Spherical aberration is employed to create centre distance and centre near multifocal contact lenses. This blog explains how SA relates to myopia and accommodation, and puts this in view of MFCL research for myopia control.
Understanding spherical aberration is important in view of mechanisms of myopia development, progression and control. This blog explains positive and negative spherical aberration, how they relate to contact lens corrections and more.
Centre near design multifocal CL’s do not appear to reduce visual acuity at near in young accommodating myopes, however the results from this study suggest slight reduction in visual acuity at distance.
This study showed that adult high myopes with myopic macular degeneration (MMD) show reduced macular sensitivity as measured by microperimetry. That’s not unexpected; but the microperimetry changes occurred before BCVA changes in mild MMD – read more here.
This study showed that multifocal contact lens wear in young adult myopes increases accomodative lag, and utilized auditory biofeedback training to improve it. The results and implications are discussed here.