An Odd-Eyed rat has one eye that is a different and lighter color than the other. This is usually very distinct, such as black/pink or ruby/pink. The rat's body may have any recognized color or marking, but Odd-Eyed is associated with High-White Markings and will usually occur on those rats.

There are multiple factors involved in Odd-Eyed rats, they are not directly inheiritable, but they are associated with High-White genes and as such should be considered at-risk for Megacolon.

AFRMA

"Odd-eye rats may be shown in any recognized color. The unique feature is one eye pink and one eye dark ruby or black. The markings, if any, to be judged at the judge’s discrection and may be in a recognized or unrecognized pattern."

RSA

"Odd-eye rats may be shown in any recognized color. The unique feature is one eye pink and one eye dark ruby or black. The markings, if any, to be judged at the judge’s discretion and may be in any recognized or unrecognized pattern."

RatsPacNW

"Not a separate section but will be judged if present.

Odd-eyes: Two eyes of different colors.  May be black / ruby or ruby / pink.  The deepest contrast is best.  Can be shown in any recognized color and marking."

URS

"Rat is to have one dark ruby or black eye, and one pink eye, with a clear and obvious difference between the two. Color and markings to be judged according to their own standards."