In recent years, to keep up with the trend of the times, sunglasses have also made many changes in design, and lens color is one of them. In addition to the most basic black and gray, there are also colorful colors such as pink, yellow, and red on the eyeglass mart now.
But many people believe that to block ultraviolet rays, the darker the color, the better the effect of sunglasses near me. Is this the case? Firstly, we need to understand a word: transmittance.
Transmission ratio, also known as transmission coefficient, refers to the ratio of the light flux passing through a lens to the incident light flux. Simply put, it is the transmittance or transmittance of visible light.
The anti-UV ability and transmittance of lenses are closely related, and the lower the UV transmittance, the stronger the ability to block UV rays in front of them. That is to say, even transparent lenses, like sunglasses, can provide UV protection.
So, choosing sunglass near me is not necessarily the darker the color, the better. On the contrary, wearing lenses with excessively dark colors in unsuitable scenes can cause danger.
For example, when driving in summer, the sunlight is very strong, and many car owners will choose dark sunglasses to block out the sunlight. However, wearing dark sunglasses while driving can easily filter out light-colored objects, making it difficult to determine the size of the vehicle ahead and affecting the determination of the distance between vehicles.
In emergencies, dark sunglasses can delay the speed of image analysis by the optic nerve, leading to delayed reactions and greatly reducing the driver's sensitivity to surrounding conditions, causing them to make incorrect judgments and resulting in dangerous situations.
