Health condition · Clinically reviewed
Diabetic retinopathy, the leading cause of working-age blindness — preventable and treatable.
Damage to the retinal blood vessels from diabetes. NHS annual screening catches it early; anti-VEGF injections, laser and vitrectomy preserve vision when treatment is needed.
Why trust this guide
- 01
Clinically reviewed
Written by our editorial team and reviewed by a registered UK clinician before publication.
- 02
Sourced, not summarised
Every claim is checked against NICE, the NHS Diabetic Eye Screening Programme or the Royal College of Ophthalmologists.
- 03
Updated for 2026
Reflects current UK guidance on screening intervals, anti-VEGF therapy and laser treatment.
Key facts
Diabetic retinopathy at a glance.
The essentials, in plain English — what it is, how it progresses, how it is screened for, and how it is treated in the UK today.
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What it is
Damage to the small blood vessels of the retina caused by long-standing diabetes.
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How it progresses
Non-proliferative → proliferative → sight-threatening stages, often over years.
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UK screening
The NHS Diabetic Eye Screening Programme invites everyone with diabetes aged 12+ every year.
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First-line for DMO
Anti-VEGF injections (aflibercept, ranibizumab) for diabetic macular oedema.
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For proliferative disease
Panretinal photocoagulation (PRP) laser treats new vessel growth across the retina.
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Biggest prevention lever
Optimal HbA1c and blood pressure — better than any single eye treatment.
Why this guide matters
Silent for years, treatable when caught.
Diabetic retinopathy rarely announces itself. The three points below shape why screening, glycaemic control and prompt treatment matter so much.
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Screening finds it early
The NHS Diabetic Eye Screening Programme picks up sight-threatening disease years before symptoms.
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Treatment preserves vision
Anti-VEGF injections, laser and vitrectomy prevent most severe sight loss when started in time.
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Control does the heavy lifting
HbA1c and blood pressure targets slow every stage — more than any single eye procedure.
How the diagnosis is made
From screening photograph to a clear treatment plan.
The steps a UK diabetic eye service will normally follow, in order — so you know what to expect and why.
Phase 1 · Screening
Annual screening and baseline vision
Phase 2 · Confirming
Retinal imaging, OCT and angiography
Phase 3 · Managing
Systemic optimisation and retinal referral
- 01
Screening
Annual NHS diabetic eye screening
Everyone in the UK with diabetes aged 12+ is offered yearly digital retinal photography.
- 02
Screening
Visual acuity
A Snellen or logMAR chart establishes your baseline vision in each eye.
- 03
Screening
Dilated fundoscopy / retinal imaging
Drops widen the pupil so the whole retina can be examined and photographed.
- 04
Confirming
OCT for macular oedema
A cross-sectional scan of the macula picks up fluid that threatens central vision.
- 05
Confirming
Fluorescein angiography
A dye study maps abnormal new vessels and areas of poor retinal perfusion.
- 06
Managing
Cardiology + endocrine optimisation
HbA1c, blood pressure and lipid targets are reviewed to slow progression.
- 07
Managing
Retinal service referral
Sight-threatening disease is escalated urgently to a hospital retinal clinic.
Typical timeline: screening annually, with sight-threatening changes referred within weeks.
Symptoms
What diabetic retinopathy actually looks like.
Usually nothing early on. When symptoms do appear, they matter — here is what to look for and when to seek urgent care.
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Asymptomatic (early)
Most early diabetic retinopathy has no symptoms — which is exactly why annual screening matters.
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Blurred vision
A gradual blur, sometimes fluctuating with blood sugar levels.
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Central distortion
Straight lines look wavy or bent — a hallmark of macular oedema.
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Floaters
New floaters or cobwebs can mean bleeding into the vitreous gel.
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Dark spots or streaks
Shadows across the vision suggest haemorrhage or areas of ischaemia.
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Sudden vision loss
Painless loss of vision from a vitreous haemorrhage or retinal detachment.
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Macular oedema
Central swelling of the retina — the commonest cause of sight loss in diabetes.
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Red flag
Sudden painless vision loss — call 999 or attend a same-day retinal service.
Treatment
How diabetic retinopathy is treated in the UK.
Systemic control first, then anti-VEGF, laser or surgery where needed — what each option does, and when it is chosen.
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Glycaemic + BP + lipid control
Tight HbA1c, blood pressure and lipid targets slow every stage of the disease.
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Smoking cessation
Smoking accelerates microvascular damage — quitting is one of the highest-yield changes.
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Anti-VEGF injections
Aflibercept or ranibizumab into the eye is first-line for diabetic macular oedema.
