Overview

Anti-VEGF injections treat wet age-related macular degeneration, diabetic macular oedema, and several other retinal conditions. The procedure is now among the most commonly performed ophthalmic treatments worldwide. The anxiety is disproportionate to the experience, which is brief and much less painful than most patients anticipate. What is harder to predict is the treatment rhythm and monitoring schedule that follows, because those vary considerably between individuals.

What Happens in the Room

You will sit or lie in a procedure chair. The area around the eye is cleaned with antiseptic (usually betadine), which is cold and has a faint smell. Anaesthetic drops are applied to numb the eye’s surface. A small clip may be used to hold the eyelid open, not all clinics use one. You will be asked to look in a specific direction.

The injection itself takes less than 30 seconds. Most patients describe pressure rather than pain. A minority feel a brief sharp sensation that disappears immediately. The preparation takes longer than the procedure. Anxiety beforehand is essentially universal and consistently outpaces the reality of the experience.

Immediately Afterward

Vision in the treated eye will be blurry immediately after the injection, usually improving within an hour. A dark floating circle may be visible in your field of vision, this is a small air bubble from the injection and dissolves within one to two days. A bright red patch on the white of the eye is a subconjunctival haemorrhage at the needle entry point. It looks alarming. It is medically insignificant and fades over one to two weeks.

The eye may feel gritty for several hours. Lubricating drops help. Avoid rubbing the eye for 24 hours. Do not drive home after the injection, arrange transport in advance. For advice on instilling the post-injection drops correctly, see the eye drops technique guide.

The Treatment Pattern

A single injection rarely produces dramatic immediate improvement. Most patients undergo a loading phase of three monthly injections before response is formally assessed with retinal imaging and vision testing. Some see improvement during this period. Others see stability, which, for a condition that would otherwise progress, is itself a meaningful outcome.

After loading, the interval between injections is determined by how the retina responds. Some patients maintain control with injections every two to three months. Others need more frequent treatment indefinitely. The honest picture is that this is long-term management rather than a cure, and the schedule is individual to each patient’s retinal behaviour.

Monitoring your vision between appointments is worthwhile. An Amsler grid, available as a printable card or a smartphone app, can help detect any change in central vision at home. New distortion or a new area of missing vision should prompt contact with your clinic before the next scheduled visit. Understanding your general eye health through a regular dilated examination helps put these monitoring visits in context.

When to Call Your Eye Doctor

• Increasing eye pain in the 24 to 48 hours after injection
• Significant worsening of vision after a period of stability
• Increasing redness with discharge, a possible sign of infection, which is rare but serious
• New floaters appearing suddenly in the weeks after treatment

Questions People Ask

• Will the injection actually improve my vision?
  That depends on the diagnosis and how much damage existed before treatment began. For wet AMD, anti-VEGF preserves vision in the majority and improves it in a meaningful proportion. Results are better when treatment begins earlier. The primary goal is to stop the disease, with improvement as a secondary outcome where the retina allows it.
• How long will I need injections?
  There is no standard answer. Some patients achieve long-term control and extend intervals considerably. Others need sustained regular treatment for years. Stopping without guidance risks rapid disease progression, the decision about extending or stopping intervals should be made with your retinal specialist, based on your imaging.
• Is there a risk of retinal detachment from the injection?
  Very low, well under 0.1 percent per injection across large series. The needle enters the vitreous cavity, so the theoretical risk exists, but in practice retinal detachment is an uncommon complication.
• I am on blood thinners. Does that increase my risk?
  The red patch on the white of the eye is more common in patients on anticoagulants, but it is cosmetic, not dangerous. More serious bleeding complications are not significantly more frequent. Do not stop blood thinners before injection without specific guidance from the doctor who prescribed them.
• Can both eyes be injected on the same day?
  Same-day bilateral injections are performed in some centres but are not universally standard. Most clinics separate the two eyes by at least one to two weeks as a precaution against bilateral complications.

This page is for general information only. Treatment plans depend on your specific diagnosis. Speak with your retinal specialist for personalised guidance. Further reading: Retina subspecialty overview, National Eye Institute: Age-Related Macular Degeneration and American Academy of Ophthalmology on diabetic macular oedema.