You want Composition, not Inheritance, Here's a good overview of Inheritance vs Composition.
To elaborate, Inheritance represents a possible "is a" relationship. For example, if you have a Letter class, the particular letter M "is-a" letter. If you have a Vehicle class, "Audi A4" is a Car, which could be a subclass of vehicle. (though you might not want inheritance here either, YMMV)
Composition represents a "has a" relationship. My garage is not a Car, but it "has a" car. "Audi" is not a letter, but is has a (bunch of) letters.
In your example, nobody would say that the face "is an" eye. But it "has" 0, 1, or 2 eyes.
Modern "best practice" is to favor composition over inheritance, so, when it doubt, don't subclass.