Everyone knows that the characteristics of single and double eyelids have been determined at the time of birth. This is because the two traits of double eyelid and single eyelid are determined by genes. . Double eyelid is a dominant gene, while single eyelid is a recessive gene. Some people have doubts about the single eyelid, why do they sometimes have double eyelid?
In fact, this situation is not uncommon. When a person with a single eyelid has double eyelid characteristics, it is not that the person ’s gene has been mutated because this gene is mutated. The probability is negligible. The characteristics of double eyelids appear when there is a tight connection between the muscles of the open eyes and the skin of the eyelid. If the tendons used to open the eyes are not closely connected with the fibers of the eyelid skin, the characteristics of a single eyelid will appear.
If you do n’t take enough rest everyday, you sleep incorrectly, you add too much water before going to bed, or if you damage the area around your eyes, it will cause open muscles and eyelids The tightness of the fibers between the skin changes, so that a single eyelid becomes a double eyelid or even a triple eyelid.
Normally, these kinds of single eyelid will become normal within a few days. If the eyelid does not return to its original state for a long time, you must pay more attention , Go to the hospital as soon as possible to do an examination to prevent the occurrence of eye diseases.