标签： Eyeglass Lenses Online

The eye is a refractive system, when the eyes appear refractive error, that is, when there is farsightedness or myopia, Free Try On Glasses can be considered to improve vision. Glasses is a transparent refractive medium, which is divided into spherical lens, cylindrical lens and spherical lens. Convex lens is divided into convex lens and concave lens, convex Free Prescription Glasses lens is equivalent to farsightedness lens, can make parallel rays or scattered rays to a certain extent, after refraction to the center convergence. In hyperopia, the light is refracted in the back of the retina, so the convex lens can make the focus of the light move forward, just fall on the retina, and the object image can be clear.

A concave lens is a myopic Buy Lenses For Glasses. The refractive function of the concave lens is to make the parallel rays, or the scattered rays to a certain extent, disperse after passing through the concave lens. Myopia is because the parallel light after refractive refraction in front of the retina, through the refraction of a concave Eyeglass Lenses Online, the focus will move back to fall on the retina, that is, clear imaging.

If your eyes are red, take off your contact Eye Glass Cheap lenses first. As long as your eyes are red, photophobia, tears and other discomfort, take off your contact lenses immediately and take them with you to an ophthalmologist to see what’s wrong. The cornea of contact Online Eye Glasses Prescription lens family is usually fragile. Most people come to see a doctor when their eyesight is blurred. At this time, their eyesight has been damaged to a certain extent.

Regularly replace the storage box of contact Eyeglass Lenses Online, and wash and clean the storage box and the basket for placing High Index Lenses Meaning. In addition, scald with hot water, clean with neutral lotion and dry in the air every week; Change the storage box once every one to three months. Don’t put it in the bathroom, because it’s easy to get moldy in a humid environment.

With the improvement of living standards, we have higher requirements for the film layer of Womens Eyeglasses. Coating of lenses refers to the use of physical and chemical methods on the surface of lenses to coat single or multi-layer optical films of a certain thickness, so that the lenses get some new, excellent performance that is not originally available. So what’s the role of the lens membrane? Let’s talk about it.

The first type, anti ultraviolet film. This film layer is also known as anti UV film, suitable for the more intense sunlight in summer. The main function is to resist ultraviolet, infrared, electrical radiation and other harmful light to human body, reduce the damage to the eye. Especially in five small long vacation when the choice to travel friends, might as well buy a pair of Mens Eyeglasses with anti-ultraviolet film layer.

The second type, apical membrane. Top film also includes waterproof film, anti-fog film and other products. It is suitable for humid or foggy weather and industrial occasions. The feature is that the molecular particles and the gap between molecules in the film layer are relatively small, so it can increase the smoothness of the High Index Lenses Meaning surface and prevent harmful substances and impurities from being adsorbed on the lens.

Antireflection film. The improved light transmittance should be the first feeling generated by wearing antireflective Eyeglass Lenses Online, as if the field of vision is instantly widened. At the same time, it also has the effect of radiation resistance and fatigue resistance.