Power Profiles of Different Myopia Control Soft Contact Lenses

Abstract

Objectives: The aim of this study is to characterize the power profile of different soft contact lens designs for myopia control and assess the stability of their power parameters.

Methods: Eight different soft contact lens designs for myopia control were studied using the NIMO TR1504. A total of 96 contact lenses were measured, ranging from -0.50 D to -6.00 D in 0.50 D steps. Each power and design were measured three times.

Results: One dual focus, two extended depth of focus (EDOF), and five gradient multifocal (MF) designs were identified. The dual focus design had an optical zone diameter (OZ) of 3.23±0.07 mm and an addition of 1.99±0.30 D. The two EDOF designs had OZs of 0.93±0.38 mm and 2.21±0.11 mm, being the smallest among the eight designs. Finally, the MF designs showed the highest OZ of 3.64±0.06 mm and additions ranging from 0.69±0.14 D to 8.49±2.61 D.

Conclusions: These designs differ in characteristics such as OZ and addition. In some designs, the addition power or OZ may be influenced by the lens power. The EDOF and one MF design demonstrated the greatest stability. Further studies are needed to determine the optimal OZ and addition for myopia control.