The eye Layers of the eye corneoscleral coat
- Slides: 23
The eye
一. Layers of the eye § corneoscleral coat : fibrous layer, include the sclera, the white portion , and the cornea, the transparent portion. § vascular coat : include the choroid , the stroma of the ciliary body and iris. § retina : the inner layer, include an outer pigment epi. The inner neural retina, and the epi. Of the ciliary body and iris.
eyeball sclera choroid retina cornea macula pupil lens Optic nerve iris Ciliary body
cornea § Corneal epi. : nonkeratinized stratified squamous epi. , 5 -6 layers of cells. § Bowman’s membrane:anterior basement membrane , a homogeneous-appearing layer on which the corneal epi. rests. § Corneal stroma: composed of thin lamellae each lamella consists of parallel bundles of collagen fibrils. No blood or lymphatic vessels. § descemet’s membrane:posterior basement membrane , is the basal lamina of corneal endothelial cells. Separates the corneal endothelium from the adjacent corneal stroma. § Corneal endothelium:a single layer of squamous cells covering the surface of the cornea that faces the anterior chamber. Provides for metabolic exchange between the cornea and aqueous humor.
Cormeal epithelium Anterior basement membrane Corneal stroma Posterior basement membrane Corneal endothelium
sclera § Is an opaque layer that consists predominantly of dense CT. § The corneoscleral limbus : is the transitional zone between the cornea and sclera. An abrupt transition from the avascular cornea to the well-vascularized sclera occurs here. § Sclera venous sinus: in the irisocorneal angle contains the apparatus for the outflow of aqueous humor which is produced by the ciliary processes.
sclera
Anterior chamber Scleral venous sinus Trabecular meshwork
iris l. Pupil locate in the center. l. Anterior chamber:between the iris and the cornea. l. Posterior chamber:between the iris and vitreous body. 1. anterior layer:a discontinuous layer of fibroblasts and melanocyte. 2. stroma:LCT, highly vascularized and with abundant pigmented cells. constrictor pupillae muscle. 3. epi. : anterior-myoepithelium, dilator pupillae muscle. 4. posterior-pigment epithelial cells.
iris Anterior chamber Posterior chamber 前房 Constrictor Pupillae M
Ciliary body § Is the thickened anterior portion of the vascular coat and is located between the iris and choroid. Ciliary muscle The stroma Epithelial layer
lens Ciliary process
retina Represent the innermost layer of the eye l. Neural retina: inner layer that contains photoreceptors. l. RPE, the outer layer that rests on and attached to the choroid.
Neural retina § § § Nonvisual part, Optic part. Optic papilla: where the optic nerve joins the retina. Is devoid of photoreceptors. A blind spot in the visual field. Fovea centralis : a shallow depression located lateral to the optic papilla. Is the area of greatest visual acuity. Macula lutea: a yellow-pigmented zone surrounds the fovea.
Ganglion C Bipolar C Rod C Cone C pigment epi.
retina Ganglion C Pigmented Epi. choroid sclera
Visual cell(HE) Nuclei of visusl C External processes Pigmented epi.
Macula lutea & fovea centralis
Optic papilla
Crystalline lens Lens capsule Epi. Lens fiber
Crystalline lens § Is a transparent, avascular, biconvex structure. § The components of the lens: ① lens capsule, a thick basal lamina ② subcapsular epi. , a cuboidal layer of cells. on the anterior face of the lens ① lens fibers, derived from subcapsular epi.
Vitreous body
Vitreous body § Is the transparent jelly-like substance that fill the vitreous chamber in the posterior segment of the eye.
- Corneoscleral coat
- Tunic
- What helps maintain the eyeball's spherical shape
- 3 layers of the eye
- An eye for an eye meaning
- An eye for an eye hammurabi
- Hammurabi's code activity
- Behold he is coming
- Birds eye view worm's eye view
- An eye for an eye a tooth for a tooth sister act
- Hammurabi code eye for an eye
- F
- Anemia eyes vs normal
- Chúa yêu trần thế alleluia
- Sự nuôi và dạy con của hổ
- đại từ thay thế
- Vẽ hình chiếu vuông góc của vật thể sau
- Công của trọng lực
- Thế nào là mạng điện lắp đặt kiểu nổi
- Tỉ lệ cơ thể trẻ em
- Lời thề hippocrates
- Các loại đột biến cấu trúc nhiễm sắc thể
- Vẽ hình chiếu đứng bằng cạnh của vật thể
- độ dài liên kết