See clearly while snorkeling or diving with this single optical lens for the Deep Blue Gear Maui Jr. kid's mask, which can be used on the right or left side of the mask at the same correction level. Easy to install into the mask, this distance corrective optical lens helps you enjoy a fantastic view of the ocean floor. The correction is ground into the entire lens, requiring no stickers or attachments for installation. Deep Blue Gear offers a wide variety of correction levels, ranging from -10.00 to +4.50 in half increments.