Patient's question:
What does occasional double eyelids in children indicate about a disease?Doctor's answer:
The double eyelid is controlled by the dominant gene, usually represented by A, while the gene controlling the recessive trait is represented by a. Since individuals inherit one gene from each parent at birth, there are three possible combinations: AA, Aa, and aa. When the gene controlling the dominant trait encounters the gene controlling the recessive trait, the dominant trait is expressed, resulting in double eyelids. However, due to the involvement of the recessive trait, the double eyelids may not be well-formed, which explains why single eyelids sometimes turn into double eyelids.Eye shape is inherited, and having large eyes is a dominant trait relative to having small eyes. For those with small eyes, this is undoubtedly good news—regardless of their own eye shape, if their partner has large eyes, there is a higher chance that their child will have large eyes.