Vision with spatial light modulator simulating multifocal contact lenses in an adaptive optics system

Area of Science:

• Ophthalmic Optics
• Visual Simulation Technology

Background:

• Multifocal contact lenses (MCLs) offer presbyopic correction but require accurate patient visualization pre-treatment.
• Existing visual simulators need validation for replicating MCL optical performance.

Purpose of the Study:

• To map and validate center-near aspheric MCLs using a spatial light modulator (SLM) as a visual simulator.
• To compare through-focus visual acuity (TFVA) between simulated and real MCLs.

Main Methods:

• Commercially available MCLs (low, medium, high additions) were mapped onto an SLM.
• TFVA was measured in subjects using both the SLM and real MCLs on-eye.
• Correlation and Bland-Altman analyses were performed to assess similarity and agreement.

Main Results:

• Statistically significant shape similarity was found between TFVA curves from simulated and real MCLs.
• Bland-Altman analysis showed minimal differences (±0.01 to ±0.06 logMAR) within confidence intervals.
• Simulated MCLs demonstrated a ~20% superior visual performance compared to real MCLs.

Conclusions:

• SLM technology accurately captures the optical profile of center-near MCLs.
• The SLM effectively reproduces visual performance experienced with real MCLs.
• MCL optical profiles and their interaction with ocular optics are primary drivers of visual performance, not fitting aspects.