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Panretinal photocoagulation
PRP laser across the peripheral retina shuts down abnormal new vessels in proliferative disease.
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Focal / grid laser
Targeted laser to specific leaking vessels at or near the macula.
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Intravitreal steroid implant
A slow-release dexamethasone or fluocinolone implant for selected cases of persistent DMO.
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Vitrectomy
Surgical removal of vitreous haemorrhage or tractional membranes that threaten sight.
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Screening every 3–6 months
High-risk stages are monitored more often than the standard annual review.
What this guide is based on
The sources behind every claim on this page.
UK national guidance and specialist society standards, current at the time of last review.
Key references
Guidelines and standards we relied on.
A quiet reminder
This guide is for information, not medical advice.
Your diabetes team and eye service know your history and can tell you which parts apply to you. If in doubt, keep your screening appointment.
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NHS Diabetic Eye Screening Programme (DESP). National standards and screening intervals.
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National Institute for Health and Care Excellence (NICE). Type 1 diabetes in adults (NG17) and Type 2 diabetes in adults (NG28).
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Royal College of Ophthalmologists. Diabetic Retinopathy Guidelines.
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Diabetes UK. Eye complications of diabetes: patient information.
Red flags
When diabetic eye disease becomes an emergency.
Most diabetic retinopathy is a slow burn. These are the situations where it stops being slow — and you should act today.
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Sudden vision loss
Painless loss of sight in one or both eyes — attend a same-day retinal service or A&E.
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Vitreous haemorrhage
A shower of floaters or dense shadow across vision — urgent ophthalmology review.
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Tractional retinal detachment
A curtain or veil descending across the visual field — emergency vitreoretinal referral.
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Neovascular glaucoma
A painful, red eye with high pressure from new vessels on the iris — same-day assessment.
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Pregnancy with rapid progression
Retinopathy can accelerate during pregnancy — screening at booking and each trimester.
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Post-injection endophthalmitis
Increasing pain, redness or vision loss within days of an anti-VEGF injection — 999.
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Post-PRP macular oedema flare
New central blur after panretinal laser needs prompt retinal review.
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Post-transplant DR
Kidney or pancreas transplant can unmask rapid progression — expedited screening.
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Missed screening + advanced disease
Presenting with symptoms after skipped invitations — request urgent slit-lamp examination.
Living with it
A long-term condition, but a very manageable one.
Four things that make the biggest difference day to day — habits, monitoring, treatment adherence and communication with your team.
A quiet reminder
Consistency beats intensity, every time.
Small, steady changes — kept up for months — protect vision more than a heroic week that does not last.
- 01 Daily habits
Small numbers, big vision
Every 1% drop in HbA1c meaningfully lowers your long-term risk of sight-threatening disease.
- 02 Monitoring
Do not skip the invitation
The NHS screening letter is the single most important eye appointment of your year.
- 03 Treatment
Injections are a course, not a one-off
Anti-VEGF works best as a planned series — miss doses and swelling returns.
- 04 Reviews
Tell your team about pregnancy
Pregnancy, new insulin regimens and rapid HbA1c drops all change the screening plan.
Frequently asked
Everything we get asked about diabetic retinopathy.
Quick answers on screening, symptoms, anti-VEGF injections, laser and when to worry.
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What is diabetic retinopathy?
Damage to the small blood vessels of the retina caused by diabetes. It progresses through non-proliferative, proliferative and sight-threatening stages, and is the leading cause of blindness in working-age adults in the UK.
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How often should I be screened?
The NHS Diabetic Eye Screening Programme invites everyone with diabetes aged 12 and over every year. High-risk stages, and pregnancy, need more frequent review — every 3 to 6 months.
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Does diabetic retinopathy cause symptoms early on?
Usually not. Most early disease is completely asymptomatic — which is why annual screening is essential even if your vision feels perfect.
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What is diabetic macular oedema?
Fluid leaking into the central part of the retina (the macula). It is the commonest cause of sight loss in diabetes and is treated first-line with anti-VEGF injections such as aflibercept or ranibizumab.
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What does laser treatment involve?
Panretinal photocoagulation (PRP) uses laser to treat the peripheral retina in proliferative disease and stop abnormal new vessels bleeding. Focal or grid laser targets specific leaking vessels near the macula.
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Can diabetic retinopathy be reversed?
Established damage cannot be reversed, but progression can be slowed dramatically with tight glycaemic and blood-pressure control, and sight-threatening changes can be treated with anti-VEGF, laser or vitrectomy to preserve remaining vision.
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