How It Works

Inside laser eye surgery

Lasers have been used to help people with short and long-sightedness (or myopia and hyperopia) for a couple of decades, but the practice of using incisions in a person’s eye to improve their vision has been around for over 100 years.

It all started in 1898 when eye surgeons would make small cuts in the front

You’re reading a preview, subscribe to read more.

More from How It Works

How It Works6 min read
Picturing the Planets
Over 3,000 years ago, Babylonian astronomers discovered that five bright points of light moved across the night sky in a different way from all the other stars. These were the planets we now call Mercury, Venus, Mars, Jupiter and Saturn. In those ear
How It Works1 min read
Fast Facts
NEIL ARMSTRONG’S BOOTS ARE STILL FLOATING IN SPACE This much urine contains enough minerals to charge your phone for three hours Global warming is affecting gravity in Antarctica The world’s oldest fossil forest was recently discovered near Minehead,
How It Works5 min read
How Astronauts Train For space
In space, astronauts lose an average of 1.0 to 1.5 per cent of mineral density in weight-bearing bones per month To build up their bodies, cope with confinement and monitor machinery, astronauts must embark on rigorous training programs For many, it’

Related Books & Audiobooks