Shake the mirror box gently, and pour the contact lens and care solution/preservation solution into the palm of your left hand. Then touch the contact lens with the index finger of your right hand, and finally it will be the following state, that is, the bottom of the contact lens is on the stomach of your index finger. People with astigmatism will have an optical axis, and vice versa. Optical axis is an important data of astigmatism. It is not clear whether the optical axis does not match the astigmatism. There is astigmatism, and customized contact lenses need to provide optical axis.
Contact lenses with medical device registration certificate must be selected, and the product package has product name, degree, radian, registration certificate number, manufacturer and other contents. Imported products must also have Chinese instructions and Chinese labels. As far as most people in China are concerned, the base arc is generally in the range of 8.4-8.6, so wearing contact lenses with this base arc value will be more comfortable. Of course, this is not absolute. The base arc of some people's eyeballs will be larger or smaller, depending on the situation.
Softness and hardness: it is not recommended to wear rgp for the first time. It's too difficult. Try the soft mirror first! Soft mirrors are also relatively soft and hard. If they are too hard and have obvious foreign bodies, I won't mention their names. The most common thing is that it is particularly hard and too soft. Due to the poor first-time wearing technique, it must be remembered that you can't wear it for too long at a time, which will easily lead to lack of oxygen and dryness in your eyes, and even lead to permanent damage to your eyes. It is best to soak in boiling water once a week.