text:  While retinitis pigmentosa takes Mark's vision, his family gives him hope, whether at the family business or at home with his wife and sons. He knows he's not fighting alone. For 50 years, the Foundation Fighting Blindness has funded research into treatments and cures for blinding retinal diseases, providing hope to people with vision loss. And for Mark, winning the fight means being there for his family. The Foundation Fighting Blindness. Together, we're winning. Help us end blinding diseases at fightingblindness.org.