Kearns-Sayre syndrome (KSS) is a rare mitochondrial myopathy that usually develops before 20 years of age. It demonstrates multisystemic involvement with a triad of cardinal features: progressive ophthalmoplegia. pigmentary retinopathy. and cardiac conduction abnormalities. https://countryscenesaddleryandpetsuppliers.shop/product-category/argentina-cow-leather-one-ear-headstall/