Answer:
Od is the right eye and Oi is the left eye.
When you ask for "what is object," we don't know since there is no reference , clues, image, instruction, or anything.
Step-by-step explanation:
The O stands for Oculus (no not the toy lol), but for example, binoculars have the part "oculars" in it, which means "sight" or "vision." (Can be said to be the "root" of the word!)
The d in Od refers to dexter; latin for right, and i in Oi refers to sinister, which is left.