Eighty-Five Percent of Improved Optical Power Delivery to Epiretinal Prostheses Using Rigid Body Compensation...

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Optics

Background:

• Degenerative retinal pathologies like age-related macular degeneration cause vision impairment.
• Current retinal implants require transscleral cables for power and data, increasing surgical risks and costs.
• A novel retinal implant design utilizes a photonic power converter (PPC) to receive power and data optically through the pupil, bypassing the need for cables.

Purpose of the Study:

• To develop and model a misalignment compensation algorithm for a novel retinal implant system.
• To assess the effectiveness of the algorithm in maintaining optical power delivery despite reflector misalignment.
• To improve the safety and efficacy of retinal implants for vision restoration.

Main Methods:

• Modeling a misalignment compensation algorithm accounting for rigid-body motions of the reflector.
• Applying corrections to micro-electromechanical mirror coordinates based on angular misalignment.
• Simulating optical power delivery to the implant under various axial reflector misalignments.

Main Results:

• The compensation algorithm effectively corrects for rigid-body motions and angular misalignments.
• Up to 85% of the nominal optical power can be delivered to the retinal implant.
• The system demonstrates robustness with axial reflector misalignments up to 30 degrees.

Conclusions:

• The developed misalignment compensation algorithm is crucial for the functional success of cable-less retinal implants.
• This technology has the potential to significantly reduce surgical risks and improve patient outcomes for vision restoration.
• Further development of photonic power converters and alignment systems could revolutionize treatment for retinal degenerative diseases.