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ANATOMY OF THE EYES

ANATOMY OF THE EYES. JI LOPEZ, CAMILLE JI LORENZO, ADRIAN. MUSCLES OF THE EYES. THE EYES. The outer layer  (sclera or white, and cornea)  is  fibrous and protective . The middle layer  (choroid, ciliary body and the iris)  is  vascular .

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ANATOMY OF THE EYES

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  1. ANATOMY OF THE EYES JI LOPEZ, CAMILLE JI LORENZO, ADRIAN

  2. MUSCLES OF THE EYES

  3. THE EYES • The outer layer (sclera or white, and cornea) is fibrous and protective. • The middle layer (choroid, ciliary body and the iris) is vascular. • The innermost layer (the retina) is nervous or sensory.

  4. SCLERA • “white of the eye” • It is the fibrous, protective, outer layer of the eye containing collagen and elastic fiber • In children: thinner & translucent -> bluish tinge • In the elderly, fatty deposits on the sclera can make it appear slightly yellow.

  5. SCLERA • The thickness of the sclera varies from 1mm at the posterior pole to 0.3 mm just behind the rectus muscle insertions • The collagen of the sclera is continuous with the cornea. Four layers of the sclera are: • episclera • stroma • lamina fusca • endothelium

  6. CORNEA • Avascular, transparent  front part of the eye that covers the iris, pupil, and anterior chamber. • Together with the lens, the cornea refracts light, with the cornea accounting for approximately two-thirds of the eye's total optical power Slit lamp image of the cornea, iris and lens

  7. Layers of the Cornea 1. Anterior Corneal epithelium - non-keratinized stratified squamous epithelium 2. Bowman's layer  -  a tough layer that protects the corneal stroma, consisting of a similar irregularly arranged collagen fibers 3. Corneal stroma (SubstanciaPropia) - thick, transparent middle layer, consisting of regularly arranged collagen fibers along with sparsely distributed interconnected keratocytes, which are the cells for general repair and maintenance

  8. Layers of the Cornea 4. Descemet's membrane  - thin acellular layer that serves as the modified basement membrane of the corneal endothelium, from which the cells are derived 5. Corneal endothelium - a simple squamous or low cuboidal monolayer. - responsible for regulating fluid and solute transport between the aqueous and corneal stromal compartments.

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