Sometimes you might want to take a close up picture of something interesting, perhaps even in the course of your clinic, for instance a skin lesion. If you happen only to have your PDA phone with you, it may be not possible to take macro pictures unless you have a macro lens attachment.
Some time back I got one of these cheap plastic macro lens attachment for my Palm Pre from Ebay. It takes fairly decent macro shots which the Pre can’t normally do since it does not have a zoom function. It is fixed focus but the zoom is reasonably large to get a decent close up shot. This is an example of a picture of a pill:
The lens was a cheap “jelly lens” one obtained from Ebay and looks like this:
It has a sticky rim with which you can attach to the perimeter of the phone’s camera lens. It is removable and has a cover so that it won’t stick to anything else in the closed position. It’s quite handy to keep in the pocket and I have it attached to my thumbdrive.