What it is
An intravitreal injection places medicine directly into the vitreous — the clear gel that fills the inside of the eye — so that it reaches the retina. The most common medicines are anti-VEGF drugs, which reduce leakage and the growth of abnormal blood vessels. Steroid medicines are used for some conditions.
Who it's for
People with wet age-related macular degeneration, diabetic macular oedema (swelling of the central retina due to diabetes), swelling after a retinal vein occlusion (a blocked vein in the retina), and some other retinal conditions, as advised by the doctor.
What to expect
The injection is given in a clean procedure room. The eye is numbed with drops and cleaned with antiseptic, a small clip holds the eyelids open, and the medicine is injected with a very fine needle in a few seconds. Your eye pressure may be checked afterwards.
Recovery
Mild grittiness, a small red spot on the white of the eye, or a few floaters for a day or two are common. Seek urgent care if pain, redness or blurred vision gets worse in the days after the injection, as these can be signs of infection. Injections usually need repeating; your doctor decides the schedule based on your scans.
Frequently asked questions
How many injections will I need?
It varies. Many people need a series of injections, with the interval adjusted according to how the eye responds on OCT scans.
Can I drive home after an injection?
It is better not to. Your vision may be blurred for a few hours, so come with someone who can take you home.
Medically reviewed by Dr. Sweta Patro
