Vision USA’s Task-Vision Large E-Z Clip On Computer Filters can be attached to any prescription eyeglasses or safety glasses to reduce eyestrain when working on a computer screen for lengthy periods of time. Their large lens will enhance true color perception, increase contract, and allow for sharper details. Task-Vision Large E-Z Clip On Computer Filters are a simple and extremely lightweight solution to the demands of computer work. Also available in magnification powers +1.00, +1.50, +2.00, +2.50, +3.00, +3.50, +4.00, +5.00.