Posts tagged eye

Dianne Ashworth, who has severe vision loss due to the inherited condition retinitis pigmentosa, was fitted with a prototype bionic eye in May at the Royal Victorian Eye and Ear Hospital. It was switched on a month later.

“All of a sudden I could see a little flash … it was amazing,” she said in a statement.

“Every time there was stimulation there was a different shape that appeared in front of my eye.”

The bionic eye, designed, built and tested by the Bionic Vision Australia, a consortium of researchers partially funded by the Australian government, is equipped with 24 electrodes with a small wire that extends from the back of the eye to a receptor attached behind the ear.

It is inserted into the choroidal space, the space next to the retina within the eye.

“The device electrically stimulates the retina,” said Dr Penny Allen, a specialist surgeon who implanted the prototype.

“Electrical impulses are passed through the device, which then stimulate the retina. Those impulses then pass back to the brain (creating the image).”

The device restores mild vision, where patients are able to pick up major contrasts and edges such as light and dark objects. Researchers hope to develop it so blind patients can achieve independent mobility.

(Source: futurenow321)

This striking image actually shows part of an ox’s eye, and the capillaries in it. Capillaries are small blood vessels, which act as the connective network between arteries and veins. The capillaries have been made visible by injection of an insoluble dye into the artery that supplied them.

(Source: futurenow321)