Do myopia control spectacle lenses with defocus incorporated multiple segments technology alter visual parameters and...

Area of Science:

• Ophthalmology
• Optometry
• Neuroscience

Background:

• Myopia control strategies are crucial for preventing high myopia and associated ocular complications.
• Defocus Incorporated Multiple Segments (DIMS) lenses are a novel approach to myopia management.
• Evaluating visual performance and cortical processing is essential to understand the impact of DIMS lenses.

Purpose of the Study:

• To assess visual parameters and cortical activity in myopic adults wearing DIMS lenses (MiYOSMART) versus single vision lenses (SVL).
• To determine if DIMS lenses cause any adverse visual or neurological effects.

Main Methods:

• Adult myopes (20-30 years) underwent testing with SVL and MiYOSMART lenses after a 2-week adaptation period.
• Visual parameters included high- and low-contrast visual acuity, contrast sensitivity, heterophoria, NPC, stereopsis, and accommodative facility/response.
• Cortical responses were measured using visual evoked potentials (VEPs).

Main Results:

• MiYOSMART lenses showed slightly better high-contrast visual acuity and a larger accommodative response compared to SVL.
• No significant differences were found in low-contrast visual acuity, heterophoria, NPC, stereopsis, or contrast sensitivity.
• VEP latencies and amplitudes did not differ significantly between the lens types.

Conclusions:

• No clinically significant differences in visual parameters or VEPs were observed between DIMS and SVL lenses.
• These findings support the safety of DIMS lenses for myopia control.
• The study confirms the absence of adverse visual effects associated with DIMS lens wear.