The international development charity Sightsavers is launching its biggest ever fundraising appeal to raise £30m over three years to restore the sight of one million people.

The campaign, called A Million Miracles, will launch tomorrow with the first live streaming of a cataract surgery in Malawi, the charity said.

Viewers will be able to watch in real time as Winesi March, 69, has his sight restored, meaning he will be able to see his grandson for the first time.

The appeal aims to raise funds over the next three years to perform one million sight-restoring surgeries across Africa and Asia. 

Fundraising will take place in the UK, Ireland, the US, India, Italy and Sweden, the charity said. 

Tobin Aldrich, director of global fundraising at Sightsavers, said: “For £30 we can make a blind person see.  You can’t get a simpler or more powerful proposition for donors.

"We will focus our A Million Miracles appeal on the stories of individuals whose sight we are saving, using innovative technology to bring supporters together with the people they are helping.”

Sightsavers said there are 20 million people globally living with cataracts, which cause sight to become blurred and gradually lost completely, mostly in developing countries.

But cateracts are treatable with an operation (pictured) that can take as little as 10 minutes and costs Sightsavers just £30. 

Donations made by the UK public until December will be matched pound for pound by the government as part of its UK Aid Match scheme.

Justine Greening, the international development secretary, said: “By matching all public donations to its A Million Miracles appeal we will help people in some of the poorest parts of Central and East Africa see again." 

The appeal and live surgery will be streamed from Malawi on Wednesday at 1.30pm and broadcast on Google+ and on the appeal's microsite.