Contact lenses are also prescription glasses, with degrees, and the way of wearing them is in direct contact with the eyeball, including but not limited to material composition, water content and patterns, which are very particular. And because contact lenses are tears that stick to the surface of the eye, they naturally follow the movement of the eye. Since the contact lens is closer to the retina, it is necessary to take into account the difference between the contact lens and the glasses that are usually worn in the matching of the degree. In addition, the different patterns and colors can easily cover the original color and shape of our eyeballs.

In terms of material, the materials of contact lenses include rigid, semi-rigid and soft, and use hydrogel or silicone hydrogel materials with hydrophilic groups. Generally, the pigment is placed in the middle and does not directly touch the cornea or eyelid. There are also many types of contact lenses. In order to meet different purposes and forms of use, there are daily, weekly and monthly disposables in the replacement cycle, and there are also contact lenses with scattered light and contact lenses with myopia. There are also different shapes to correct different vision problems. Toric contact lenses, which are thicker at the bottom, are used to correct vision problems with astigmatism. Spherical contact lenses, which are the same thickness, are used to correct nearsightedness and farsightedness. Others include monovision, multifocal, and bifocals, among others.

In the pattern and color, there are aqua blue, color contact lenses, color films, art films and color blind films. Among them, aqua blue lenses, color lenses and daily color lenses can be seen everywhere, and they are also the types of lenses that are used more daily. Art films and colorblind films are suitable for places with different needs and people with red-green color blindness, and are relatively rare in life.

When choosing contact lenses, it is necessary to consider water content, lens diameter, lens center thickness, base arc and replacement cycle from the perspective of wearing comfort. Daily attention must be paid to eye hygiene.

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