Dynamic Accommodation Responses in Subjects Wearing Myopia Control Spectacles Modifying Peripheral Refraction.

Purpose: Peripheral optics have been suggested to play a role in myopia progression, with accommodation responses also considered a potential contributor. This study aimed to investigate whether modifications in peripheral optics through different spectacle lenses affect accommodation responses. Methods: Dynamic accommodation responses were assessed using a double-pass instrument while switching the target from distance (3 m for 3 seconds) to near (0.22 m/4.5 D for adults, 0.18 m/5.5 D for children, 5 seconds) and then back to distance (3 m for 3 seconds). Three groups were studied. Group 1 included 13 adults (age = 28 ± 4.5 years). Participants wore one of three myopia control lenses (MiYOSMART [Hoya], Stellest [Essilor], or MyoCare [ZEISS]) randomly, along with their habitual glasses. The testing involved both central clear zones and peripheral side-vision zones, with habitual glasses served as reference. Group 2 underwent same procedure, but in children (age = 9.8 ± 1.7 years). Group 3 included 8 adults (age = 27.9 ± 5.3 years) wearing standard glasses partially excised with central holes (diameter = 12 mm). The lens refraction included plano, +3 D defocus, -3 D defocus, and -3 D oblique astigmatism. Results: The accommodative lag was less than 0.5 D for all eyes under near stimulation. No significant differences in the amplitude of accommodation responses were observed among the myopia control lenses or the partially excised glasses. Conclusions: No effect on accommodation responses was found in subjects wearing different types of myopia control lenses. This finding indicates that the induced changes in the ocular peripheral optics do not have an impact on accommodation.