Right click on the “LASIK flap” layer and choose Blending Options.


Use the polygon lasso tool to create a selection like shown in the image below. The selection edge should meet at the two corners where the LASIK flap and the LASIK flap cutout meets.

Select the “LASIK flap cutout layer” then click on the
button in the Layers palette to add a layer mask. Your LASIK flap should look like the image below.

Hold the Ctrl key and click on the “LASIK flap cutout” layer mask thumbnail . This will create a selection from the transparency of the “LASIK flap cutout” layer. Press Ctrl+I or choose Select > Inverse to inverse the selection. You should have a selection like the image below.

Select the “LASIK flap” layer then click on the
button to add a layer mask. Your LASIK flap should look like the image below.

Currently, the hinge on the LASIK flap looks too sharp as if it was folded like origami paper. We’ll smooth it out to create a more realistic LASIK flap hinge with more curvature. Select the layer mask of the “LASIK flap” layer. Make sure that you select the layer mask and not the layer itself. Chooes to Filter > Blur > Gaussian Blur. Adjust the Radius setting so that you get a thick translucent white line on the LASIK flap like the image below.

Now choose the layer mask of the “LASIK flap cutout” layer. Again, make sure that you’re selecting the layer mask and not the layer itself. We’ll use the same filter so go to Filter > Blur > Gaussian Blur. Pick a Radius setting that will just slightly blur the edge of the LASIK flap cutout.

Here’s the completed LASIK flap.
