A sample of slow and fast progressors in prior 24 month orthokeratology clinical trials were found to have the same baseline refraction and axial length. The slow progressors were older, and showed 0.5mm smaller treatment zone diameters (TZDs), but no difference in induced peripheral myopic shift. There was also no direct correlation between TZD and axial elongation, indicating an intriguing but not yet defined relationship.
This study evaluates how orthok treatment zone diameter influences change in refraction and axial eye length over 1-year in children previously fit with orthok lenses of varying back optic zone diameter, to reveal that where treatment zone diameter was less than pupil diameter orthok’s myopia control efficacy appeared to be improved.
Prototype soft CLs designed to replicate the optical profile induced by OK were found to provide similar whole eye wavefront aberration measurements at distance and near fixation to existing OK lens wearers.
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 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.
Welcome to the final instalment of myopia content from the American Academy of Optometry 2019 meeting. These updates continue from Part 2, which detailed Mark Bullimore and Noel Brennan’s fantastic session entitled Twelve Evidence Based Things That We Should Know About Myopia.
Announcing Part 3 of 4 of exciting updates from the 2019 biannual International Myopia Conference! You’ll find links to parts 1, 2 and 4 at the end, however read on for updates on OrthoK, MYLO and MiSight!
Welcome to Part 2 of the ARVO 2019 Research Roundup! For article abstracts and more info, please click on the headings.
This is Part 3 on the Annual Association for Research in Vision and Ophthalmology 2019 (ARVO) conference summary.
