Iris Photography

[HelenM1967]

Does anyone have any knowledge of how to take a good Iridology photo using a digital camera? I have access to a Nikon D70 but cannot seem to focus it on the eye (presumably because it's reflective?). I have seen comments on other websites that say you can take good quality iris photos with digital cameras if you have the right settings. I am no photography expert and am struggling to find those settings! Thanks for any advice you can give.

[Eve]

Try increasing the ISO settings (or put in high ISO mode if it has one).

Trying a macro mode may also help just be careful of light and anything reflective.