A new cultivar of Hosta named \u2018Roy Klehm\u2019, a chemically induced chimeral mutation of Hosta \u2018Summer Serenade\u2019, that is characterized by its unique variegated foliage with bright yellow-green centers and wide deep green margins comprising about one half of the leaf area. A valve pin for opening and closing a mold gate is coupled to the coupling part to be movable with the actuated part. The at least one symbol stream is scaled using a weight vector to generate a plurality of scaled symbol streams. The switch controls the signal transmission path between the node and a ground terminal according to a clock signal. One method involves screening a patient for an ophthalmic lens using a pinhole screening device in the lens to increase the patient’s depth of focus.