This systematic review of 9 studies confirms that under-correction of myopia does not slow progression; rather, at least half of the studies have shown the myopia progression is accelerated. There was no benefit found in overcorrection, and the evidence for un-correction was equivocal. Clinically, this advocates for the full correction of myopia.
What amount of axial length growth be expected in myopes versus emmetropes, and how can you tell if your myopia control treatment is working? This important clinical reference provides all this information and more on axial growth in younger and older children, emmetropes and myopes, and even data on typical myopia stabilization.
Considering even emmetropic eyes elongate, what are the limits of myopia control efficacy? This novel analysis explores the absolute axial elongation of treated and untreated myopes in the MiSight 3-year clinical trial in comparison to previously published models of myopic and emmetropic eye growth. The results indicate a potential limit to the short-term percentage efficacy of myopia control treatments.
When setting myopia control expectations both at outset and follow up, it is important to compare the child’s observed myopia progression to ‘average’, and to then judge the expected outcomes of treatment. Bringing their lifestyle, motivations and abilities into consideration is also important. Here we explore how to use resources in practice to set expectations and gauge success along the way.
After the 3-year MiSight 1 day clinical trial, the control group children were switched to MiSight. A ‘virtual control group’ mathematical model, previously published, was utilized to demonstrate a continued myopia control effect across six years, plus effectiveness of treatment for children who commenced wear at age 11-15 years.
The BLINK study found that +2.50 Add centre-distance multifocal contact lenses (MFCLs) slowed myopia progression but the +1.50 Add didn’t. Further analysis indicates that increased peripheral defocus created by the +2.50 Add only accounted for around 15% of the myopia control effect, indicating other mechanisms are involved.