The Power of Gray - The Photoshop: Professional Retouching and Compositing Tips, Tricks, and Techniques - page 148

Figure 2.75
2. Fill this circular selection with 50% gray by going to Edit > Fill > Contents > 50%
Gray, and click OK.
3. Keeping the selection visible, go to Filter > Noise > Add Noise. Set Amount to
400%, choose Gaussian, select the Monochromatic checkbox, and click OK ( Fig-
ure 2.76 ) .