2023-08-04 06:10:03
In the hot summer, water sports are inevitable. but you know what? If you play on the coast or in the sea where the sun is dazzling and sparkling, if you do not wear sunglasses, your eyes will be easily damaged by ultraviolet rays. So, how to choose sunglasses for water use, which are the most protective for the eyes? Let me share with you the following five points: 1️⃣ Polarized lenses are on the beach. In addition to direct sunlight, the light reflected by the white sandy beach and the sunlight reflected by the sea are both sources of light and are often overlooked. This is why it is best to wear sunglasses with “anti-polarization” when playing in the water at the beach. Polarized lenses can eliminate glare and let only part of the light pass through. Therefore, wearing sunglasses with polarized lenses can make our eyes more comfortable when we are engaged in water sports, and will not feel glare due to the above-mentioned reflected light. In general, most sunglasses advertised as water-friendly will have anti-glare, polarized lenses. As for how to test it? It’s very simple, just point the glasses (horizontally) at the computer screen, and the computer screen should be clear through the glasses. Then turn the glasses 90 degrees to show the angle of the frame up and down. At this time, when looking at the computer screen through the glasses, you will find that the screen becomes black and dark. This means that the glasses are equipped with polarized lenses. ▲Picture: Unsplash 2️⃣ Anti-UV Ultraviolet (UV) of sunlight refers to invisible light with a wavelength shorter than 400 nanometers, which can damage human eyes. When choosing sunglasses, choose a style with “UV 400”. Some glasses have such a small sticker directly on it, while others are attached to the product description. As long as you choose sunglasses with UV 400, basically all the invisible light that is harmful to the eyes can be filtered out. However, in addition to UV 400, light penetration and UV shielding are also key points. It is advisable to choose sunglasses with marked light transmittance and ultraviolet shielding rate. It should be noted that the higher the light penetration rate, the lower the ultraviolet shielding rate. If it is used for water sports, it is recommended that the ultraviolet shielding rate should reach more than 75%. 3️⃣ Cover design The glare on the water is omnipresent and will enter our eyes from all angles. If the glasses are flat, the light will enter from the side. It is recommended to choose curved lenses with a strong covering design, so as to ensure that the eyes are well protected. ▲Picture: ZIV official website 4️⃣ The buoyancy design plays in the water. If the sunglasses fall into the water, it will be difficult to get them back. Many sunglasses advertised as water have buoyancy design, that is, they will float on the surface of the water if they fall into the water, and will not sink to the bottom of the sea, which is convenient for users to find. Of course, if you want to ensure that the glasses do not slip off, you can use a glasses rope, or choose sunglasses with a headband design, which will be more foolproof. 5️⃣ Anti-salt erosion Our sweat and sea water contain salt, which will more or less erode the coating of sunglasses, so some sunglass brands launch products that advertise anti-salt erosion. When choosing water sunglasses, it is advisable to choose salt-resistant ones. However, salt-resistant sunglasses are still rare following all. The easiest way is to rinse them with clean water or a special cleaning solution for glasses following each use, and then gently dry them with a test cloth. Note, try not to use a wiper, because there may be fine dust on the mirror surface, and the wiper may scratch the coating. The safest way is to rub it with pressure. Cover photo／Crystal
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