Embryology of the Eye and Orbit

Sep 22, 2018 by in OPHTHALMOLOGY Comments Off on Embryology of the Eye and Orbit

Embryology of the Eye and Orbit Overview The embryologic development of the eye is by its very nature a highly ordered and complex process of tissue proliferation, differentiation, and organization….

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The Neurosensory Retina

Sep 22, 2018 by in OPHTHALMOLOGY Comments Off on The Neurosensory Retina

The Neurosensory Retina Overview The retina (from the Latin “rete,” for net) is classically comprised of the layers of neuronal and glial cells termed, the neurosensory retina, and a single…

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The Optic Nerve and Visual Pathways

Sep 22, 2018 by in OPHTHALMOLOGY Comments Off on The Optic Nerve and Visual Pathways

The Optic Nerve and Visual Pathways Overview The optic nerves (cranial nerve II) are large, bundled tracts that convey the retinal ganglion cell (RGC) axons from each eye to the…

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The Retinal Pigment Epithelium

Sep 22, 2018 by in OPHTHALMOLOGY Comments Off on The Retinal Pigment Epithelium

The Retinal Pigment Epithelium Overview The retinal pigment epithelium (RPE) plays a central role in maintaining the health and function of the retina, especially the avascular outer retinal layers containing…

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Choroid and Choroidal Circulation

Sep 22, 2018 by in OPHTHALMOLOGY Comments Off on Choroid and Choroidal Circulation

Choroid and Choroidal Circulation Overview The blood supply to the choroid is distinct from the more visible retinal circulation, and functionally provides critical nutrients and oxygen to the metabolically demanding…

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The Vitreous

Sep 22, 2018 by in OPHTHALMOLOGY Comments Off on The Vitreous

The Vitreous Overview The vitreous body occupies approximately 75% to 80% of the total volume of the eye, filling the vitreous cavity between the lens and aqueous humor-filled posterior chamber,…

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Crystalline Lens and Zonules

Sep 22, 2018 by in OPHTHALMOLOGY Comments Off on Crystalline Lens and Zonules

Crystalline Lens and Zonules Overview The crystalline lens is avascular, biconvex, and receives no innervation or lymphatic supply (Fig. 10.1). While it is not the major optical element in the…

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Anatomy of the Aqueous Outflow Pathways

Sep 22, 2018 by in OPHTHALMOLOGY Comments Off on Anatomy of the Aqueous Outflow Pathways

Anatomy of the Aqueous Outflow Pathways Overview Aqueous humor, the clear nutritive fluid that sustains the avascular cornea, lens, and trabecular meshwork is produced by the ciliary body and secreted…

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The Ciliary Body

Sep 22, 2018 by in OPHTHALMOLOGY Comments Off on The Ciliary Body

The Ciliary Body Overview The ciliary body performs functions relating to aqueous production, aqueous outflow, and accommodation. It is the sole source of aqueous humor production and it also facilitates…

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