SAN FRANCISCO (KRON) —  On Sunday, a big Alcatraz swim underway in San Francisco, it’s called, “swim for sight.”

Ron and Lorie Hirson will host the 4th annual Alcatraz Swim for Sight benefiting That Man May See, the support foundation of UC San Francisco Department of Ophthalmology.

The goal is, to recruit 100 courageous swimmers who will join them in their efforts to eliminate eye diseases and blindness worldwide.

KRON4’s Averi Harper joins us live from Aquatic Park where swimmers begin their registration.

Check out the video for more information.