Content of the video: Introduction: 0:00 Mnemonic for Ophthalmic Artery: 0:53 Dorsal Nasal: 0:59 Central retinal Artery: 1:19 Muscular branches: 1:42 Long and Short Posterior Ciliary arteries: 2:12 Ocular Circulation: 2:22 Anterior/Posterior Ethmoidal artery: 4:06 Blood supply of the eyelids: 5:31 Ophthalmic Vein: 5:49 ——————————- Mneumonic for Ophthalmic Artery: DR MCLESSI – D: Dorsal Nasal Artery – communicates with the angular artery of the facial artery – R: Central Retinal Artery – Supply the Retina – M: Muscular branch of ophthalmic artery: supply extraocular muscles, and give off: ○ Anterior ciliary artery § Give off a conjunctival branch for the vascular zone of the conjunctiva § Give off a branch for major arterial circle – C: Long and Short Posterior Ciliary Artery: pierces the eye from the backside, lies in the choroid, and forms the major arterial circle MAC and minor arterial circle (intramuscular arterial circle) IMC – L: Lacrimal artery: supplies the lacrimal gland ○ Lateral palpebral artery – E: Ethmoidal artery ○ Anterior ethmoidal artery § Goes to anterior cranial fossa and supplies the anterior meninges, then goes down through the cribriform plate to the nasal cavity ○ Posterior ethmoidal artery – S: Supraorbital artery: Supraorbital foramen to the forehead, anastomose with frontal branch of superficial temporal artery – S: Supratrochlear artery: Frontal Foramen – for skin and muscles of the forehead – I: Internal or Medial palpebral artery Ocular Circulation : – Major Arterial Circle of Iris (MAC) ○ Formed by the Long Posterior Ciliary artery and branch of the anterior ciliary artery. ○ MAC supplies the Iris and ciliary processes – Intramuscular arterial circle (ICM) ○ Formed by the branch of the anterior ciliary artery and the short posterior ciliary artery ○ Supply outer and posterior part of the ciliary muscles Nasal Blood Supply : – Anterior Ethmoidal Artery – Posterior Ethmoidal Artery – Sphenopalatine artery – Greater palatine artery – Superir Labial Artery – They anastomose at the nasal septum and form Little’s Area or Kisselbach’s area, which is the area you nosebleed from. Blood supply of the eyelids: – Superior Palpebral Arch and Inferior Palpebral Arch are formed by: ○ Medial Palpebral Artery ○ Lateral Palpebral Artery (from Lacrimal Artery) Ophthalmic Vein: – Superior Ophthalmic Vein – communicates with the angular vein as nasofrontal vein ○ Central retinal vein for the retina – Inferior Ophthalmic Vein – communicates with the angular vein ○ Give off Branch for the pterygoid plexus ○ Give off a branch for the superior ophthalmic vein – Varicose veins (2 superior and 2 inferior) – contribute to the major arterial circle and intramuscular arterial circle in the choroid