<prompt> Translate the following text to EnglishAlipoteza jicho lake la kulia kutokana na ugonjwa wa ndui, si katika vita na alipewa jina la utani Dokugan-ryu Mnyama mwenye Jicho Moja.  <response>: He lost his right eye from smallpox, not in battle and was nicknamed Dokugan-ryu One-Eyed Dragon . 