Anti VEGF Eye Injections and Retinal Treatment

Anti VEGF eye injections are used for some conditions that affect the retina and central vision. If a clinician has mentioned them, it is natural to want a plain explanation of what the treatment is, why it may be suggested and what happens afterwards. This guide describes the general process and the questions worth asking. It cannot decide whether injections are right for your eye.

What anti VEGF means

VEGF stands for vascular endothelial growth factor. Anti VEGF medicines reduce new blood vessel growth and swelling. They are used for some retinal conditions in which abnormal vessels or fluid affect the macula, the small central part of the retina that helps with detail, colour and central vision.

Conditions for which this treatment may be used include wet age-related macular degeneration, diabetic macular oedema, swelling caused by retinal vein occlusion and myopic choroidal neovascularisation. That list does not mean every person with one of those diagnoses will receive the same medicine or the same number of injections. An ophthalmologist considers the scan, the diagnosis, the eye and the response to previous care.

People with diabetes may already attend retinal checks. Keeping those visits matters even if vision seems unchanged. Our guide to diabetes and yearly retina checks explains why an examination can find changes before a person notices them.

How the injection is given

The medicine is injected into the vitreous, the gel-like substance inside the eye. The clinician places the injection through the white outer part of the eye, called the sclera. This is known as an intravitreal injection. The treatment is carried out by an eye-care team using a clean clinical procedure.

People’s experiences differ. RNIB describes the procedure as generally quick and not usually painful. That does not mean nobody feels discomfort, and it is fine to tell the team if you are anxious or have questions. Ask what will happen before, during and after the injection, and whether someone should accompany you home. The RNIB guide to anti VEGF treatment explains the injection route, possible effects and follow-up in more detail.

The person giving treatment should explain the plan for your specific eye. If you do not understand a term or instruction, ask for it to be repeated in everyday words. You can also ask how to contact the clinic if you have a concern after leaving.

Why the appointment plan varies

Some people need a series of injections and regular reviews. Others may have a different pattern. The timing can depend on the condition, the medicine and how the retina responds. The schedule described for one diagnosis should not be copied to another person’s treatment.

Follow-up is part of the treatment, not an optional extra. The eye team may check vision, examine the eye or review imaging to see whether swelling or abnormal vessels have changed. If an appointment is difficult to attend, contact the clinic as early as possible to ask what to do. Do not decide on your own to skip a review because the eye feels comfortable.

A dilated examination is one way an eye professional may assess the retina. Our guide to what a dilated eye examination checks explains the general process. Your own team can say which tests are needed for the treatment plan.

Possible effects after an injection

RNIB notes that many possible complications come from having an injection in the eye rather than from the medicine itself. Common short-term effects described on its page include a slight ache, temporary floaters, a red or bruised appearance on the white of the eye, and a gritty or sore feeling. The exact experience varies, and the clinic should explain what to expect in your case.

Less common complications can be serious. RNIB lists infection, glaucoma, retinal detachment, inflammation inside the eye, bleeding and cataract among rare complications. The presence of a risk does not mean it will happen. Ask the eye specialist how the risks relate to your own health and what symptoms should prompt a call.

Use the contact instructions given by your clinic. If you experience an effect that concerns you after treatment, contact the treating service and explain when the injection took place. Do not rely on a general article to assess an individual symptom.

What the treatment may and may not do

The aim is often to stabilise sight and prevent further loss. Some people may have improvement in vision or less distortion, but the result depends on the eye and the condition. The medicine may not help other eye problems that are present at the same time. A clinician is best placed to discuss what outcome is realistic for your scan and starting vision.

Ask the team to separate three ideas: what the medicine is intended to change, what it may not change and how progress will be measured. An injection does not guarantee that sight will return to an earlier level. The value of treatment is assessed against the findings and the aim agreed with the ophthalmologist.

Questions before agreeing to treatment

• Which retinal condition is being treated in my eye?
• What did the scan show, and what is the aim of the first injection?
• How will you decide whether another injection is needed?
• What effects are expected afterwards, and which changes need an urgent call?
• Who should I contact if I cannot attend or have a concern between appointments?

It is reasonable to ask how the plan could change if the eye responds well or not as expected. Write down the answers and keep the clinic number with your appointment information. If you would like a family member to listen, ask whether they can join the discussion.

Preparing for a treatment visit

Follow the instructions from the treating clinic. Bring the medicines you use or a current list, and tell the team about allergies and other eye conditions. Ask whether you should arrange transport, especially if your vision is blurry after the appointment. Do not add, stop or change medicines because of information in a general guide.

If you feel anxious, say so before the procedure begins. The team may be able to explain each step and give you time to ask questions. You can ask what will happen if you need a pause. Clear communication can make the visit easier to understand, even when the treatment itself feels unfamiliar.

If more than one medicine is being discussed, ask for the names to be written down and how the team will decide between them. Do not choose a product based on another person’s experience. The appropriate medicine, interval and number of visits can differ, and the plan belongs to the treating ophthalmologist.

Arrange a way to keep track of appointments before leaving the clinic. Some people use a calendar reminder; others ask a family member to help. If travel or cost makes a visit difficult, tell the clinic early so you can ask what options are available. Missing a planned review without telling the team can leave an important change unchecked.

After a visit, keep the written advice where it can be found. If a symptom worries you, use the clinic’s own contact route and explain the timing. Do not wait for a general article to decide whether an individual symptom is serious.

After the visit

Use the follow-up plan provided by the clinic. Keep the appointment date, any written instructions and the contact number together. If your sight seems stable, still follow the agreed schedule. The team uses examinations and scans, not only how the eye feels on a particular day, to decide what comes next.

For new or worsening symptoms, contact the clinical team that is caring for you. If you are unsure which service to use, the PEBS Hospital contact page can help you ask about general eye-care enquiries; it does not provide an individual treatment decision. Information for people who wish to support eye care is on the donate page.

This article is general information and does not replace an examination by an eye doctor.