METHODS	Twenty neophyte subjects wore a Lotrafilcon A ( Dk , 140 ; Ciba Vision , Duluth GA ) silicone hydrogel lens and an Etafilcon A ( Dk , 18 ; Acuvue ; Vistakon , Jacksonville , FL ) 58 % water content hydrogel lens of similar center thickness in random order in the right eye only , for overnight 8-hour periods .\