isn't one single operation. The right approach depends on you — which is something to discuss with your surgeon.

Panretinal photocoagulation (PRP)

Many small laser burns are applied across the outer retina in proliferative diabetic retinopathy to make fragile new blood vessels shrink and reduce the risk of bleeding and detachment. Usually given over more than one session.

Focal or grid (macular) laser

Targeted laser treats leaking blood vessels causing swelling at the centre of vision (diabetic macular oedema), often used alongside or after eye injections.

Multi-spot (pattern) laser

A newer way of delivering many laser spots quickly in a pattern, which can be more comfortable and faster than older single-spot lasers.

Anti-VEGF eye injections

Injections that reduce abnormal vessel growth and swelling. They are often used for macular oedema and sometimes instead of, or alongside, laser for proliferative disease.

Vitrectomy surgery

An operation to remove blood or scar tissue from inside the eye when bleeding does not clear or the retina is being pulled, sometimes combined with laser.

Common treatments for diabetic eye disease

Treatment	Mainly used for	Trade-off
Panretinal laser	Proliferative disease	Reduced side, night and colour vision
Macular/focal laser	Central swelling	Small risk to nearby central vision
Anti-VEGF injections	Swelling, new vessels	Repeated injections needed

Treatments are often combined. Your eye specialist will explain which is right for the stage and pattern of your diabetic eye disease.

Preparing for your surgery

Understand that laser mainly aims to protect your sight, not to improve vision you have already lost.
Keep working on diabetes, blood pressure and cholesterol control, which protects your eyes over the long term.
Arrange not to drive home, as your vision will be blurred and your pupils dilated after treatment.
Bring dark glasses for the journey home, as your eyes will be light-sensitive.
Tell the team about all your medicines and any other eye problems such as glaucoma or cataract.
Ask how many sessions you are likely to need and whether injections will also be used.

What happens

Laser is done as an outpatient while you sit at a machine like the one used for an eye examination. Drops are used to widen the pupil and numb the surface of the eye, and sometimes a small local anaesthetic injection is given for more extensive treatment.

A contact lens is placed on the eye to focus the laser, and the specialist shines brief, bright bursts of laser light onto the retina. You may see flashes and feel some discomfort or a pricking sensation, especially with extensive panretinal laser. Each session usually lasts around 20 to 45 minutes, and proliferative disease often needs several sessions.

Is this operation right for me?

A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.

May not be suitable if…

Early (background) diabetic retinopathy usually needs monitoring and good diabetes control, not laser.
Some central swelling responds better to injections than to macular laser.
A very hazy view from dense cataract or bleeding may need that treating first.
Laser is not used to restore vision already lost to advanced disease.

Delay surgery if…

Blood sugar, blood pressure or general health is very unstable and needs urgent attention.
A dense bleed inside the eye blocks the view and may need clearing or injections first.
Important imaging of the macula is still awaited.
You cannot arrange not to drive after the session.

Alternatives to discuss

Optimising diabetes, blood pressure and cholesterol control as the foundation of care.
Anti-VEGF eye injections, especially for central swelling.
Steroid implants in selected cases of macular swelling.
Vitrectomy surgery if there is non-clearing bleeding or scar tissue.

Before you decide

Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.

What matters most to me?

Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.

What are all my options?

Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.

What would make me pause?

Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.

What happens if I do nothing today?

For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.

Anaesthetic choices

The safest option depends on the operation, your health, the facility and your surgeon/anaesthetist. Ask what is planned and why.

Anaesthetic eye drops

Numb the surface of the eye for most laser treatment.

Local anaesthetic injection

A small injection around the eye for comfort during extensive panretinal laser.

Benefits

Can substantially reduce the risk of severe sight loss in proliferative disease
Can shrink fragile new blood vessels and reduce the chance of bleeding inside the eye
Can reduce swelling at the centre of vision (macular oedema)
Is done as an outpatient without a hospital stay
Works alongside injections and good diabetes control to protect sight

Risks & complications

More common

Blurred vision for a few hours, sometimes a few days after extensive treatment
Discomfort or a pricking sensation during treatment
Light sensitivity and dilated pupils for several hours
Reduced side vision and poorer night and colour vision after panretinal laser

Less common

A small permanent blind spot if a burn is close to the centre of vision
Temporary worsening of central swelling after macular laser
Needing further laser or injections because the disease continues

Rare but serious

Accidental burn affecting central vision
Bleeding inside the eye triggered around the time of treatment
Significant loss of vision despite treatment

The main trade-off with panretinal laser is that protecting central vision can cost you some side vision and make night driving and colour vision worse — many but not all people keep enough vision to drive. Laser rarely improves vision and is about preventing further loss. Ask your specialist what the laser is aiming to achieve for your eyes, how it might affect your driving, and whether injections are an option instead of or alongside it.

