The heater radiates infrared rays that can seriously damage your eyes.

The best protection method is of course to prevent your eyes from direct contact with infrared rays, or sit on its side out of sight, or simply turn your back to it to get warmth and avoid it. It hurts.

Non-luminous electric heaters also produce infrared rays, but they are far-infrared rays with a longer wavelength and are not harmful to human eyes;

The luminous electric heating equipment produces near-infrared rays. Infrared rays have shorter wavelengths. Infrared rays with wavelengths shorter than 3x1O-6m can hurt people.

Infants and young children are placed in a basin when taking a bath. Look up. If there is a bath heater on top, the child will I'm afraid my eyes are over now, and parents and children will suffer from it in the future...