The medical term cat’s ear refers to the small grip at the ends of the postoperative incision. When we remove a scar of a certain width, if we close it directly, there will inevitably be a lot of extra skin bulging out at both ends. In order to make this part of the skin flat, we have to extend the incision to remove this extra tissue. When the tip of the lengthening incision is less than thirty degrees, the incision will not have visible cat ears after suturing. However, lengthening the incision means a longer scar, which is something that neither scar patients nor doctors want to do. However, medicine is not perfect, and in some cases, there is no choice but to properly lengthen the incision after scar excision. However, as long as the repaired incision scar is not very obvious and there is a significant improvement over the original, this price is worth it. If the cat is not very large, the advanced photoelectric technology can now be repaired. However, if it is more serious, it will need to be repaired by another surgery, and the incision will then still be extended, maybe even more. Therefore, before the surgery, I will communicate with the scars according to the scar situation. In some cases, if you do not want to excessively prolong the incision, you can try to control the length of the incision if the remaining cataract can be removed by photoelectric treatment after the surgery, but sometimes it is necessary to prolong the surgical incision. Many scar patients may not understand the impact of catarrh on appearance and often ask the surgeon not to extend the incision, which can be very difficult for the surgeon because the specialist knows what the consequences can be. Therefore, it is important that all scar patients are well informed and prepared before the surgery so that they do not have to suffer for the sake of cat ears.