(1) Wide field of vision, due to the spherical design being more in line with ergonomic principles.
(2) The field of view is larger, and due to the protrusion of the spherical surface, the space between the lens and the human eye is greatly increased, which will bring several benefits. The air entering the large ventilation hole has sufficient circulation space, which will make it less prone to fogging. The spherical surface increases the distance between the lens and the human eye, and also prevents the vapor from the human eye from quickly encountering colder lenses, providing anti fog effect.
(3) The spherical lens design is closer to the shape of the human eye, so that when the eye rotates, the line of sight is perpendicular to the lens at any angle, reducing the possibility of parallax. The lens is far from the human eye and is less likely to touch the eyeball under accidental impact.
(4) Of course, in terms of aesthetic effect, spherical mirrors look cooler. The prominent focusing effect of spherical mirrors concentrates the surrounding scenery on the lens, and the lens effect of the scenery is presented on the lens. So, of course, when buying snow glasses, the first recommendation is spherical lenses, but spherical lenses are generally more expensive.
(5) Ski mirrors equipped with spherical mirrors have a wider field of view, usually with a thickness of 1.4mm, but the raised parts of the spherical mirror are prone to scratches. There are two thicknesses of cylindrical mirrors, one is 1.4mm and the other is 0.8mm. Lens with different thicknesses have different impact resistance. The minimum thickness requirement for the lenses of ski goggles internationally is 1.27mm