Benefit of spatial filtering for visual perception with a subretinal implant

Area of Science:

• Biomedical Engineering
• Ophthalmology
• Neuroscience

Background:

• Subretinal implants restore vision in hereditary retinal degenerations.
• Current implants offer basic visual perception but face limitations.
• Electric field interference causes blurred vision and limits visual acuity.

Purpose of the Study:

• To model the blurring effect in patients with subretinal implants.
• To propose highpass filters to compensate for visual degradation.
• To improve visual acuity and perception for implant users.

Main Methods:

• Analysis of visual perception parameters from alpha-IMS subretinal implant users.
• Development of a mathematical model for retinal blurring.
• Simulation and design of highpass spatial filters.

Main Results:

• A model accurately representing the blurring effect was established.
• Highpass filters were identified as a potential solution.
• Proposed filters aim to counteract the combined obscuring effects of the implant and retina.

Conclusions:

• Highpass spatial filtering can mitigate visual blurring caused by subretinal implants.
• This approach offers a pathway to enhance visual perception in patients.
• Further research can optimize filters for improved visual outcomes.