<p>Mark first appeared on "The Doctors" during Season 1, to share about his experience traveling abroad
to change his eye color from brown to blue. Ten years later, Mark is blind in his right eye.</p><p></p>| <p>Mark first appeared on "The Doctors" during Season 1, to share about his experience traveling abroad
to change his eye color from brown to blue. Ten years later, Mark is blind in his right eye.</p><p></p> |