Eye Surgery

Diabetic Eye Disease

Surgery types, recovery, NHS vs private options, and FAQs

Overview

Diabetic eye disease refers to a group of eye conditions that affect people with diabetes mellitus. The most important of these is diabetic retinopathy, a condition in which high blood sugar levels damage the tiny blood vessels in the retina over time. Diabetic retinopathy is the leading cause of preventable blindness in working-age adults in the UK, yet with early detection through screening and timely treatment, the vast majority of severe sight loss can be prevented.

There are approximately 4.9 million people living with diabetes in the UK, and all of them are at risk of developing diabetic eye disease. Approximately one in three people with diabetes will have some degree of diabetic retinopathy, though most cases are mild and do not threaten vision. More advanced stages — proliferative diabetic retinopathy (where new, fragile blood vessels grow on the retinal surface) and diabetic macular oedema (where fluid leaks into the macula, the part of the retina responsible for detailed central vision) — require treatment to prevent vision loss.

The NHS Diabetic Eye Screening Programme invites all people with diabetes aged 12 and over for an annual retinal photograph. This free screening is one of the most important steps you can take to protect your sight. Good blood sugar control, blood pressure management, and regular screening are the cornerstones of preventing diabetic eye disease.

Symptoms

Often no symptoms in early stages — diabetic retinopathy is usually detected through screening before you notice any changes
Gradually worsening vision or fluctuating visual clarity
Dark spots or floaters in your vision (from vitreous haemorrhage)
Blurred or patchy vision, particularly affecting central vision (macular oedema)
Difficulty seeing at night or in low light
Sudden loss of vision (from vitreous haemorrhage or tractional retinal detachment)
Colours appearing washed out or faded

When Surgery is Needed

Treatment for diabetic eye disease is required when retinopathy has progressed to a sight-threatening stage. Your ophthalmologist will recommend treatment when:

Diabetic macular oedema (DMO) is present — fluid leaking from damaged blood vessels causes the macula to swell, threatening central vision. This is the most common reason for treatment
Proliferative diabetic retinopathy (PDR) has developed — new, abnormal blood vessels are growing on the retina or optic disc, which are fragile and prone to bleeding
Vitreous haemorrhage has occurred — bleeding from abnormal blood vessels fills the vitreous cavity, obstructing vision
Tractional retinal detachment is present or imminent — scar tissue from proliferative retinopathy is pulling the retina away from its underlying tissue

The decision to treat is based on the findings of retinal examination, OCT imaging, and fluorescein angiography. Treatment is most effective when started early, before significant vision loss has occurred. This underscores the critical importance of attending your annual diabetic eye screening appointments.

Types of Surgery

Anti-VEGF intravitreal injections

The first-line treatment for diabetic macular oedema (DMO) and an increasingly used treatment for proliferative diabetic retinopathy. Anti-VEGF medications (aflibercept, ranibizumab, or faricimab) are injected into the vitreous cavity of the eye to reduce fluid leakage from damaged blood vessels and inhibit abnormal blood vessel growth. Treatment typically begins with monthly injections for a loading phase, followed by ongoing treatment at intervals guided by OCT imaging and clinical response.

Panretinal photocoagulation (PRP) laser treatment

The established treatment for proliferative diabetic retinopathy. A laser is applied to the peripheral retina in hundreds of small spots, reducing the oxygen demand of the retinal tissue and causing the abnormal new blood vessels to regress. PRP is typically delivered over 2-3 sessions. It is highly effective at preventing severe vision loss from PDR, though it can reduce peripheral and night vision as a side effect.

Focal/grid macular laser

Laser treatment applied directly to leaking blood vessels or areas of thickening in the macula. This was the standard treatment for diabetic macular oedema before anti-VEGF injections became available and is still used in some cases, either alone or in combination with injections. It aims to reduce macular swelling and stabilise vision.

Vitrectomy surgery

Surgical removal of the vitreous gel from inside the eye. Vitrectomy is recommended for persistent vitreous haemorrhage (bleeding that does not clear on its own within a few months), tractional retinal detachment involving or threatening the macula, and combined tractional-rhegmatogenous retinal detachment. The vitreous is replaced with a gas bubble or saline solution. The procedure typically takes 1-3 hours and may be combined with laser treatment.

Intravitreal steroid implants

Sustained-release steroid implants (such as dexamethasone implant, trade name Ozurdex) can be injected into the vitreous cavity to treat diabetic macular oedema, particularly in patients who have not responded adequately to anti-VEGF therapy or in whom anti-VEGF is not suitable. The implant gradually releases steroid medication over several months, reducing inflammation and macular swelling. It may need to be repeated.

