This instructable describes every step involved in duplicating your existing prescription frames or sunglasses into a wooden dovetailed frame. If you are making prescription frames care must be taken to ensure that the geometry remains the same.
This project started because I was sick of the hinges failing on my glasses, so I decided to make a pair that didn't include hinges. Since I'm a cabinetmaker, dovetails seemed to be the most obvious choice. The photos in this tutorial are from several different pairs I've made. I've been wearing mine for many months now and they're the lightest, most comfortable glasses I've ever had, and because of the laminated construction, they've proven to be very durable. Let's get started!
The first step in the making of wooden frames is to create a form in which you can produce the bent lamination needed for the front of the frames. If you look at your glasses, you'll see that they are curved lengthwise. This curve may or may not be even, so on a block of wood larger then the frames, I sketch the curve lightly while holding the frames in place. Make sure to draw a centre line to keep things straight, then use a french curve or a large compass to make a clean cut line. Cut out the curve in one pass on a bandsaw, then sand it lightly to remove any burrs or humps. A slightly rough surface here doesn't matter because this form is only for creating the shape. Cover both surfaces of the curve with packing tape so that glue will not stick to it, and you're ready to laminate.