To modify the light emitted by a screen monitor to the infrared spectrum, you would typically require a specialized filter. However, please note that attempting to modify the light spectrum of a screen monitor may void any warranties and could potentially damage the device. It is advisable to consult a professional or contact the manufacturer for guidance.
As for finding contact lenses or glasses that can convert infrared light back to the visible spectrum, such technology is not readily available for consumer use. Infrared light is outside the range of human vision, and there are no off-the-shelf products designed to convert it to visible light. While there are devices like night vision goggles that can detect and amplify infrared light, they use complex mechanisms beyond the scope of contact lenses or glasses.
If you have specific requirements or needs related to infrared light, it would be best to consult with an optometrist or an optical specialist who may be able to provide guidance or information on any available technologies or alternatives.