ꙮ

Meet 'multi-ocular o'. This is the fever-dream of some 15th-century Russian scribe. He was writing about 'many-eyed seraphim', and decided that no ordinary O could do justice to them. Somehow, his doodle found its way into unicode.

For the more sedate eye-lovers, there is also Ꙩ (monocular o), and Ꙫ (binocular o)