How to buy the good ski goggles?

Face the snow lens of full of beautiful things in eyes on market, and each modelling is distinctive, colour is bright-coloured, how to choose the ski goggles sale well for oneself? Let me show you: The larger the interior of the snow mirror, the less likely it is to fog. The reason why the snow mirror fogs is that the temperature inside the snow mirror is higher than the outside and the temperature difference is formed. The temperature of the snow mirror with narrow internal space rises quickly, which easily leads to the difference in temperature between inside and outside, and the fogging is easier. Simply put, the snow mirror protruding in front of the lens is less prone to fog. The outside lens of ski lens has sphere lens and cylinder lens 2 kinds. The shape of the surface of a spherical mirror is similar to that of a sphere, close to the shape of a human eyeball, effectively reducing parallax and expanding the field of vision. Because of the prominent mirror, the spherical mirror increases the internal human eye space and has enough circulation space to play a good anti-frost effect.