Varifocals are a type of eyeglasses that have two different types of lenses: one for distance vision and the other for near vision. Many people who wear varifocals find that they are more comfortable when working on a computer because the lenses are designed to be close to the eyes. However, there are some downsides to using varifocals while working on a computer. First of all, you may have to adjust your positioning constantly in order to keep the distance lens in front of your screen. Besides, if you’re working with text or large graphics, you may have difficulty reading them since they will appear blurry.