Transition lenses are the ideal hybrid between optical lenses and solid tinted lenses. This type of lens darkens in the sunlight and then adjusts to a lighter colour, close to transparent, when indoors. As this type of lens essentially means you are wearing both optical and sunglasses at once, they protect your eyes from UV rays all day long. These lenses are a cost-effective and convenient way of getting a two-for-one out of your glasses, as they save you from changing out your glasses throughout the day, and they are ideal for tasks like driving where you are going between different levels of sunlight.