眸光
[móu guāng]
'眸光' refers to 'gleam of eyes'. Eyes are known as windows to the soul and thus the luster or radiance therein could mean liveliness, intelligence, beauty and so on. Using this internet name probably expresses a wish that one can convey oneself well via gaze; besides, also hints that the named person attaches much attention to eyes or related features, possibly because their owner feels proud of having beautiful eyes themselves.