What are the 3 main layers of the retina?
The retina is organized into three primary layers, the photoreceptive layer, the bipolar cell layer, and the ganglion cell layer.
How is light processed in the retina?
The retina functions much like the film in a camera. It is responsible for capturing all of the light rays, processing them into light impulses through millions of tiny nerve endings, then sending these light impulses through over a million nerve fibers to the optic nerve.
What is retinal processing?
The processing of visual signals within the retina can be analyzed in detail because the organization of synaptic connections is well understood (Figure 1), and light responses can be recorded from all the major types of neuron. Signals can pass from photoreceptors to ganglion cells through bipolar cells.
What is neurosensory retina?
THE NEUROSENSORY RETINA. The neurosensory retina, or inner layer, consists of three layers of nuclei (ganglion cell, inner and outer nuclear cell layers) and three layers of fibres (nerve fibre, inner and outer plexiform layers). The neurosensory retina is transparent and is thinnest at the fovea.
What are the 4 layers of retina?
The cellular layers of the retina are as follows: 1) The pigmented epithelium, which is adjacent to the choroid, absorbs light to reduce back reflection of light onto the retina, 2) the photoreceptor layer contains photosensitive outer segments of rods and cones, 3) the outer nuclear layer contains cell bodies of the …
How light enters the eye steps?
For children with normal vision, the following things happen in this order:
- Light enters the eye through the cornea.
- From the cornea, the light passes through the pupil.
- From there, it then hits the lens.
- Next, light passes through the vitreous humor.
- Finally, the light reaches the retina.
What is the function of Iris?
The iris controls the amount of light that enters the eye by opening and closing the pupil. The iris uses muscles to change the size of the pupil. These muscles can control the amount of light entering the eye by making the pupil larger (dilated) or smaller (constricted).
What is a Rhegmatogenous retinal detachment?
Rhegmatogenous detachments are caused by a hole or tear in the retina that allows fluid to pass through and collect underneath the retina, pulling the retina away from underlying tissues. The areas where the retina detaches lose their blood supply and stop working, causing you to lose vision.
What are the 10 layer of retina?
Layers from outside in: (1) retinal pigment epithelium; (2) rods and cones (photoreceptors); (3) external limiting membrane; (4) outer nuclear layer; (5) outer plexiform layer; (6) inner nuclear layer; (7) inner plexiform layer; (8) ganglion cell layer; (9) nerve fiber layer; (10) inner limiting membrane; (11) vitreous.