Glass Eye 2000 is a program used for drawing and sizing stained glass windows. I totally love it and use it every time I make a stained glass window. You can take any picture, and then draw a pattern of that picture by uploading it onto your computer and setting it as a background on the Glass Eye program and finally you basically trace the image. It is also great for using pictures you find online and doing the same thing! And you can also scan a picture from a book or other print media to draw a pattern as well.
The program has a lot of glass samples to plug into the window to give you a better idea of what it will look like when completed. That makes it wonderful when working with customers who want to see a completed "sample" of their window before buying. When working in a studio setting, a customer can actually choose glass colors and textures, even glass manufacturers from which you can create a sample of their desired window before fabrication.
It is easy to re size the pattern to the exact dimension of the finished piece! It is important to either start with that dimension or create a shape that is close to the size needed so that when resizing, the pattern doesn't get distorted in any way. If the window is to have an arch or other shape, it is still possible to get the correct size by using the software correctly.
There are a few different versions of this program available. It is better to spend the extra money to get the best version possible!