The exact mechanics will depend on whether you want one eye, or the view of both eyes. However, other than the mechanics, it should be similar. I would create the image, that will be used as a matte, in Photoshop, or PSElements, and create slits (for the eyes). In my examply, I created a 2000 x 1500 pixel New Image, with a Transparent Background. Then I added a Solid Color Adjustment Layer, making that black. I created two ellipses, for the "squinted eyes," and just did a Delete, to knock the Solid Color Adjustment Layer to Transparent. The exact size, degree of ellipse and placement will be up to you. I Saved_As PSD, to maintain the Transparency. I then Imported the PSD, and dragged it to the Video Track above my Video - in my case, Video Track 2. Now the fun begins. You will Keyframe the Fixed Effect>Motion>Scale (but uncheck Constrain Proportions, so that you can adjust Scale>Height and Scale>Width independently). Decrease the Scale>Height, at the first Keyframe, to a tight squint. This is why I started with a Still Image, larger than the Frame Size of my Project and my Video. Here, I added a Dip-to-Black Transition, to start with black, then fade into the squint. As time progresses, I added Keyframes for Scale>Height, and at a point, also added Scale>Width Keyframes, adjusting that up, as well. When I had the "look" that I wanted, I went back and added Effect>Gaussian Blur to the PSD, and kept its setting pretty low, to soften the edges of the eyes.Experiment, experiment. If you need to work with two versions of the PSD, you can create them the same way, perhaps starting with even tighter ellipses, for PSD_01, then taller ones for PSD_02 (and maybe 03, etc., then just put a Cross-Dissolve between those. Note: you will want to Keyframe the "next" PSD to be close to the preceeding one.

Here is a look at the PSD:

Good luck, and hope that helps,

Hunt

For a look at a quick version of this, see: http://www.youtube.com/watch?v=JLeG7grDmUM

Hunt