Moorfields Eye Charity has launched a campaign on the London Underground to raise awareness of its annual Eye to Eye fundraising walk.
It will be the 10th anniversary of the event on June 23 and it has raised over £900,000 for Moorfields to date.
Campaign posters are being shown on the tube platform and escalators at Old Street station, as well as an animation on a digital screen at the ticket office.
Moorfields Eye Charity will celebrate the anniversary with a street party, featuring food, kids' activities and live music at the start and finish point of the walk.