The effect of interrupted defocus on blur adaptation.

Purpose: Blur adaptation occurs when an observer is exposed to continuous defocus. However, it is unclear whether adaptation requires constant defocus, or whether the effect can still be achieved when the adaptation period is interrupted by short periods of clear vision.

Methods: The study included 12 emmetropes and 12 myopes.

The time course of blur adaptation in emmetropes and myopes.

Purpose/background: This study examined the effect of myopic defocus on visual acuity (VA) over time, with attention being paid to the first point at which blur adaptation had a significant and measurable effect on defocused VA. Visual acuity was sampled at a higher rate than previous studies in order to assess the time course of blur adaptation processes in myopic and emmetropic observers.

Methods: Participants were 24 normally-sighted observers (12 emmetropes and 12 myopes, median age: 22.