Recovery

Recovery from diabetic eye disease treatments varies depending on the type of intervention.

Anti-VEGF injections have minimal recovery time. The injection takes seconds, and you can usually return to normal activities the same day. Mild discomfort, redness, and blurry vision may last a few hours. You will need to attend regular follow-up appointments for ongoing monitoring and further injections as needed — treatment is typically required for many months or years.

Laser treatment (PRP and macular laser) is performed as an outpatient. Your vision may be blurred for several hours afterwards, and there may be some aching around the eye. After PRP, you may notice a reduction in peripheral vision and night vision, and some patients experience temporary worsening of macular oedema. These effects typically stabilise over weeks to months.

Vitrectomy requires a longer recovery. If a gas bubble is used, you may need to maintain a specific head position for several days to weeks, and you must not fly until the gas has absorbed (typically 2-8 weeks). Vision recovery is gradual over weeks to months. You will need to use eye drops for several weeks and avoid strenuous activity for 4-6 weeks.

Regardless of treatment, good blood sugar control, blood pressure management, and regular screening remain essential to prevent further deterioration and protect your remaining vision.

NHS vs Private

Treatment for diabetic eye disease is comprehensively available on the NHS. The NHS Diabetic Eye Screening Programme provides free annual retinal screening for all people with diabetes aged 12 and over, which is your most important line of defence against sight loss.

When treatment is needed, anti-VEGF injections, laser treatment, and vitrectomy surgery are all funded by the NHS and delivered through hospital ophthalmology departments and specialist diabetic eye clinics. NHS treatment for diabetic eye disease is delivered urgently when sight is threatened.

Private treatment may offer faster initial assessment, shorter waiting times for procedures, and more flexible appointment scheduling. However, the ongoing nature of diabetic eye disease treatment (with regular injections and monitoring over months to years) means that most patients in the UK are treated through the NHS pathway. Private injection costs are typically £800 to £1,200 per injection, and private vitrectomy costs from £5,000 to £7,000.

If you have diabetes and are not receiving annual eye screening invitations, contact your GP or local screening programme to ensure you are registered. Never miss a screening appointment — it is the most effective way to catch diabetic eye disease before it threatens your vision.

Frequently Asked Questions

Does everyone with diabetes get diabetic retinopathy?

Not everyone, but the risk is significant. Approximately one in three people with diabetes will develop some degree of diabetic retinopathy over time. The risk increases with the duration of diabetes and is higher with poorly controlled blood sugar, high blood pressure, and high cholesterol. Good diabetes management significantly reduces the risk and slows progression.

Can diabetic retinopathy be reversed?

Early, non-proliferative diabetic retinopathy can sometimes improve or stabilise with better blood sugar control. However, more advanced changes, including proliferative retinopathy and macular oedema, require medical treatment to prevent further damage. Vision already lost from diabetic eye disease usually cannot be fully restored, which is why early detection through screening is so important.

What is diabetic macular oedema?

Diabetic macular oedema (DMO) occurs when fluid leaks from damaged blood vessels in the retina and accumulates in the macula, the central part of the retina responsible for detailed vision. This causes the macula to swell and thicken, leading to blurred or distorted central vision. DMO is the most common cause of vision loss from diabetic retinopathy and is treated with anti-VEGF injections.

How often should I have diabetic eye screening?

The NHS invites all people with diabetes aged 12 and over for annual retinal screening. If your screening shows no retinopathy, you may be offered screening every two years. If changes are detected, you may be screened more frequently or referred to a hospital eye service. Pregnant women with diabetes should have screening in each trimester, as pregnancy can accelerate retinopathy.

Can laser treatment for diabetic retinopathy cause vision loss?

Panretinal photocoagulation (PRP) laser treatment can cause some reduction in peripheral vision and night vision, as it deliberately treats the outer retina to protect the more important central vision. Some patients notice a mild decrease in overall visual acuity. However, these side effects are generally considered acceptable compared to the severe vision loss that untreated proliferative diabetic retinopathy can cause. Your ophthalmologist will discuss the risks and benefits before treatment.

How can I reduce my risk of diabetic eye disease?

The most important steps are maintaining good blood sugar control (HbA1c below 53 mmol/mol or 7%), keeping blood pressure below 140/80 mmHg, managing cholesterol levels, not smoking, attending all diabetic eye screening appointments, and having regular diabetes check-ups with your GP or diabetologist. These measures can significantly reduce your risk of developing sight-threatening diabetic eye disease.

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