There are around two million people with sight problems in the UK and the number of people at risk of the main causes of blindness is set to increase by up to 25% between now and 2012.
However, 50% of sight loss is avoidable and RNIB's SOS campaign aims to tackle the time bomb of unnecessary sight loss and promote the importance of timely access to vital treatment.
"RNIB welcomes Joan's support. Our SOS campaign aims to challenge unnecessary sight loss, to promote the importance of regular eye checks and also to highlight those areas where timely access to treatment and monitoring has saved the sight of those previously at risk of blindness."
For more information, please visit the RNIB's website.