Diagnosis and treatment

What does the operation involve?

The surgery to repair a macular hole is called a vitrectomy. It's done by a specialist eye surgeon.

The procedure usually takes about 30 to 60 minutes. Most often, we do it under local anaesthetic. This means your eye is numbed, and you stay awake but comfortable. You won't see the details of what's happening, but you might be aware of bright lights. Sometimes, we may use a general anaesthetic, where you are asleep. Your surgeon will discuss the best option for you.

During the vitrectomy:

1. Tiny incisions: The surgeon makes three very small cuts (less than 1mm) in the white part of your eye. These usually don't need stitches.
2. Removing the vitreous gel: A tiny instrument is used to remove the jelly-like substance (vitreous gel) from the middle of your eye. This is replaced with a clear saline solution during the surgery.
3. Peeling the membrane: The surgeon may peel a very thin, innermost layer of the retina called the internal limiting membrane (ILM). This helps to relieve any pulling forces on the macula and encourages the hole to close.
4. Gas bubble: At the end of the surgery, a special gas or air bubble is put inside your eye. This bubble acts like an internal bandage, gently pressing on the edges of the macular hole to help it close and heal. The gas bubble will gradually disappear over time (see 'Types of Gas and What to Expect').
5. During the vitrectomy procedure the medicine Triamcinolone
   Acetonide may be used as an aid to visualise the vitreous. This medicine is being used as an “unlicensed product” but has been used at Moorfields for this purpose for decades. For more information visit our pages on unlicensed medicines, or discuss with your clinician if you have any questions.

Before your surgery

• Pre-operative assessment: You will have a full eye and general health check to make sure you are ready for surgery.
• Medications: Tell your surgeon about all medicines you are taking, especially blood thinners. You may need to stop some of them for a short time before surgery.
• Fasting: If you have a general anaesthetic or sedation, you will get clear instructions about when to stop eating and drinking.
• Travel arrangements: You will not be able to drive yourself home after surgery, so please arrange for someone to collect you. If you have a general anaesthetic or sedation, you must have someone to accompany you home and stay with you overnight. 

After your surgery

Important things to know

• Eye patch/shield: you will have a patch or shield over your eye to protect it. This is usually removed the day after surgery. You should wear a plastic shield at night for at least one week to protect your eye while you sleep.
• Eye drops: you will get a prescription for several eye drops (antibiotics, anti-inflammatories, and sometimes drops to control eye pressure). It's very important to use these exactly as prescribed to prevent infection and help with healing.
• Discomfort: it's unusual to have severe pain. Your eye might feel gritty, watery, or itchy for a week or two. Regular pain relief like paracetamol (as advised on the packet) should help. Do not rub your eye.
• Activity:
  • Avoid rubbing or pressing your eye.
  • Avoid strenuous activities.
  • You can usually return to light daily activities within a few days.
  • You should avoid getting water or soap directly into your operated eye for the first two weeks.
• Work: most people need at least two weeks off work. This depends on the type of work you do. Discuss this with your surgeon.
• Driving: you must not drive while there is a gas bubble in your eye. Your vision will be very blurry, and judging distances will be difficult. Your surgeon will tell you when it is safe to drive again. This can be several weeks or months.

The Gas Bubble

What to expect

A gas bubble is essential for successful macular hole surgery. It acts as an internal splint, gently holding the edges of the hole together so it can heal.

• Blurry Vision: your vision will be very poor and blurry immediately after surgery due to the gas bubble filling your eye. You won't be able to see clearly through it.
• The "Spirit Level" Effect: as the gas bubble slowly gets smaller and is replaced by your eye's natural fluid, you will start to see a horizontal line across your vision. This line will look like a "spirit level" or a wobbly line. You will be able to see above this line, but the vision below it will still be blurry or appear as if looking through water. The line will gradually move downwards in your vision until only a tiny bubble is left at the bottom, which will then disappear completely.
• Duration of Gas Bubble: the time it takes for the gas bubble to disappear depends on the type of gas used. Your surgeon will tell you which gas was used and how long it is expected to last.
  Here are the three main types of gas used and their typical duration:
  1.    SF6 (Sulphur Hexafluoride): this is a shorter-acting gas. The bubble usually lasts for 2 to 4 weeks.
  2.    C2F6 (Perfluoroethane): this is a medium-acting gas. The bubble usually lasts for 4 to 8 weeks.
  3.    C3F8 (Perfluoropropane): this is a longer-acting gas. The bubble usually lasts for 6 to 12 weeks.

