Intravitreal Injections and the Importance of Treating Blepharitis

Intravitreal injections are a common treatment for various eye conditions, including age-related macular degeneration, diabetic retinopathy, and retinal vein occlusion. The procedure involves injecting medication directly into the vitreous cavity of the eye, and while it is generally considered safe and effective, there are certain risks and precautions to be aware of. In this article, we will discuss the importance of treating blepharitis before undergoing an intravitreal injection.

What is Blepharitis?

Blepharitis is a common condition characterized by inflammation of the eyelids, which can cause redness, irritation, and dryness. It can also cause the eyelids to become oily or scaly, and in some cases, lead to the formation of crusts or flakes along the eyelid margin. Blepharitis can be caused by a variety of factors, including bacterial infection, allergies, or blockages of the meibomian glands.

Why is Treating Blepharitis Important Before Intravitreal Injections?

Treating blepharitis is important before undergoing an intravitreal injection for several reasons:

  1. Infection risk: Intravitreal injections can increase the risk of infection, particularly in patients with pre-existing ocular surface disease such as blepharitis. Treating blepharitis can help reduce the risk of infection and improve the overall safety of the injection procedure.
  2. Medication efficacy: Medications administered through intravitreal injections can be absorbed into the systemic circulation, which means that they can affect other parts of the body. By treating blepharitis before the injection, patients can help ensure that the medication is absorbed correctly and effectively.
  3. Comfort: Patients with untreated blepharitis may experience discomfort or irritation during the injection procedure, which can affect the overall experience and potentially increase the risk of complications.

How to Treat Blepharitis Before Intravitreal Injections

There are several ways to treat blepharitis before undergoing an intravitreal injection, including:

  1. Eyelid hygiene: Good eyelid hygiene is essential for managing blepharitis. Patients can use warm compresses and gentle cleansing solutions to clean the eyelids and remove debris or crusts.
  2. Medications: Depending on the cause and severity of the blepharitis, patients may be prescribed medications such as antibiotics or anti-inflammatory agents to help reduce inflammation and manage symptoms.
  3. Lifestyle changes: In some cases, lifestyle changes such as reducing stress or avoiding certain allergens can help manage blepharitis.


Intravitreal injections are a valuable treatment option for a variety of eye conditions, but it is important to take certain precautions before undergoing the procedure. Treating blepharitis before an injection can help reduce the risk of infection, improve medication efficacy, and increase overall comfort during the procedure. If you are scheduled to undergo an intravitreal injection, talk to your eye care professional about the importance of treating blepharitis and whether it may be necessary in your case.

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