Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-4010415-20140724022522

162.225.204.119 wrote: 1. Ruby has Silver eyes, a sign of blindness. Is she was blind, she would have died a long time ago if not recently. If she was blind, they would be more white than silver, and I'm not sure if her pupils would be visible. She can obviously see.

In a panel, I think last year, Monty mentioned something about a rare eye color or something like that, and/or two characters being related sharing an eye color or something. I'm guessing he was talking about Ruby's silver eyes, since that's the only reason they would have Ozpin draw attention to the fact that Ruby's eyes are silver. In-universe, it's just Ozpin making an observation. Out-of-universe, it's the writers saying "Hey, audience, her silver eyes are important!"

Also, I'm here to provide a link to what EmbraceTheHood said about Monty confirming Yang and Ruby are half sisters and Summer Rose is/was Ruby's mother. SOURCE!!!