Heterochromia

Heterochromia describes the condition of having two differently colored eyes. Chris claims to be heterochromic (right eye green, left eye blue) and treats the trait as something of a matter of pride, making it a prominent feature of his Gary-Stu renditions. He also boasted of the fact when attempting to charm Anna McLerran, informing her that the condition arose following a case of pinkeye. This detail understandably digusted Anna.

In spite of all this, the condition isn't particularly if at all noticeable upon examination of Chris, and the less kind amongst us might presume that it is only mentioned at all for want of any other endearing characteristics.