Reception of light rays, transmission to the bipolar cell layer and ganglion cell layer and finally transmission through the optic nerve. These retinal layers are connected by synapses and supported by the outer layer of pigment epithelium which provides nutrients to the retina. The retina contains approx. The part with a high concentration of cones is called the macula, which is around 5.
Whereas, the most important one part of the macula is its centre called the fovea, where the highest concentration of cones are located. This allows the human eye to achieve a sharp and visually detailed colour vision, crucial for reading for example. The peripheral part of the retina is composed of approx. The bipolar cells are a type of neuron that connects the rods and cones with the ganglion cells, this is called synaptic connection.
The retina processes the information gathered by the photoreceptor cells and sends this information to the brain via the optic nerve. Basically, the retina processes a picture from the focused light, and the brain is left to decide what the picture is. Conditions such as retinal detachment , where the retina is abnormally detached from its usual position, can prevent the retina from receiving or processing light.
This prevents the brain from receiving this information, thus leading to blindness. The central retinal artery is a blood vessel inside the eye. It provides essential nutrients to the retina. The retina lines at the back of the eye…. Short in length, the central retinal vein courses through the optic nerve. It carries blood away from the retina toward the heart. The retina is a…. The jejunum is one of three sections that make up the small intestine.
Learn about its function and anatomy, as well as the conditions that can affect…. Hypertensive retinopathy. Chronic high blood pressure can damage the tiny blood vessels that nourish the retina, leading to significant vision problems. Risk factors for hypertensive retinopathy are the same as those for high blood pressure, including obesity, lack of physical activity, eating too much salt, a family history of hypertension and a stressful lifestyle.
Solar retinopathy. This is damage to the macula from staring at the sun, which can cause a permanent blind spot scotoma in your visual field. The risk of solar retinopathy also called solar maculopathy is greatest when viewing a solar eclipse without adequate eye protection. Detached retina.
A retinal detachment — a pulling away of the retina from the underlying choroid layer of the eye that provides its nourishment — is a medical emergency. If the retina is not surgically reattached as soon as possible, permanent and worsening vision loss can occur. It's essential to keep your retina functioning properly to enjoy a lifetime of good eyesight. Many retina problems can be detected by your eye doctor before you notice any significant symptoms.
Routine eye exams enable your eye doctor to examine your eyes for signs of macular degeneration and other serious retina problems so treatment can begin as soon as possible. If you haven't had an eye exam recently, you can find an eye doctor here. If your eye doctor discovers a retinal detachment or other serious retina problem, he or she may refer you to an ophthalmologist who is a retina specialist for surgical or medical care.
Remington, Lee Ann.
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