Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Cataract ?
    ### Response:
    Yes. There are two types of cataract surgery, phacoemulsification and extracapsular surgery. Your doctor can explain the differences and help determine which is better for you. With phacoemulsification, or phaco, a small incision is made on the side of the cornea, the clear, dome-shaped surface that covers the front of the eye.
    