Monthly contact lenses toric lenses series cooper vision frequency quantity 3 pieces type of lens soft lenses manufacturer specific features cooper vision ultrasync technology material methafilcon a diopters 275 wearing time 1 month diameter 144 mm base curve 87 mgliche zylinder 0 75 1 25 1 75 2 25 mgliche achsen 10 180 oxygen permeability dk 16 water content 55 geeignet fr astigmatism