Gradal® Top For intermediate and short-range focus difficulty associated with aging, there's no better choice than Gradal® Top premium progressives which provide perfect vision all day long, indoors and out. Your patients will enjoy comfortable, natural vision from the outset with no adaptation delays or conspicuous rocking or swimming effects. Choose from a huge variety of high-tech materials, including the super-light and slim 1.67 Super Hi-Index plastic.