|Focusing on the eye using autofocus points|
Alternatively you can focus manually on the eye, however I typically do not. Most of the time I am too concerned with capturing the moment, that in taking the time to manually focus, I might miss it. My camera's autofocus hardly ever disappoints. I feel as though if I focused manually all the time I would probably have more user error (soft images) than the camera would error with autofocus.
Another thing to take into consideration is making sure that the eyes are well lit. Whether it is natural light or in a studio, you want to be sure that the whites are white and the iris shows color and texture. You may need to reposition your model, have them tilt their head up a bit, etc. to ensure that the eyes are properly lit.
It’s also good practice to focus on the eyes for different subjects including pets, wildlife and candid photos. When you get in the practice of focusing on the eye, it will become innate and your portraits will improve dramatically. Having the eye in focus and emphasized makes the subject more interesting.
|The Eye of the Tiger (had to do it)|