Myopia Progression in School Aged Children and Adolescence in Israel – A Clinical Practice Based Study
Chaim Stolovitch; Arie Leshno; Daphna Mezad-Koursh; Moshe Leshno
Introduction: Myopia is the most common ocular disorder and its prevalence has risen significantly during the last two decades reaching epidemic proportions. Several studies were conducted with variable results on progression rate. One of the limitations in all studies is insufficient follow-up time, with only few studies who observed subject for more than two years, and a relatively small sample size. We aimed to evaluate the natural myopia progression rate observed among subjects treated at a pediatric ophthalmologist clinic in Israel.
Methods: Retrospective collection of refractive measurements taken at a single clinic. Subjects aged 5-15 who had at least 3 consecutive annual measurements were included. Myopia yearly progression rate was determined using Generalized Estimating Equations (GEE) model.
Results: Out of 56,869 subjects treated at the clinic 2,235 met the inclusion criteria with a mean of 5.7±2.9 visits over a period of 6.0±3.6 years (22,856 visits total). In the general population the yearly rate of progression was -0.12±0.11 diopter. The progression rate was higher among children who developed mild-moderate myopia (-0.19±0.03) and over thrice among children who reached high myopia (-0.39±0.04).
Discussion: We present clinical practice data regarding refractive changes among children and adolescence collected for a period of over 15 years. The observed myopia progression rate was substantially lower than previously reported. however they are unique in both sample size and duration of follow-up.
Conclusion: 1) Myopic progression in Israeli population is much lower than in the East.
2) Consequently procedures taken to retard myopic progression might be unnecessary.
References: Saw SM, Katz J, Schein OD, et al. Epidemiology of myopia. Epidemiol Rev. 1996;18(2):175-87.