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Vision resuscitation with retinal implants

Vision resuscitation with retinal implants

The technology includes a smart glasses equipped with a camera, a microcomputer and an implant that is placed inside the retina, according to a report from ScienceSdili on Saturday. The implant is designed to stimulate retinal hair cells using electrodes to create a kind of artificial vision in blind people.

The retina is the innermost layer of the eye and contains millions of light-receiving cells and neurons. This very thin layer covers 75% of the eyeball area. The retina forms a light-sensitive layer and enables the visual process by converting the electromagnetic current of light into a nerve message and transmitting it through the optic nerve to the brain.

The camera in the researchers' new smart glasses captures images in a person's field of vision and sends information to a microcomputer at the end of the handle. The microcomputer converts the data into optical signals and transmits them to the electrodes inside the implant in the retina. These electrodes also stimulate retinal cells to create a black-and-white version of the image.

The system has not yet been tested on humans due to the time-consuming process of obtaining human experiments, but researchers tested it using virtual reality software and were able to see what the user was seeing.

Researchers believe that these glasses can be used to restore vision in some retinal diseases.

Some of the most important symptoms of retinal diseases:
Retinal diseases are very different and varied, but most of them are associated with decreased vision. Retinal diseases can affect any part of the retina. Some retinal diseases are curable, some have a slow healing process, and some lead to partial or complete blindness. Observing floating bands or spider webs, distortion and blurred vision, lateral vision impairment and blindness are among the most important symptoms of retinal diseases.


Some of the most important retinal diseases are:

Retinal rupture
Retinal rupture occurs when the clear, jelly-like substance in the center of the eye (vitreous) shrinks and loosens its attachment to the retina. Sometimes when the vitreous separates from the retina, part of the retina is pulled and torn or perforated. This condition is usually accompanied by a sudden sharp flash in the eye.

Retinal detachment
This condition usually occurs when the retina separates from the underlying layer. The retina receives the nutrients and oxygen it needs from a layer called the choroid, which surrounds the retina, and disconnecting from this layer leads to retinal dysfunction and vision problems.

-Diabetic retinopathy
Diabetic retinopathy (DR) is the most common eye disease in people with diabetes. The retina is located at the end of the eyeball. The light entering the eye forms an image on the retina. The image created on the retina is converted into nerve signals and the signals are sent to the brain by the optic nerves. Diabetes causes retinal damage and retinopathy. In severe cases, diabetic retinopathy leads to blindness.

In retinopathy, new abnormal blood vessels grow on the retina, reducing vision or complete blindness.

In fact, with blood vessel damage, insufficient blood flow is provided to the retinal nerve cells, and a lack of oxygen leads to the death of these cells. In this case, the body tries to solve this problem with the growth of new blood vessels, and on the other hand, diabetes causes the growth of blood vessels to not work properly and to bleed and damage the retina. This damage leads to the growth of scar tissue in the retina and the patient loses his sight over time.

-Upretinal membrane
The epithelial membrane is a scar-like tissue or layer like crushed cellophane in the upper part of the retina. The presence of this layer leads to impaired or blurred vision.

Macular degeneration
Macular degeneration or macular degeneration is one of the most common eye diseases that causes a person to lose their focused vision with age and become unable to perform activities such as studying and driving.

The macula is a small area in the retina that is responsible for central vision, allowing the eye to see details. Blurring of images, observation of dark areas, and distortion in central vision are the most important signs of age-related macular degeneration.

-Macola hole
This complication may be caused by abnormal tension between the vitreous and the retina.

Retinal pigment swelling
This disease is inherited and decreases over time.

Risk factors for retinal diseases
Usually, aging, diabetes, various medications, trauma and heat, accidents and family history expose a person to retinal diseases.

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