Femtosecond laser for cataract is better. Femtosecond laser for cataract is the latest generation of surgical procedure, the positioning of femtosecond laser is more accurate, the energy is smaller, when making cataract incision, the position is very accurate and the size of incision is appropriate. When tearing the capsule, manual capsule tearing tends to result in a large or small capsule, while the femtosecond laser creates a fixed and consistent capsule size. In addition, some cataract nuclei are hard, so if the nucleus is split by traditional ultrasound emulsification, the post-operative reaction will be very high after using high energy. For high-end crystals, such as astigmatism or multifocal crystals, very accurate positioning of the astigmatism is required and the size of the tearing capsule should be appropriate.