Intravitreal injection is a procedure to place a medication directly into the vitreous cavity, to treat some retinal conditions such as age-related macular degeneration, diabetic retinopathy, central retinal vein occlusion, retinal vascular disease, and infection. This method is most often used to get a higher level of medicine to the retina. The medicine can treat certain eye problems and help protect the vision.
The vitreous cavity comprises a large portion of the eyeball. It is a clear gel-like substance that occupies the space behind the lens and in front of the retina at the back of the eye.