Catchlights in the eyes give a portrait that spark of life. But often, because of the angle of light, the intensity on one might be a bit dull, or barely visible. The quick and easy solution is to use the Dodge tool with a soft edge brush, Range – Highlights at 25% Opacity with Protect Tones unchecked. Then just stroke over the catchlight to bring it out. You will use this often so once you have it set the way you like, make a Tool Preset for the Dodge tool.