Ocular Circulation

What supplies all blood to the eyeballs?

Ophthalmic artery

What is ocular ischemic syndrome?

Not enough blood supply, problem with ICA, cholesterol plaques buildup inside ICA, loss of circulation to ON, retina, choroid

What does the central retinal artery pass through?

Optic nerve

Where is the central retinal artery in the disk?

Nasal

What does the central retinal artery supply?

Inner retina (bipolar, ganglion cells) & optic disk

What forms the superior & inferior lateral palpebral arteries?

Lacrimal artery

What arteries connect to form the palpebral arcades?

Lateral palpebral arteries & medial palpebral arteries

What does the lacrimal artery supply?

Lacrimal gland & eyelids

What forms a ring around the ON?

Short posterior ciliary arteries

Where do the short posterior ciliary arteries go?

Only goes to the posterior portion of the eyes

Short posterior ciliary arteries are always more?

Medial

What does the short posterior ciliary arteries supply?

Posterior choroid (photoreceptors) & optic nerve (retrobulbar)

Cilioretinal artery arises from?

Short posterior ciliary arteries

What artery is found in 30% of the population?

Cilioretinal artery

What anastomoses to form the major circle of the iris?

Long posterior ciliary arteries & anterior ciliary arteries

What do long posterior ciliary arteries supply?

Ciliary body, iris, anterior choroid

What does the posterior ethmoidal artery supply?

Posterior ethmoid sinus & sphenoid sinus

What does the anterior ethmoidal artery supply?

Anterior & middle ethmoid sinus, frontal sinus, nasal cavity, skin of nose

What does the lacrimal artery form?

Superior & inferior lateral palpebral arteries

What does the supraorbital artery anastomose with?

Supraorbital artery from the opposite side, with supratrochlear artery, with anterior temporal & zygomatic arteries

What does the supraorbital artery supply?

Skin & muscles of forehead, SR, SO, levator

What does the muscular arteries supply?

LR, SR, IO, SO, MR, IR, levator

What do anterior ciliary arteries branch off of?

Muscular artery

What do anterior ciliary arteries supply?

Ant structures: limbus, conj, episclera, CB, iris

What do medial palpebral arteries anastomose with?

Branches of the lateral palpebral arteries (to form palpebral arcades)

What do the medial palpebral arteries supply?

Eyelids, medial canthus, lacrimal sac

What does the supratrochlear artery anastomose with?

Supraorbital artery, supraorbital artery on the other side, & anterior temporal artery of the ECA

What does the supratrochlear artery supply?

Skin & muscles of forehead

What does the dorsonasal artery anastomose with? Angular & infraorbital arteries of the ECA

What does the dorsonasal artery supply?

Lacrimal sac

What are the 3 branches of the ECA?

Facial artery, superficial temporal artery, & transverse facial artery

What is the branch of the facial artery discussed in class?

Angular artery

What does the angular artery anastomose with?

Dorsonasal artery

What does the facial artery supply?

Lacrimal sac, medial lower eyelid, skin of cheek

What are the 3 branches of the superficial temporal artery?

Anterior temporal artery, zygomatic artery, & transverse facial artery

What does the anterior temporal artery anastomose with?

Supraorbital & supratrochlear

What does the anterior temporal artery supply?

Skin & muscles of forehead

What does the zygomatic artery anastomose with?

Supraorbital artery

What does the zygomatic artery supply?

Orbicularis

What does the transverse facial artery anastomose with?

Dorsonasal artery & infraorbital artery

What does the transverse facial artery supply?

Skin of cheek around the eye

What is the branch of the maxillary artery discussed in class?

Infraorbital artery

What does the infraorbital artery anastomose with?

Angular artery & dorsonasal artery

What does the infraorbital artery supply?

Lower eyelid, lacrimal sac, IR, IO, maxillary sinus, upper teeth, upper cheek

What does the superior ophthalmic vein receive blood from?

Anterior & posterior ethmoid veins, medial palpebral veins, muscular veins of the SR & MR, lacrimal vein, central retinal vein, & superior vortex veins

What does the central retinal vein drain blood from?

Retina

What do vortex veins drain blood from?

Choroid

Superior vortex veins drain into?

Superior ophthalmic vein

Inferior vortex veins drain into?

Inferior ophthalmic vein

What does the inferior ophthalmic vein receive blood from?

Lower & lateral muscles, inferior conj, lac sac, & inferior vortex veins

What does blood from the cav sinus drain into?

Superior & inferior petrosal sinus

What does blood from the superior & inferior petrosal sinus drain into?

Transverse sinus, sigmoid sinus, & jugular vein