Normally a 9-year-old boy cavorting with a big, shaggy dog isn’t anything unusual, but when Corey Haas grabbed the leash of 1-year-old Mercury last Saturday, it was a stunning sight. For both Corey and Mercury, a briard sheepdog, were born with the exact same form of hereditary blindness, Leber congenital amaurosis (LCA). And Read More
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