Published figures to discuss

How well laser protects sight, and how much it affects side, night and colour vision, varies with the stage of disease and how much laser is needed. Most figures describe groups of patients and cannot predict an individual eye, so your specialist's assessment matters most.

Figure	Reported range	How to interpret it	Source / confidence
Reduced peripheral, night and colour vision after panretinal laser	Common; in one NHS source about 80% still keep vision good enough to drive	Side vision is deliberately traded to protect central vision; effects are usually permanent.	NHS — Diabetic retinopathy: treatmentnhs.ukPublished figure
Temporary worsening of central swelling after macular laser	Uncommon	Why injections are often preferred for significant macular oedema.	Guide sourcesClinical context
Permanent central vision loss from an accidental or close burn	Rare	Modern techniques and careful targeting keep this low.	Guide sourcesClinical context

These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.

Recovery — what to expect, and when

There is no surgical wound to heal, but your vision is blurred for a few hours (sometimes longer after extensive treatment) and your eyes are light-sensitive, so you should not drive immediately and should plan a quiet rest of the day.

First few hours

Vision is blurred and the eyes are light-sensitive with dilated pupils. You should not drive and should wear dark glasses on the way home.

First few days

Blurring usually clears within hours but can last a few days after extensive panretinal laser. Mild ache or grittiness can occur.

First weeks

After panretinal laser you may notice your side vision is narrower and that night and colour vision are not as good as before.

2 to 6 months

The specialist reviews your retina to see whether the abnormal vessels have settled or swelling has reduced, and whether more treatment is needed.

Ongoing

You stay under regular eye review and screening, because diabetic eye disease can progress and need further laser or injections over time.

What's normal — and not a worry

Blurred vision for a few hours after treatment
Light sensitivity and a mild ache or gritty feeling
Narrower side vision after panretinal laser
Poorer night and colour vision after panretinal laser
No immediate improvement in vision, as laser is about protection

Aftercare

Do not drive until your vision has fully recovered after each session.
Wear dark glasses and rest your eyes for the remainder of the day.
Keep working on diabetes, blood pressure and cholesterol control to protect your eyes.
Attend all review appointments and diabetic eye screening as arranged.
Report any sudden loss of vision, new floaters or a shadow promptly.
Ask about pain relief if your eye is uncomfortable after extensive treatment.
Keep a note of how many sessions you have had and what is planned next.

Before-surgery checklist

A lift home arranged (no driving after treatment)
Dark glasses for light sensitivity
Up-to-date list of medicines for the team
Diabetes, blood pressure and cholesterol monitoring continued
Review and screening appointments noted
Contact number for sudden vision changes saved

Scars and how they heal

There is no skin wound. Laser leaves small treatment marks (tiny scars) on the retina itself, which is how it works. After panretinal laser these marks across the outer retina are the reason side, night and colour vision can be reduced.

⚠ Get urgent help if…

Sudden loss of vision or a sudden dark shadow or curtain
A sudden shower of new floaters or flashes
Increasing eye pain not relieved by simple pain relief
A red, painful eye with worsening vision
Vision that keeps getting worse over days rather than recovering

Who to contact: your surgeon or clinic first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.

General guidance — it doesn't replace the specific advice your surgeon gives you.

Results & realistic expectations

A good result is that the disease is brought under control: fragile new vessels shrink, the risk of bleeding falls, or central swelling settles, so your sight is protected. Because laser is about protection, most people do not see better afterwards, and some notice reduced side, night or colour vision.

The specialist judges success over weeks to months by examining the retina and, for macular disease, by measuring swelling on a scan. Diabetic eye disease can keep changing, so continued review and good diabetes control remain important.

How long it lasts

Laser treatment marks are permanent, and treating proliferative disease can give lasting protection against severe sight loss. However, diabetes continues to affect the eyes over time, so further laser, injections or surgery may be needed in future, and lifelong eye screening is recommended.

Combining with other procedures

Laser is often combined with anti-VEGF eye injections, especially for swelling at the centre of vision (macular oedema), and sometimes with vitrectomy surgery if there is bleeding or scar tissue inside the eye. Your specialist will explain how these treatments fit together for your eyes.

