Myopia Control Trial with Progressive Addition Lenses in Japanese Schoolchildren: Baseline Measures of Refraction, Accommodation, and Heterophoria

Abstract

The measurements reported herein will serve as a basis for assessing changes that occur over a 3-year follow-up period. Compared with the baseline measurements in the Correction of Myopia Evaluation Trial, clear differences were observed in the mean cycloplegic autorefraction and distance prescriptions. The accommodation and heterophoria data showed characteristics similar to those recently reported in myopic children abroad.

Design, methodology, and baseline data of the Personalized Addition Lenses Clinical Trial (PACT)

“…In a school-based cohort study conducted in China, [39] myopia was reported to be, on average,-1.43 D and -2.58 D in 7- and 14-year-old Chinese children, respectively. Similar to a study by Hasebe et al in Japanese school children, [40] no significant correlation was found between refraction and age in our study.…”

Axial Length Measurement Using Partial Coherence Interferometry in Myopic Children: Repeatability of the Measurement and Comparison with Refractive Components

“…This trial had been approved by the ethics panel of Okayama University in May 2002, and was carried out at Okayama University Hospital between 1 July 2002 and 30 July 2006. 20 The subjects had myopic refractive errors but no other ophthalmological disease. In conformity with the Helsinki Declaration, an adequate explanation of the study aim and methods was given to the children and their parents, who gave their written consent before the study.…”

“…Twenty-fi ve minutes after the second application, autorefraction and keratometry were performed with an ARK-2000 autorefractor/keratometer (Nidek, Gamagori, Japan). 20 The mean of fi ve readings was used as the representative measurement. All measurements were performed by a single ophthalmologist.…”

Seasonal variation in myopia progression and axial elongation: an evaluation of Japanese children participating in a myopia control trial

“…In this study, using the data from a clinical trial that evaluates the treatment effects of progressive addition lenses (PALs) in myopia control, we tried to clarify the seasonal variations in Japanese children and compared the results with those reported in the US and China [4,5].…”