blood supply of the optic nerve

BLOOD SUPPLY OF THE OPTIC NERVEDR. DHWANIT KHETWANI

BASIC ANATOMY OF THE OPTIC NERVE

• Capillaries derived from RETINAL ARTERIOLES, which anastomose with vessels of Prelaminar region.

• Occasionally from the CILIORETINAL ARTERY, ciliary derived vessel from prelaminar region

SURFACE NERVE FIBRE LAYER

PRE-LAMINAR REGION

• Supplied by VESSELS OF CILIARY REGION• These vessels may be derived from

PERIPAPILLARY CHOROIDAL VESSELS or from SHORT POSTERIOR CILIARY VESSELS

• Supplied by the CILIARY VESSELS

• These vessels are derived from SHORT POSTERIOR CILIARY ARTERIES and ARTERIAL CIRCLE OF ZINN-HALLER

LAMINA CRIBROSA REGION

• Supplied by both CILIARY AND RETINAL CIRCULATION

• Ciliary circulation comes from RECURRENT PIAL VESSELS.

• CENTRAL ARTERY OF RETINA provides Centripetal and Centrifugal branches from the PIAL PLEXUS

RETRO LAMINAR REGION

INTRAORBITAL PART SUPPLIED BY TWO SYSTEMS OF VESSELS

PERIAXIAL SYSTEM OF VESSLES

AXIAL SYSTEM OF VESSELS

PERIAXIAL SYSTEM OF VESSELS

INTERNAL CAROTID ARTERY

LACRIMAL ARTERY

CENTRAL ARTERY OF

RETINA

SHORT POSTERIOR

CILIARY ARTERY

LONG POSTERIOR CILIARY ARTERY

OPHTHALMIC ARTERY

AXIAL SYSTEM OF VESSELS

THE INTRANEURAL BRANCHES OF THE CENTRAL

RETINAL ARTERY

CENTRAL COLLATERAL ARTERIES,

WHICH COME OFF FROM THE

CENTRAL RETINAL ARTERY

CENTRAL ARTERY OF THE OPTIC NERVE

INTRACANALICULAR PART

PERIAXIAL SYSTEM OF VESSELS

PIAL PLEXUS , fed by branches

from the OPHTHALMIC

ARTERY

INTRACRANIAL PART Supplied by1. PERIAXIAL SYSTEM OF VESSELS2. PIAL PLEXUS

PIAL PLEXUS(INTRACRANIAL PART)

RECURRENT BR. OF OPHTHALMIC

ARTERY

BR. OF ANTERIOR CEREBRAL ARTERY

RECURRENT BRANCH OF

ANT.SUP.HYPOPHYSEA

L ARTERY

PERIAXIAL SYSTEM OF VESSELS

VENOUS DRAINAGE OF THE OPTIC NERVE

• CENTRAL RETINAL VEIN

OPTIC NERVE HEAD

• PERIPHERAL PIAL PLEXUS• CENTRAL RETINAL VEIN

ORBITAL PART

• PIAL PLEXUS WHICH ENDS IN ANTERIOR CEREBRAL & BASAL VEIN

INTRACRANIAL PART

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