Mini-Retina Created with Stem Cells......

Researchers have made retina cells that can detect light from stem cells. Image - Credit: X. Zhong. C. Gutierrez and M.V. Canto-Soler at the Wilmer Eye Institute, Johns Hopkins University School of Medicine.
Scientists have created what they say is essentially a miniature human retina in a dish, using human stem cells.

This development could one day lead to treatments for those with several forms of vision loss, including blindness, researchers added.

The retina is the layer of cells at the back of the eyeball that helps the eye sense light and relay visual data to the brain. Many forms of vision loss result from the malfunction or death of the light-sensitive cells known as photo-receptors in the retina. The human eye belongs to a general group of eyes found in nature called "camera-type eyes." Instead of film, the human eye focuses light onto a light sensitive membrane called the retina.

Here’s how the human eye is put together and how it works:

The cornea is a transparent structure found in the very front of the eye that helps to focus incoming light. Behind the cornea is a colored ring-shaped membrane called the iris. The iris has an adjustable circular opening called the pupil, which can expand or contract depending on the amount of light entering the eye.

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