1 — Lacrimal artery; 2 — Posterior ciliary arteries; 3 — Ophthalmic artery; 4 — Internal carotid artery; 5 — Posterior ethmoidal artery; 6 — Anterior ethmoidal artery; 7 — Supra-orbital artery; 8 — Supratrochlear artery; 9 — Dorsal nasal artery; External nasal artery; 10 — Optic nerve [II]; 11 — Central retinal artery; 12 — Short posterior ciliary arteries; 13 — Medial palpebral arteries; 14 — Long posterior ciliary arteries; 15 — Anastomotic branch with middle meningeal artery; 16 — Middle meningeal artery