How to identify the front and back of contact lenses?_contact lenses_
People who wear contact lenses for the first time will have a serious question, do they have front and back sides? Although a contact lens is just a tiny lens, a transparent solid color glass, it is necessary to identify which is the front side or which is the back side during the wearing process, so as not to Wearing it upside down will cause eye discomfort and a tingling sensation. So how to identify the front and back of contact lenses, let's take a look at the following editor. The simpler way to identify the front and back of the contact lens is to soak the contact lens in the care solution and observe the surface of the lens. If the technical front can be floated, it is the back of the contact lens. Either use tweezers for glasses and place it on the fingertip of the index finger to observe, keeping the eyes parallel to the surface of the lens, and then observe the two sides of the lens, which is bowl-shaped or concave inward is the front side. The opposite is the aspect. Under normal circumstances, these two small methods are simpler, more direct, and clearer to identify the front and back of contact lenses. If the front and back of the contact lens are judged incorrectly, it will cause eye pain during the wearing process and may cause damage to the cornea. Therefore, for patients who wear contact lenses for the first time, in order to better protect the health of the eyes and vision, it is more important to identify the front and back of the contact lens. Under normal circumstances, there are three ways to identify the front and back of a contact lens: The first appearance method is to place the lens on the index finger as mentioned above, and the round with the edge of the bowl is the front. The second squeeze method is to squeeze the lens between the index finger and the thumb. If it is frontally, it will close inward and have better elasticity. The third method of pushing is to put the lens in the care solution and use the lens clip to push the lens to appear in a suspended state. If it is easier to push, it is the front.