Soft contact lenses designed to simulate the change in refraction optical pro-file from orthokeratology (OK) fail to slow axial eye elongation or change to refrac-tion over 1-year of wear in children, leading to suggestion that OK’s propensity to slow myopia progression may not be due to changes OK makes to optical profile.
This review covers how well axial length relates to refraction and predicting future myopia, how to measure axial length, its value in orthokeratology and atropine management, how axial length influences a treatment plan and can you practice myopia management without it.
You may be ready to cease treatment, or the patient has done so of their own accord. Then you observe that the rate of myopic progression accelerates again – a myopia rebound effect. When does this happen? Can you avoid it? What should you consider doing in practice?
This research showed that centre near design multifocal CL’s do not appear to reduce visual acuity at near in young accommodating myopes, but result in a slight reduction in visual acuity at distance.
This research investigated orthokeratology lenses designed for a higher peripheral ‘add’ power, and how these influenced corneal hysteresis (rigidity) and higher order aberrations.
Understanding how orthokeratology alters ocular aberrations helps to understand research and potential mechanisms of myopia control. Here we explain more.
When fitting orthokeratology for astigmatism, it is important to distinguish between refractive astigmatism and corneal toricity. Factors influencing the speed of response are also discussed.
MCS was hesitating fitting OrthoK to a patient who showed inferior corneal steepening. Her main concern was that OrthoK may induce corneal ecstasia/keratoconus in the future and whether there is a link between OrthoK and keratoconus.
Read a summary of Contact Lens Spectrum’s special edition on myopia, published in late 2019, and use the links to read the full version.
This case is not your typical astigmatic myope. There are several features to this patient that require careful consideration, including high myopia, amblyopia, myopia correction and control, and eye health management.
