In situ reduced gold nanoparticles in PDMS contact lenses for color blindness management

Area of Science:

• Ophthalmology
• Materials Science
• Nanotechnology

Background:

• Color vision deficiency (color blindness) affects the ability to distinguish colors, with red-green being the most common form.
• Current management strategies involve color-filtering eyewear to adjust light wavelengths.
• There is no cure for color vision deficiency, necessitating assistive technologies.

Purpose of the Study:

• To develop and evaluate novel plasmonic contact lenses for managing red-green color blindness.
• To enhance color perception in individuals with deuteranopia and protanopia using targeted wavelength filtering.
• To present a facile method for creating stable, hydrophilic plasmonic contact lenses.

Main Methods:

• Gold nanoparticles were synthesized in situ onto contact lens material.
• The resulting plasmonic contact lenses were characterized for their absorption properties (peak at ~533 nm).
• Vision simulation through the lenses was performed, combined with the Ishihara test, to assess color perception enhancement.

Main Results:

• Plasmonic contact lenses effectively filtered specific wavelengths, significantly improving color perception for deuteranopia and protanopia.
• The developed lenses demonstrated stability and hydrophilicity, suitable for contact lens applications.
• The imaging and simulation approach accurately replicated the impact of color filtering on colorblind vision.

Conclusions:

• Stable, hydrophilic plasmonic contact lenses offer a promising wearable solution for managing red-green color blindness.
• This technology provides a significant enhancement in color perception for affected individuals.
• The study introduces an effective method for simulating and assessing the benefits of color-filtering interventions.