This was one of my images from the studio, but I always felt the eyes were too dark.
I decided to save three copies at different exposures as tiffs rather than jpegs as not to compress the file.
I then over-layed the three images and altered to black and white

Overall I think this brought my image to life, bringing detail not only to the eyes but also to various sections of the jacket and buckles.

You can get carried away with this process and should try to capture everything in the studio with the camera