The Power of Gray - The Photoshop: Professional Retouching and Compositing Tips, Tricks, and Techniques - page 141

Figure 2.68 Traces of lens flare you may not want in your picture
4. Go to Edit > Step Backwards to remove the lens flare. Now add a new blank layer
to the top of the layer stack by going to Layer > New > Layer. Name the layer lens
flare , set the mode to Hard Light, select the Fill with Hard-Light-neutral color
(50% Gray) checkbox, and click OK ( Figure 2.69 ) .