Summary of the branches of the ophthalmic artery and their anastomoses to the ECA
| Ophthalmic Artery Branch | Origin of the Ophthalmic Branch | ECA Branch |
|---|---|---|
| Proximal lacrimal artery (main branch) | Second portion of OA | MMA (through superior orbital fissure) |
| Distal lacrimal artery (inferior branch) | Second portion of OA | Anterior deep temporal artery and infraorbital artery (IMA) |
| Anterior ethmoidal arteries | Third portion of OA | Septal arteries: sphenopalatine artery (IMA), MMA |
| Posterior ethmoidal arteries | Second or third portion of OA | Sphenopalatine artery, greater palatine artery (IMA), MMA |
| Supraorbital artery | Third portion of OA | STA |
| Dorsal nasal artery | Terminal branch of OA | Angular termination of FA, infraorbital artery |
Note:—OA indicates ophthalmic artery; ECA, external carotid artery; IMA, internal maxillary artery; STA, superficial temporal artery; FA, facial artery.