What does extended depth of focus mean in contact lens designs?

Extended depth of focus (EDOF) designs in soft contact lenses are employed for presbyopia correction as well as myopia control. This article explores differences between contact lens designs which could be termed ‘multifocal’, and how this could factor into clinical outcomes.

Blur adaptation in children wearing orthokeratology

After 1 month of wearing orthokeratology lenses, children were shown to have reduced accommodative lag and increased blur sensitivity, leading to the suggestion that blur adaptation is conducive in achieving good visual acuities and visual function in ortho-k wear.

The importance of myopia control soft contact lens design

Increasing power in a myopia control treatment zone of a multifocal soft contact lens can increase myopia control efficacy but negatively impact vision. This study is the first optical characterization of a novel design to improve this relationship between treatment zone power and vision quality.

Why MiSight 1 day is not a multifocal contact lens

MiSight 1 day is a dual focus contact lens – it’s not a multifocal as it does not provide an ‘add’ at near. When considering a first correction for a young myope, how should we prioritize both myopia correction and control? Read more in this case.

Multifocal contact lenses and higher order aberrations – a potential myopia control mechanism?

Total spherical-like higher-order aberrations (HOA) increased by more than double in the distance-centred +2.50 Add compared to +1.50 Add, with total coma-like HOA increasing further. Since orthokeratology studies have reported an association between more change in HOAs and better myopia control efficacy, this could indicate a mechanism of action in multifocal contact lens myopia control.

Multifocal contact lenses don’t influence peripheral vision detection in young adults

Young adults fit with CooperVision Proclear multifocal contact lenses showed no loss of peripheral vision detection ability compared to single vision contact lenses. The near add was chosen to generate +0.50 or +1.00 of peripheral blur, confirmed by peripheral refraction measurement. This is a positive indication that fitting MFCLs in young wearers doesn’t impact peripheral visual performance.