PEOPLE spoke exclusively with the Magnolia Network founders and power couple for a new special edition, βChip & Joanna Gaines: Their Next Chapter,β out July 3
After noticing her sonβs eye crossing, Destiny sought answers, leading to the emotional moment he tried on glasses and saw clearly for the first time
"London holds so many memories for both of us. We first said 'I love you' here, so coming back always takes us back to that moment," the couple gushed in a press release