Traditional (Ultrasound) Cataract Surgery with Monofocal Lens Implant is used to treat the condition known as cataracts. In patients with cataracts, the lens of the eye becomes clouded, making it difficult for the patient to see. In cataract surgery, the doctor replaces the clouded lens with an artificial replacement. The surgery can be performed in many different manners. In one scenario, the doctor can use an ultrasonic probe to emulsify the lens, remove the fragments, and then insert the monofocal replacement. The monofocal lens can only let the patient see clearly at near, intermediate, or far distances, but not all.