Bionic eyes and the latest invisibility experiments are among the exhibits at a science fair in London.
Researchers say the bionic eyes, which are on show at the Royal Society Summer Science Exhibition , could be a low-cost way to help tens of thousands of people.
The prosthetics are worn like glasses and contain a small camera connected to a tiny powerful computer.
The software recognises objects of significance and uses LEDs within the glasses to light them up, allowing users to see nearby items more clearly.
Scientists are carrying out a year-long study on the device which it is hoped could provide a non-surgical option those suffering from eye diseases.
Dr Stephen Hicks, who worked on the research at the University of Oxford, says making the device appealing to wear is crucial.
He said: "We're aiming to design a visual aid that is as discreet and economical as possible. No one really wants to wear a bulky camera or computer headset.
"It's very satisfying to think that the relatively low cost of its components should make this device easily available to the people who need it most."
Harry Potter fans will also be able to see how close they could be to getting their own invisibility cloak, just like the boy wizard.
Professor Ulf Leonhardt from the University of St Andrews will show his attempts to develop a blueprint for a cloaking device.
His theory suggests bending light around an object using artificial optical materials in order to provide the ultimate disguise.