They say the eyes are the windows into the soul.

Apparently, they also give you a good view of tired spleens, sluggish lymphatic systems, and states of internal distress. (And no, we aren’t talking about under-eye circles.)

That’s the theory behind iridology, a lesser-known alternative medical practice that’s been around since biblical times. According to Judy Vedder, New York’s sole full-time practitioner, iridology is best used as a diagnostic tool, not as a replacement for your G.P. In a typical session, Vedder, who is like the sweetest great aunt ever, “reads” your iris. Every area of your eye corresponds to a part of your body, and any spot or discoloration indicates a potential trouble spot.

A little wacky? Sure. But also totally neat, especially for those who find themselves endlessly fascinating. (Who, me?) And no kidding, without any prior knowledge, Vedder identified a recent kidney condition.

As for what’s going on in that head of yours, don’t give up on your shrink just yet.

Judy Vedder, New York Center for Iridology, 540 Broadway, Suite 310, between Prince and Spring Streets (212-968-0230).