Light Sensitive Lenses 

If you're sensitive to bright light or don't want to switch between spectacles and sunglasses, then photochromatic lenses are an option to consider. These darken according to the amount of sunlight, so you can enjoy comfortable vision both indoors and outside.  The latest generation of fast changing photochromatic lenses are made of lightweight plastic and can be fitted to a wide selection of fashionable frames.

They do not go as dark as sunglasses but help if you are sensitive to light.