Joss Stone has donated a pair of her sunglasses to a Sightsavers charity auction.

Joss Stone's donated sunglasses

Joss Stone's donated sunglasses

The 29-year-old singer took to Twitter on Tuesday (29.11.16) to share a picture of her purple framed sunglasses, which she has donated to the charity as part of the Specs Appeal campaign.

The campaign aims to auction off celebrity spectacles, with the proceeds going toward helping the Sightsavers charity in their quest to aid people with blindness and disability.

Alongside the picture of the sunglasses, Joss wrote: "I've donated my specs to @Sightsavers #SpecsAppeal to help people with blindness & disability. Bid on them here: (sic)"

Other celebrities who have donated their glasses to the cause include model Kate Moss, singer Rita Ora, Ringo Starr, the former drummer for The Beatles, and actor Daniel Radcliffe.

Fans of the stars can bid for their favourite pair of glasses on, where the charity say they are helping "change lives" by putting an end to "preventable blindness".

The description on the eBay seller's page reads: "A group of celebrities has generously donated eyewear to raise awareness and funds for Specs Appeal, helping Sightsavers change lives in its mission to eliminate preventable blindness. If you want to own a pair of Daniel Radcliffe's glasses, or those belonging to David Walliams, Dawn French, Emma Watson, Jenson Button, Kate Moss, Kelly Osbourne, Liv Tyler, Meryl Streep, Rita Ora, Robbie Coltrane, Sarah Jessica Parker, Sean Bean, Stephen Fry, Vic Reeves, Vivienne Westwood,, and many, many more, get bidding."

At present, the most expensive pair of glasses on the site have a highest bid of £326.30, and are the glasses worn during races by professional road racing cyclist Chris Froome.

Close behind, Ringo Starr's vintage 80s specs are currently fetching £294.07 for the charity.

Bidding on all items closes in six days, on Monday December 5.