Sometimes when using the flash when taking photos, the eyes of people portrayed in red appear . Most cameras have some device to avoid this effect. But, once the picture is taken, this effect can be corrected from Photoshop .
We open the photo in Photoshop .
We chose the Brush Tool red – eye from the Tool Panel (located next to the Patch Tool ).
Photohop: red-eye correction brush

To correct the effect of each eye, we click on the pupil. We can increase the value of the Darkening Amount field if the color of the pupil does not appear completely black. The Pupil Size field increases or decreases the area affected by the tool.