Guide who lost his vision to lead visually impaired skiers on backcountry adventure

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Tyson Rettie always loved skiing.

He learned as a child, then during his teens, he moved into backcountry skiing. Eventually, Rettie ended up working as a heli-ski guide.

But that changed when he lost his vision.

Rettie, who grew up in Okotoks and now lives in Invermere, B.C., was diagnosed with a condition called Leber’s hereditary optic neuropathy (LHON) about two years ago. It’s a mitochondrial disease that makes a person’s vision deteriorate very quickly.

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