Posterior Sub-Tenon Injection

A posterior sub-Tenon injection is a procedure where medication is injected into the space beneath the Tenon’s capsule, a protective tissue layer surrounding the eye. This procedure is commonly used to deliver steroids or other medications directly to the posterior segment of the eye, such as the retina or optic nerve, to treat conditions like macular edema, diabetic retinopathy, uveitis, and other inflammatory eye disorders. The injection allows for a higher concentration of medication to reach the affected area, enhancing the treatment’s effectiveness.

At Desai Eye Institute, the procedure is typically performed under local anaesthesia to ensure patient comfort. The eye is numbed using topical anaesthetic drops, and a fine needle is inserted through the conjunctiva (the clear membrane covering the eye) to deliver the medication into the sub-Tenon space. This approach allows for precise delivery of the medication, with minimal discomfort and relatively quick recovery.

Posterior Sub-Tenon injections are often used as an alternative to intravitreal injections, especially in cases where there is a risk of infection or for patients who cannot undergo more invasive procedures.

Medical Equipment Needed for Posterior Sub-Tenon Injection

Sterile Needle (for injection)
Syringe (for holding and administering medication)
Sterile Gloves (for hygiene and safety)
Topical Anesthetic Drops (for numbing the eye)
Antiseptic Solution (for cleaning the eye before the procedure)

Sterile Drapes (to maintain a sterile field)
Ocular Speculum (to keep the eyelids open during the procedure)
Patient Chin Rest (for proper positioning during the injection)
Post-Injection Eye Shield (to protect the eye after the procedure)
Monitor (to observe for any immediate reactions post-injection)

Posterior Sub-Tenon Injection