Sharpening Eyes

With a few simple steps in Photoshop, you can make the eyes in a portrait stand out. The effect can be striking, but it is also very easy to overdo. The examples in this article deliberately exaggerate the adjustments so that the process is easier to see. In a finished portrait, I would usually reduce the opacity and keep the result subtle.

There are several ways to achieve a similar effect. Here are two approaches using layers and masks. The menu names refer to older versions of Photoshop, but the principles remain the same.

Technique 1: Separate lightening and sharpening

1. Use the Marquee tool to select the eyes. Hold Shift to add to the selection. Copy the selection to a new layer with Ctrl+J and name it “Lighten eyes”.
2. Use Image > Adjustments > Brightness/Contrast to brighten the selected area. Do not worry if the effect looks too strong at this stage; you can reduce the layer opacity later.
3. Duplicate the “Lighten eyes” layer and rename the copy “Sharpen eyes”.
4. Hide the “Sharpen eyes” layer for now. Select the “Lighten eyes” layer and add a black layer mask. In older Photoshop versions, holding Alt while clicking Add Layer Mask creates a black mask.
5. Choose a soft brush with reduced opacity and paint white on the mask to reveal the brightening only where you want it. Keep the effect away from areas that should remain natural.
6. Unhide the “Sharpen eyes” layer and select its image thumbnail. Apply Filter > Other > High Pass. A radius of around 3.5–4.5 pixels was a useful starting point for my original images, but the correct value depends on resolution and output size.
7. Change the layer’s blend mode to Overlay or Soft Light. Add a black mask and paint white over the iris and other details you want to sharpen. Avoid sharpening the entire eye indiscriminately.
8. If either effect looks too strong, reduce the opacity of the relevant layer.
9. Select both layers and group them with Ctrl+G. Name the group “Eye effects” so that you can adjust or disable the treatment easily.

Technique 2: A quicker approach

1. Select the eyes with the Marquee tool, holding Shift to add to the selection. Copy the selection to a new layer with Ctrl+J and name it “Eyes”.
2. Brighten the layer using Brightness/Contrast, keeping in mind that you can reduce the opacity later.
3. Apply Smart Sharpen from the Filter > Sharpen menu. Use a restrained setting and inspect the result at 100 per cent magnification.
4. Add a black layer mask and paint white over the areas where you want the sharpening to appear. If the effect is too strong, reduce the layer opacity.

The most important thing is restraint. Eyes should look alive, not artificially bright or unnaturally sharp. The viewer should notice the person, not the editing.