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This Concept Map, created with IHMC CmapTools, has information related to: 1 Point Retrobulbar Nerve Block, 1 Point Retrobulbar Nerve Block Advantages Provides excellent peri-operative analgesia, 1 Point Retrobulbar Nerve Block How is it done? Procedure (MO), 1 Point Retrobulbar Nerve Block Structures Blocked Structures of the eye external ocular muscles Including: Cranial Nerve II - Optic Nerve Cranial Nerve III - Oculomotor Nerve Cranial Nerve V - Trigeminal Nerve (Branches of the Maxillary and Opthalmic nerves) Cranial Nerve VI - Abducens Nerve, 1 Point Retrobulbar Nerve Block How is it done? Alternative Procedures: Retrobulbar 4 Point nerve block Peterson Nerve Block, 1 Point Retrobulbar Nerve Block Disadvantages 1.Injection into a surrounding blood vessel - DEATH 2.Injection into the Cerebrospinal fluid surrounding the optic nerve - collapse, seizures, respiratory and cardiac arrest. 3. Risk of trauma to the globe 4. Risk of trauma to the local tissues 5.Risk of initiating the oculocardiac reflex., 1 Point Retrobulbar Nerve Block General Use Retrobulbar injection using local anaesthetic desensitises the structure of the eyes and also paralyses the external oular msucles., 1 Point Retrobulbar Nerve Block Species Cattle Horses