EyePhone is the new application for iPhone which might prove useful to an ophthalmologist in the field to quickly assess a persons vision. It includes several ophthalmic tests such as Ishihara, near vision acuity, amsler grid and fixation target. Flashlight and pupil gauge are also there.
I am not sure how much useful this app will turn to be. If nothing, those Ishihara test plates look pretty amazing. Nevertheless, it is very exciting to see that creative medical apps for the iPhone seam to be appearing on regular basis.