Instructions:
+ Step 1:
The first thing we will do is open our photograph or image. In this case, the following is used. You may notice that in the vicinity of the muzzle and around the eyes, the picture look somewhat blurry.
+ Step 2:
A simple way to focus, and thus achieve the desired sharpness is simply using Filter> Sharpen. This option comes with default settings in Photoshop. Furthermore, we can achieve the same effect, but indicating some parameters. Then we'll go to Filter> Sharpen> Smart Sharpen, which will open the following window:
The Result:



