Sub-Tenon injection

Sub-Tenon injection is an ocular route of drug administration. It involves administration of a medication to the area between the sclera and the Tenon's capsule.^[1]

Sagittal section of the human eye showing the Tenon's capsule, labelled Fascia bulbi

Posterior sub-Tenons steroid injections (PSTSI) is used in the treatment of posterior ocular inflammation, such as chronic uveitis.^[2] This route is also reported to be used to administer triamcinolone acetonide (a corticosteroid) in the treatment of macular telangiectasia type 1.

Also, it is used in the ocular anesthesia.^[3]