Retina Gross Anatomy

Isabella Phan in Comparative Anatomy and Histology 2012. In most primates the retina is about 200-250 micrometers thick.

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As you look at the houses interior and exterior you will see a foundation a roof doors windows floors a plumbing system an electrical system ceilings etc.

Retina gross anatomy. This section leans heavilyon Wyszecki and Stiles 1982 an excellentbook. Grosss anatomy Three distinct regions of retina. Fibers of the optic nerve pierce the sclera at the optic discRetinal blood vessels also enter and exit.

Development of the eye. The retina is a part of the central nervous system and an ideal region of the vertebrate brain to study because like other regions of the central nervous system it derives from the neural tube. With Cajals 1892 anatomic descriptions of the cell types that constitute the retina in a number of vertebrate species and with an early understanding of the role of visual purple in photochemistry in combination with psychophysical studies of adaptation and color vision we had in the sixties the rudiments of an understanding of how the retina might be organized and functioning.

Gross Anatomy Almost the entire blood supplyof the eye comes from the choroidal vessels which originate from the ophthalmic arteriesTheleft andrightophthalmicarteries ariseasthe first major branch of the internal carotid usually where the latter break through the dura to exit the cavernous sinus. On a microanatomical level see Microscopic anatomy below it consists of neural cells that register light signals and translate them into neuronal signals that are transmitted to the brain. Retinal Tear or Detachment.

At the equator the retina has a vertical and horizontal diameter of 24 mm. Gross Anatomy of the Eye. In some individuals around 10 the ophthalmic.

The cornea is the anterior transparent portion of the outer coat. On the gross anatomical level the retinas most important features are the optic disc and the macula. A schematic section through the human eye with a schematic enlargement of the retina.

The total retina is a circular disc of between 30 and 40 mm diameter. The retina is formed during development of the embryo from optic vesicles outpouching from two sides of the developing neural tube. 1optic disc 2macula lutea 3peripheral retina retina extends from optic disc to ora serrata Surface area266sqmm 4.

Measured as a cord the distance from optic disc to the equator is 14mm in the superior meridian 14mm inferiorly 13mm nasally and 17mm temporally. Well defined circular area Diameter. The retina is a complex tissue with multiple layers of cells responsible for absorption of light and transmission of this signal to the brain.

The retina is approximately 05 mm thick and lines the back of the eye. Common Disorders of the Retina. A retinal tear or detachment is considered an ocular emergency where the light-sensitive retina is torn or detached away from the back of the eye that feeds in oxygen and nourishment.

Gross anatomy can be compared to the structure of a house as shown in a blueprint of a house or by looking at and inspecting a house in person with the naked eye. Gross Anatomy of the Eye LGN and LGB are used interchangeably and serve the same function. Overview When an ophthalmologist uses an ophthalmoscope to look into your eye he sees the following view of the retina Fig.

The retina has a dual vascular supply that is similar between the two species. 15mm All the retina layers terminate hereexcept the nerve fibre which pass through the lamina cribrosa 5. This video about ANATOMY and layers of RETINAIt contains all the important points need to know for exams.

The human retina is located on the inner surface of the posterior two-thirds to three-quarters of the eye. University of Utah Health Sciences Center. The sclera is continuous with the cornea.

The sclera is the connective tissue capsule which appears as the andquotwhitesandquot. This is a horizontal section of the eye viewed from a superior position. The eye itself is a mostly hollow organ roughly spherical in shape.

The retina is a part of the central nervous system and an ideal region of the vertebrate brain to study because like other regions of the central nervous system it derives from the neural tube. Optic disc Pale pink in colour. Items refer to the human eye unless otherwise specified.

Diabetic retinopathy occurs in people who have diabetes and it is a condition where blood vessels leak blood and fluid. The Organization of the Retina and Visual System. The 1 afferents of the visual system are the rods and cones of the retina ie the photoreceptors and the 2 afferents are the bipolar cells of the retina.

The primary layers of the retina from outermost surface to innermost surface. The retina is approximately 05 mm thick and lines the back of the eye. The total retina is a circular disc of between 30 and 40 mm in diameter Polyak 1941.

This is the first and most powerful lens of the optical system of the eye and allows together with the crystalline lens the production of a sharp image at the retinal photoreceptor levelThe white of the eye the sclera which forms part of the supporting wall of the eyeball. In the center of the retina is the optic nerve a circular to oval white area measuring about 2 x 15 mm across. The retina is formed during development of the embryo from optic vesicles outpouching from two.

From the center of the optic nerve radiate the. Lab 7 - Visual System Gross Anatomy of the Eye.

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