Twenty-nine neophyte subjects wore lotrafilcon A ( Dk , 140 ) , balafilcon A ( Dk , 91 ) , galyfilcon A ( Dk , 60 ) and senofilcon A ( Dk , 103 ) lenses in powers -3.00 , -10.00 and +6.00 D on separate nights , in random order , and on one eye only .