| Injection location |
Blockade |
|
Inferotemporal approach |
Lacrimal, nasociliary and frontal (supraorbital and supratrochlear) nerves |
|
Medial approach (placed between the caruncle and the medial canthal angle) |
Medial branches of nasociliary (long ciliary) nerve; Infratrochlear nerve and medial components of supraorbital and supratrochlear nerves |
|
Superomedial approach |
Here the needle would be in contact with a path congested with nerves, blood vessels and muscles, and this approach is therefore best avoided. |
|
Superolateral approach |
This would avoid the impediments encountered in Superomedial approach. The needle is placed through the skin of the upper lid as the relevant area of conjunctiva is inaccessible. |
