How to divide contact lenses?

Contact lenses are roughly divided into two parts.

Contact lenses are divided into left and right parts. When we buy contact lenses, R on the glasses case stands for the right eye and L stands for the left eye. Therefore, comrades who wear contact lenses should form a good habit, whether they take off their glasses or put them on, first right and then left, because there are no words on contact lenses, which can easily lead to confusion.

So when we wear it, we wear our right eye first and then our left eye. When we take it off, we should also take the right eye first and then the left eye, and put it in the mirror box R of the right eye and the mirror box L of the left eye respectively, so that it is not easy to be confused. There are also a few contact lens manufacturers who may mark R and L on the lenses, which are the signs of left and right, so contact lenses distinguish between left and right.

Brief introduction of contact lenses

Contact lens, that is, soft contact lens, is a kind of lens directly worn on the corneal surface, which is used to correct ametropia, treat eye diseases, diagnose and meet professional and cosmetic needs. Because it is not easy to be found after wearing it, it is called contact lens.

Cornea and contact lenses are different from ordinary frame glasses. They are placed on the corneal surface and can move with the eye movement, but the movement does not affect the effect of corneal contact center. The gap between the back surface of contact lens and the front surface of cornea is filled with tears, which is called tear lens.

The refractive index of contact lens, tear lens and cornea is very close. Tears, corneas and contact lenses are considered as refractive media. The surface curvature of the newly formed refractive medium can be made at will, which can be used to correct ametropia, especially for people with high myopia, corneal astigmatism, anisometropia and aphakia.