40+
years in the field
20,000+
operations
250+
published works
90,000
patients treated
Have you been told a blood vessel is leaking in your eye?
A leaking blood vessel in the eye, often due to retinal vein occlusion (RVO), happens when a retinal vein becomes blocked and fluid leaks into the retina. This leads to swelling (macular oedema) and vision disturbance. The causes of retinal vein occlusion are usually blood clots, hardened arteries, or conditions such as high blood pressure and diabetes. There are two main types:
- Central retinal vein occlusion (CRVO) – the main retinal vein is blocked, affecting the entire retina.
- Branch retinal vein occlusion (BRVO) – a smaller vein is blocked, affecting only part of the retina.
If you are experiencing the symptoms of retinal vein occlusion such as sudden vision loss or distortion, early diagnosis and treatment can give the best chance of preserving sight.
Could it be retinal vein occlusion? How to recognise the symptoms
If you’re experiencing:
Sudden or partial loss of vision in one eye
Blurred or distorted vision
Dark spots or patches in your vision
Changes in colour perception
New floaters or flashes
Professor Williamson treats retinal vein occlusion at our London emergency eye clinic. Urgent cases prioritised for the earliest possible appointment, often within 48 hours.
How we treat a leaking blood vessel in the eye
Intravitreal injections
The most effective treatment for a leaking retinal vessel from RVO is a series of anti-VEGF injections into the vitreous (the clear gel inside the eye).
These medicines work to:
- Reduce swelling in the macula
- Limit further leakage from damaged blood vessels
- Protect and improve central vision
Treatment is often given as a series of injections over several months, with regular scans to monitor progress.
Read about intravitreal injections.
Medical management
Treatment of underlying conditions such as high blood pressure, diabetes, or glaucoma to prevent recurrence.
Why choose our clinic for retinal vein occlusion care

Renowned retinal expertise
Over 40 years of consistent surgical results in treating complex retinal conditions like retinal vein occlusion

Timely treatment to restore vision
Anti‑VEGF or steroid injections given promptly to reduce swelling and improve vision

Long‑term monitoring of your sight
Regular reviews to keep your sight stable and reduce the risk of future problems
Meet Professor Williamson
Professor Tom Williamson is one of the UK’s most experienced retinal surgeons, based in London. With over 40 years in the field, he has performed more than 20,000 operations and is recognised for both his meticulous technique and consistently successful outcomes. Known for his clear, pragmatic approach, Professor Williamson offers patients highly personalised care with continuity over the long term.

Trusted by patients for decades
“I have had regular appointments with Professor Williamson for over a decade. I have complete confidence in his skills and have not been disappointed”
Simon D.

“One call led to an immediate appointment that same morning”
William L.

“I felt confident in the diagnosis, treatment, and care I received, so when another issue arose I returned to Professor Williamson, knowing I could rely on him”
Enid R.

Step-by-step retinal vein occlusion care
Bespoke consultation in London
Your journey begins with a review of your symptoms and a detailed retinal examination, using optical coherence tomography and fluorescein angiography to assess the affected vein and check for swelling.
Clear explanation and advice
You’ll be shown your scan results and receive clear guidance on the type of vein occlusion you have and the treatment options available.
Same‑day treatment (if needed)
If swelling is present, an anti‑VEGF injection can often be given the same day to protect your vision and reduce fluid. This is a quick, well‑tolerated procedure performed under local anaesthetic.
Recovery at home
You’ll be able to go home shortly after your injection. Most patients return to normal daily activities straight away, with only minimal restrictions.
Follow‑up review
You’ll return in four to six weeks so we can review your progress and guide you on any next steps.
“I have had several procedures with Professor Williamson and I know I am in the best hands”
Janet S.
How much does treatment of retinal vein occlusion cost?
Intravitreal injections are £2200 for self‑paying patients. All costs are confirmed before treatment so you know exactly what to expect.
Insurance
We work with major insurance providers, including Bupa, AXA‑PPP, Vitality, WPA, and Aviva. As Professor Williamson is not a fee‑assured consultant, your insurer may not cover the full amount - we’ll confirm any costs with you before treatment.
Contact us
We’re here to help you understand what’s happening and guide you through your treatment with clarity and care.
