Wear short-sighted glasses and watch street lamps at night. Why are all lights with colored apertures?

Why do you wear myopia glasses at night to see that street lamps have color apertures?

Myopia glasses are an optical tool to correct myopia. By changing the refraction angle of light, myopic eyes can see distant objects clearly. The phenomenon of color aperture when myopia glasses look at street lamps at night is mainly caused by the dispersion effect of light and the mismatch of eye diopter.

First of all, the dispersion effect of light means that when light passes through a transparent medium, light with different wavelengths will be refracted due to different refractive indexes. At night, the light emitted by street lamps and car lamps is mainly white light, which contains light of various wavelengths. When these rays pass through myopia glasses, due to the shape and material of the lenses of myopia glasses, the rays of different wavelengths will be refracted at different angles, thus forming a color aperture.

Secondly, the diopter mismatch of the eyes is also one of the reasons for the color aperture. The diopter of myopia glasses is designed according to the diopter of the eyes, which can adjust the focus of light on the retina. However, because the diopter of myopia is not completely matched with the diopter of myopia glasses, the light may be defocused after passing through myopia glasses, thus forming a color diaphragm.

In addition, the lens quality and manufacturing technology of myopia glasses will also have an impact on the appearance of the color aperture. If the lens quality of myopia glasses is poor or the manufacturing process is not fine, there may be some tiny defects or uneven thickness on the lens surface, which will also lead to light scattering and dispersion effects, and then produce color aperture.

To sum up, the main reasons for the color aperture of street lamps for night myopia glasses are the dispersion effect of light and the mismatch of eye diopter. In addition, the lens quality and manufacturing technology of myopia glasses will also have an impact on the appearance of the color aperture. If you feel uncomfortable with the color aperture, it is recommended to seek medical advice in time and seek the help of an ophthalmologist.