Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Homocystinuria ?
    ### Response:
    Homocystinuria is an inherited disorder in which the body is unable to process certain building blocks of proteins (amino acids) properly. The most common form, called cystathionine beta-synthase deficiency, is characterized by dislocation of the lens in the eye, an increased risk of abnormal blood clots, skeletal abnormalities, and sometimes problems with development and learning.
    