How Do I Do That in Photoshop?

Remove Purple or Green Fringe?

Go under the Filter menu and choose Lens Correction, then zoom in really tight on an area that has this color fringe problem (these are chromatic aberrations). Now, click on the Custom tab and drag the Chromatic Aberration slider that matches the color fringe problem you’re having to the right until the color fringe is gone (you might have to move more than one slider). That being said, I prefer to use Camera Raw’s Lens Corrections to remove chromatic aberrations because it has an automatic function you can turn on, ...