How to distinguish the front and back of contact lenses? Summary of precautions for novices to wear contact lenses
4hw.com.cn: glasses will become empty after a long time. Many nearsighted friends will choose contact lenses. For some people who just wear contact lenses, it is difficult to distinguish the front and back of contact lenses. Do you know how to distinguish them? Let's have a look.
Correctly distinguish the front and back of the lens:
(1) Observation method: the front is in a bowl shape and the back is in a disk shape. Those who wear the lens upside down will feel foreign bodies, and the lens slides indefinitely in the eye, which will also affect the visual clarity.
(2) Pinch method: gently flatten the middle of the lens with your thumb and index finger. If it is the front side, the lens should curl inward. If it is opened to the outside, it is the reverse side.
Wearing method of contact lens
1. Place the lens on the tip of the index finger, look at the mirror in front with both eyes, open the upper and lower eyelids with the middle finger of both hands to fully expose the cornea (black eye), attach the lens to the cornea, and then remove the index finger.
2. Move your eyes up, down, left and right. Flush out the air in the lens with tears. After the lens is completely attached to the cornea, slowly relax the upper and lower eyelids with your two fingers.
Preparation before wearing
1. Wash your hands with neutral soap and do not leave anything on your hands to avoid polluting the lenses.
2. The fingernails of the index finger and thumb must be cut and polished in advance to avoid damaging the eyes and lenses.
3. Determine and distinguish the lenses of the left eye and the right eye. They cannot be interchanged.
4. Wash the lens with full-function nursing solution and check whether the lens is damaged.