Mean ( SD ) spherical equivalent refractions were as follows : zone I , -1.51 ( 3.42 ) diopters ( D ) in 52 eyes that received intravitreal bevacizumab and -8.44 ( 7.57 ) D in 35 eyes that received laser treatment ( P < .001 ) ; and zone II posterior , -0.58 ( 2.53 ) D in 58 eyes that received intravitreal bevacizumab and -5.83 ( 5.87 ) D in 66 eyes that received laser treatment ( P < .001 ) .