What camera do you use? Those are amazing pictures and cool geckos!
Very true! For the best-detailed eye-pics (especially with lower quality cameras, like mine), I set the camera down firmly on the surface about 8inches from the Leo....this is the closest distance that my cameras will properly focus. After I am as close as I can get (with a proper zoom/focus achieved), I use the computer to digitally zoom in on the eyes. After i find the best pics, I "crop" ("cut + paste") the eye to create a pic that is just a large zoomin on the eye.
Kind of a lengthy process, but placing the camera firmly on the surface prevents blurry pictures and gives the best possible results.