Orthokeratology may slow Myopia Progression

According to a new Japanese study, Orthokeratology may reduce myopic progression in children. Orthokeratology uses special contact lenses to temporarily treat myopia. Myopia, or short sightedness, progresses due to the increase in axial length (front to back) of the eye. These researchers studied how overnight wear affects this increase in children.

92 children were split into two groups, with one wearing overnight Ortho-K lenses and the other age-matched group wearing only glasses. The children were all eligible for Ortho-Keratology and were an average age of 12 at the start of the study. Over a two-year period, measurements of axial length were compared. At the beginning of the study, both groups were about -2.57 and their axial length was around 24.7mm. At the end of the study, the increase in mean axial length of the eyes in the glasses group was 0.61, which was significantly greater than the 0.39 found in the Ortho-K group.

The study concluded that overnight ortho-k slowed the progression of myopia by reducing the increase in axial length.

A full report of the study appears in this month’s issue of the journal Investigative Ophthalmology & Visual Science.