*Normal axial progression is based on the following study: Zadnik K, Mutti DO, Mitchell GL, Jones LA, Burr D, Moeschberger ML. Normal eye growth in emmetropic schoolchildren. Optom Vis Sci. Nov 2004;81(11):819-28. doi:10.1097/01.opx.0000145028.53923.67
The study evaluating this specific intervention did not assess axial progression.