Follow-up & long-term care

You will be reviewed weeks to months after treatment to check whether the disease has settled and whether more sessions are needed, and you stay in regular diabetic eye screening. Report any sudden change in vision between appointments straight away.

Lifelong diabetic eye screening and specialist review
Ongoing good control of diabetes, blood pressure and cholesterol
Further laser sessions if abnormal vessels return
Eye injections if central swelling persists or recurs
Prompt review if new floaters, flashes or a shadow appear

Revision and secondary surgery reality

Proliferative disease often needs more than one session and sometimes top-up laser later.
Injections may be added if swelling persists or new vessels return.
Surgery may be needed if bleeding does not clear or the retina is pulled.
Diabetic eye disease can keep progressing, so treatment is often ongoing.

Ask your surgeon for their own revision rate, what counts as a revision, and what is included in the written aftercare policy.

What good aftercare looks like

A clear plan for how many sessions are needed and how progress will be checked.
Joined-up care with the diabetes team for sugar, blood pressure and cholesterol control.
Regular monitoring with examination and OCT scans where relevant.
An urgent contact route for sudden vision loss, new floaters or a shadow.

What affects the cost

Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:

Number of laser sessions needed
Type of laser (panretinal, focal/macular or multi-spot)
Specialist (ophthalmologist) fee and clinic or facility fee
Whether eye injections or surgery are also needed
Imaging such as OCT scans to monitor swelling
Number of follow-up and screening appointments

Make sure your written quote includes

The ophthalmologist's fee per session
Clinic or facility fee and any imaging (OCT) costs
How many sessions are expected and whether each is charged separately
Whether injections or surgery, if needed, are included or extra
Number of follow-up appointments included
What happens, and what it costs, if more treatment is needed later

On the NHS? Treatment for diabetic retinopathy is commonly provided on the NHS through diabetic eye screening and hospital eye services; private care is used mainly for speed or choice of specialist.

You're entitled to your total cost in writing — including aftercare and any revision — before you decide.

Choosing a surgeon safely

Check your surgeon is on the GMC Specialist Register for this area.
Make sure they practise at a CQC-registered location, and look for membership of bodies like BAAPS or BAPRAS.
You're entitled to a two-stage consent process with time to reflect (a cooling-off period). The surgeon who will operate must consent you — not a salesperson.
Be wary of pressure: time-limited offers, discounts or deposits taken before you've had time to think are red flags, not bargains.
You're entitled to your total cost in writing — including aftercare and any revision — before you decide.

How Vuemedics verifies every consultant →

Questions to ask your medical professional

Take this to your consultation. A good surgeon will welcome every one of these.

What is the laser trying to achieve for my eyes — protection or treating swelling?
How might panretinal laser affect my side, night and colour vision and my driving?
How many sessions am I likely to need?
Would injections be better than, or as well as, laser for me?
How will you check whether the treatment has worked?
What symptoms should make me seek urgent help?
Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
Will you be the surgeon who carries out my operation, and who looks after me afterwards?
What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
What does a realistic result look like — and what can this operation not achieve?
What are my options, including waiting, doing nothing for now, or choosing a different approach?
Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
What is the total cost in writing, including any follow-ups, and how much time do I have to decide?

Frequently asked questions

Will laser make my vision better?

Usually not. Laser mainly protects the sight you have by controlling the disease. Some people notice reduced side, night or colour vision afterwards, especially after panretinal laser.

Does it hurt?

Drops numb the eye, but you may feel a pricking or stinging sensation, especially during extensive panretinal laser. A small local anaesthetic injection can be used for comfort.

Can I drive home?

No. Your pupils are dilated and your vision is blurred for several hours, so arrange a lift and bring dark glasses.

Why do I need more than one session?

Proliferative disease is usually treated with many laser spots, which are spread across two or more sessions to be safer and more comfortable.

Will I still need injections?

Sometimes. Anti-VEGF injections are often used for central swelling and may be used instead of, or alongside, laser. Your specialist will explain the plan for your eyes.

Is it available on the NHS?

Yes. Laser treatment for diabetic retinopathy is commonly provided on the NHS through diabetic eye services and screening programmes.

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How we made this page

Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →

Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.

Sources & standards: NHS — Diabetic retinopathy: treatment NICE — Anti-VEGF vs laser photocoagulation (NG242) Diabetes UK — Diabetic retinopathy Royal College of Ophthalmologists — patient information Cambridge University Hospitals — laser treatment for diabetic retinopathy Multispot vs conventional laser side effects — PMC

Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.

Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.