What should your eyes be level with when using DSE?

Is mouth part of the gastrointestinal tract? What is crushing syndrome caused by? What is the function of a swim bladder as found in a bony fish? How does knee transplants works? How many Cystic Fibrosis sufferers are there in wales? Purpose of test tube? What is the hormone secreted by ovary and adrenal cortex? Which statement best explains why the shape of teeth differs according to the diet of a species? What does the CEA level in the blood help the physician decide? What words rhymes with gluten? What blood types can receive type B blood? What glucose polymers cannot be digested by humans? How can I stop my child snoring? What is the shape of the human bladder? Can you develop a stutter? What causes cpk level to be high? When oxygen enters the respiratory system what is the next structure upon leaving the trachea? What foods flare up gout? What is another name for osteoarthritis? What is a hard on?