Effect of a longpass filter on myopic defocus-induced changes in axial length and choroid thickness
Jinhua Bao
PurposeTo investigate the short-term effect of a longpass filter on myopic defocus-induced changes in axial length (AL) and choroidal thickness (ChT).MethodsThis study included 23 young myopic adults. AL and ChT were measured in both eyes before and after 60 min of +5 D myopic defocus induced in the right eye with either a longpass filter (>495 nm) or a neutral density (ND) filter of equal transmittance. The same ND filter was used for both the left eye and the control eye. The pupil diameter of