What is the purpose of a retrobulbar block?

The purpose of a retrobulbar block is to block the ciliary ganglion and the associated nerves that supply sensation to the eye and the surrounding structures. This technique is primarily used in ophthalmic surgery to provide regional anesthesia for procedures involving the eye, such as cataract surgery or retinal procedures. By anesthetizing these specific structures, the block helps to relieve pain and discomfort during the surgery, allowing the patient to undergo the procedure without the need for general anesthesia.

Additionally, the retrobulbar block can also provide akinesia (lack of movement) of the extraocular muscles, which is advantageous during surgery as it immobilizes the eye, enabling better access and visualization for the surgeon. This selective anesthetic effect on the ciliary ganglion and surrounding nerves is key to the retrobulbar block's effectiveness as a targeted pain management strategy in eye surgery.