The Short Version
The general concept of a blind wild lioness surviving through social support is ecologically plausible and consistent with peer-reviewed research, but the specific details of this claim — a 17-year-old lioness named Josie surviving 5 years blind at Addo Elephant National Park — are supported only by low-authority viral sources (lifestyle blogs, meme sites, YouTube). The one peer-reviewed source documents a different case in the Serengeti, not the lioness described here. The precise factual details remain unverified by any credible independent source.