Layers Of The Retina

The purpose of the retina is to receive light that the lens has focused. The retina is structured of several layers of nerve cells photoreceptors pigmentation and blood vessels which line the inside of the eyeball.

Sensory Systems Lab

Light must pass through the overlying layers to reach the photoreceptor cells which are of two types rods and cones that are differentiated structurally by their distinctive shapes and functionally by their sensitivity to different kinds of light.

Layers of the retina. The optic nerve contains the ganglion cell axons running to the brain and additionally incoming blood vessels that open into the retina to vascularize the retinal layers and neurons fig. Retina ret ĭ nah the innermost of the three tunics of the eye surrounding the vitreous body and continuous posteriorly with the optic nerve. Rods function mainly in dim light and provide black and white vision.

The primary light sensing cells in the retina are the photoreceptor cells which are of two types. The retina is approximately 0 5 mm thick and lines the back of the eye. The retina is a thin layer of tissue that lines the back of the eye on the inside.

Observing the mouse retina through a microscope reveals a structure like a three layer cake with each layer made up of different nerve cells that sequentially receive process and relay information. The retina is a complex transparent tissue consisting of several layers only one of which contains light sensitive photoreceptor cells. This usually occurs when fluid passes through a retinal tear causing the retina to lift away from the underlying tissue layers.

The neural retina consists of several layers of neurons interconnected by synapses and is supported by an outer layer of pigmented epithelial cells. It is located near the optic nerve. A retinal detachment is defined by the presence of fluid under the retina.

How it works retinal layers structure types of damage photoreceptors connective hole wrinkle in the macula sugar balance vitamin a. But the arrangement of the layers is the reverse of what one might expect. The first layer is made up of rods and cones and the other two transmit impulses from the rods and cones to the optic nerve.

Defect in the chm gene can cause choroideremia leaky blood vessels can expand in the retina causing wet age related macular degeneration amd and diabetic retinopathy. The retina is composed of light sensitive neurons arranged in three layers. Layers of the retina choroid this is made up of a layer of blood vessels that supply oxygen and nutrients to the retina.

Simple Anatomy Of The Retina By Helga Kolb Webvision