The last post makes me recall this weird situation while in Cuba in 2007. Anolis argenteolus seems to have a “fake eye” right at its eyelid. This is mentioned in the species’ descriptions as 2 transparent palpebral scales “as windows”… Looking at some pictures I noticed the scale’s surface being quite reflective and with some iridescence, but it is hard to tell whether they really can see thru it or whether it is just a false eye so when they roost or they close their eyes during the day they are able to show that they still alert. According to Williams & Hecht (1955), these “windows” in the lower eyelids are presumed to act as “sunglasses” in order to reduce light intensity, though I saw the animal doing this even in shady situations. Or they may serve to detect movement while sleeping (Vergner and Polak, 1996).