In summer, ultraviolet rays are strong, which not only harms the skin, but also affects the health of the eyes and accelerates the aging of the eyes. Therefore, when we are going out in summer, you should wear sunglasses to block the strong light and reduce the irritation and damage to the eyes. How to choose sunglasses in summer?
1. Choose the lens color
The lens color of sunglasses is preferably gray-green or gray, which can uniformly reduce the chromaticity of various colors in the light and retain the primary color of the image. The surface temperature of the spectacle lenses should not be too high, otherwise it will be tightly attached to the face, which will cause dizziness or fogging of the lenses.
2. Choose the ones produced by regular manufacturers
You must choose sunglasses produced by regular manufacturers to see if there are scratches, impurities and bubbles on the surface of the sunglasses. However, try to choose dark-colored lenses when outdoors with strong sunlight, and choose light-colored lenses when driving, such as dark gray, dark brown or brown.
3. The lens should be flat
Hold the sunglasses in your hand at the fluorescent light and let the mirror strip roll smoothly. If the sunlight reflected by the mirror is distorted or wavy, it means that the lens is not flat, and this type of lens will cause damage to the eyes.
Who is not suitable for wearing sunglasses in summer?
1. Glaucoma patients
Glaucoma patients can not wear sunglasses in summer, especially angle-closure glaucoma. If you wear sunglasses, the visible light in the eye will be reduced, the pupil will naturally dilate, the iris root will thicken, the angle of the chamber will be narrowed or closed, the aqueous humor circulation will be aggravated, and the intraocular pressure will increase. This can affect vision, narrow the field of vision, and easily lead to acute glaucoma attacks, which can cause red, swollen and painful eyes with decreased vision, nausea, vomiting, and headaches.
2. Children under 6 years old
The visual function of children under 6 years old has not been fully developed, and the visual function has not developed to a normal level. Often wearing sunglasses, dark environment vision may blur retinal images, affect children’s visual development, and even lead to amblyopia.
3. Color blind patients
Most color-blind patients lack the ability to distinguish multiple colors. After wearing sunglasses, the ability to distinguish colors is bound to decline, affecting vision and even causing vision loss.
4. Patients with night blindness
Night blindness is generally caused by the lack of vitamin A in the body, and vision will be affected to a certain extent in dim light, but sunglasses will weaken the light filtering ability and cause vision loss.
Kind tips
According to your actual situation to see if you are suitable for wearing sunglasses, good quality sunglasses must have two conditions, one is to prevent ultraviolet rays, and the other is to block strong light. It is necessary to choose sunglasses with anti-ultraviolet signs to avoid unnecessary damage.
Post time: Jun-24-2022