deatil looks okay...try with someone elses eye so you can see where your pointing and focusing, though this really isn't bad at all.
Vi x
Great capture and fantastic iris detail Robbo, albeit imo more of a square-crop would suit the image. It will be interesting to see what improvement can be made using someone elses eyes, perhaps you can find a few folk to photograph and compile a set showing different iris colours?
look forward to seeing the attempt with you GF's eye...If you can get it that detailed while your not looking where your focusing...
Vi x