Important warnings about the gas bubble

• No Flying/High Altitudes: you must not fly in an aeroplane or travel to high altitudes (e.g., mountains over 1,000 feet / 300 meters) while there is any gas bubble in your eye. Changes in air pressure will cause the bubble to expand rapidly, leading to severe pain and potentially permanent damage to your eye. Your surgeon will tell you when it is safe to fly again. You will often be given a wristband to alert others that you have gas in your eye.
• Nitrous Oxide (Laughing Gas): if you need any other surgery, dental work, or pain relief (for example, in A&E or during childbirth) while there is gas in your eye, you must tell the anaesthetist or medical staff that you have gas in your eye. Nitrous oxide, a common anaesthetic gas, can react with the gas bubble and cause it to expand dangerously.
• Sleeping Position: for a few weeks after surgery, you should avoid lying flat on your back while sleeping. This helps to keep the gas bubble in the correct position. Your surgeon may advise sleeping on your side or face down.

Anaesthesia for your operation

Most operations for macular holes are performed under a local anaesthetic, which means you will be awake throughout your operation. We will inject local anaesthetic into the area around your eye to numb your eye and prevent you from feeling any pain during the operation. You will not be able to see details of what is happening, but you might be aware of the bright lights or movement in the operating theatre. During the operation, we will ask you to lie as flat as possible and keep your head still.

General anaesthesia, under which you are asleep for the whole operation, is rarely used for macular hole surgery. If you require a general anaesthetic, you will need to follow specific instructions about eating and drinking prior to your operation.

After your operation – how your eye will feel

Your eye will feel uncomfortable, gritty, and itchy. It might appear red or bruised and the vision is likely to be very poor at first. This is normal for seven to 14 days. We will give you eye drops to reduce inflammation and to prevent infection, and will explain how and when you should use them. You can also take paracetamol for pain relief as advised on the packet. Please do not rub your eye. Your eye will take between two and six weeks to heal, but your vision might continue to improve for several months.

When to contact Moorfields immediately

Call us straight away or seek urgent medical attention if you experience any of the following symptoms after surgery:

• Severe or worsening eye pain that isn't relieved by paracetamol.
• Sudden decrease in vision (beyond the expected blur from the gas bubble).
• New flashes of light or a significant increase in floaters (small spots or squiggly lines in your vision).
• A new dark shadow or "curtain" coming over your vision.
• Pus or increasing discharge from the eye.
• Increasing redness or swelling of the eye.

You can contact us on Moorfields Direct Nurse Helpline 

Or use our virtual emergency platform

Or attend Moorfields Eye Hospital A&E

When to expect in the long term

• Vision recovery is gradual: it can take many months for your vision to stabilise, and you may continue to see improvements for up to a year.
• Residual distortion: some patients may still notice a small amount of residual distortion even after successful surgery and hole closure.
• Cataract development: it's very likely you will develop a cataract in the operated eye if you haven't already had cataract surgery.
• Glasses prescription: your glasses prescription may change after surgery. We usually recommend waiting about 3-6 months before getting new glasses.
• Regular eye checks: continue to have regular eye examinations as advised by your ophthalmologist.

Posturing after surgery: face-down positioning                

Your surgeon will advise you if you need to posture after your surgery. For some macular holes, face-down posturing is very important to help the gas bubble press against the macula and maximise the chance of the hole closing.

• How long? If advised, you will typically need to maintain a face-down position for between 3 and 7 days, usually for 45 to 50 minutes of every hour during the day. You can take a 10 to 15-minute break each hour for things like eating, using the toilet, and gentle stretching.
• What it means: face-down means your nose is pointing towards the floor. This can be achieved by:
  • Sitting at a table with your head resting on your arms or a cushion.
  • Lying on your stomach (prone) in bed with your face looking towards the floor off the end of the bed, or into a special face-down pillow.
  • Walking with your head looking towards your toes.
• Importance: Although challenging, following posturing instructions carefully may be very important for the success of the surgery.
• Tips for posturing: Whilst generally not required, you can hire or buy special equipment to help with posturing, such as face-down chairs or support pillows. Make sure you have things you need (books, remote, phone) within easy reach, you can watch screens and read whilst you are posturing.
• Night-time: At night, try to maintain the instructed position as much as possible, but getting good sleep is also important. Your surgeon will advise you on the best sleeping position.

Current understanding: while traditionally strict face-down posturing was universally recommended for long periods, recent research suggests that for many common macular holes, a less strict or shorter period of posturing (e.g., a few days, or avoiding lying on your back) may still be effective. Your surgeon will discuss the most appropriate posturing regimen for your specific macular hole based on its size and type.