I'm working on a project that requires textured glass. I need to get some with a small geometric pattern.

I want to create glasses that make the world look distorted into geometric patterns, or make multiples of the same image when looked through. However, I need glass to do this. Any idea where I could get these?

Pic related, closest I've found to what I want. However, the squares are 1/2 inch in height, which is too big for glasses that are close to your face.