05/08/2024
What is Intravitreal Injection ?
Intravitreal injection is the method of administration of drugs into the eye (directly into the vitreous). It is used to treat various eye diseases such as age related macular degeneration (AMD), diabetic macular edema and diabetic retinopathy, macular edema due to vein occlusions or certain ocular inflammatory conditions, and infections inside the eye (endophthalmitis).
As compared to eye drops (topical administration) this method is beneficial for a more localized delivery of medication to the targeted site. It also minimises the adverse effects to the other body tissues caused when medications are given systemically (injections or tablets).
What are commonly used Intravitreal Injections?
Anti-VEGFs (Accentrix, Lucentis, Razumab, Eylea, Pagenax)
Steroids (Dexamethasone, Triamcinolone, Fluocinolone)
Anti-microbial (Antibiotics, Antifungals, Antivirals)
What are the indications of Intravitreal Injections?
Disorders or diseases that can be treated with Intravitreal Injections include:
Age related macular degeneration
Macular edema
Diabetic Macular Edema
Secondary to Vein Occlusion
Pseudophakic Cystoid Macular Edema
Uveitis related Macular Edema
Diabetic Retinopathy
Retinal Vein Occlusions
Non Infectious Inflammations
Infections
Endophthalmitis
Retinitis
What is the procedure for Intravitreal Injections?
The exact procedure and technique of Intravitreal Injection varies from one hospital to the other.
At Koylanchal i9 Eye Hospital, the Intravitreal Injection is done in the operation theatre (to reduce the chances of infection).
Eye drops to dilate the pupil
Anesthetic eye drops to numb the eye
Antibiotic eye drops
Cleaning the eye and surrounding skin to prevent infection (Your face may also be covered to keep the eye sterile)
A device to hold the eye open during treatment
An injection of anti-VEGF or steroid drugs
Antibiotic eye drops.
What are the possible risks and complications of Intravitreal Injection?
Intravitreal Injections are relatively very safe.
The side effects / risks of Intravitreal Injection can be broadly classified into drug related side effects and procedure related side effects. However, the least would be exhaustive and hence we are mentioning a few side effects / complications here.
Subconjunctival hemorrhage or redness
Irritation or discomfort of the eye
Pain or discharge
Blurred vision or changes in vision
Seeing “spots” in your vision
Bleeding in the eye (vitreous hemorrhage), retinal detachment
Cataract progression / formation
Retinal detachment
Increased eye pressure (glaucoma)
Intraocular infection (endophthalmitis)
Very rarely, systemic side effects of drugs can occur. These include high blood pressure, nose and throat infection, and headache, arterial thrombo-embolic events such as TIA, heart attack and stroke.
The goal of treatment is to prevent further loss of vision. Although some patients have regained vision, the medication may not restore vision that has already lost, and may not ultimately prevent further loss of vision caused by the disease.