Our computer bifocal reading glasses are Aspheric lens optical quality and range from +1.50 to +4.00. Aspheric lens designs reduce or eliminate distortions for a wider field of view and better peripheral vision. In conventional lens designs, a slight distortion is created when you look away from the center of the lens — whether your gaze is directed to the left or right, above or below. This will not happen with Aspheric lenses. With our wide selection of computer glasses, featuring a variety of power, color, style and sizes, you're sure to find what you need for yourself or for your patients.