"One-Eyed" in Japanese

There are two ways to say "one-eyed" in Japanese:

1. sekigan
   隻眼
   For one-eyed characters that had two eyes, but lost one.
2. tangan
   単眼
   For one-eyed characters that always had one eye, cyclops-like.

Source: japanesewithanime.com (CC BY-SA 4.0)