Who studied the human eye?

Is peeing a lot a sign of pregnancy? Is regulation of blood sugar level a function of the urinary system? How long is life expectancy with liver disease? How do you prevent the early pregnancy? Does sympathetic stimulation cause increase in blood glucose? Do std's cause fever? Should you take glucose tablets if your blood sugar is high? Which type of insurgent? What gland secretes a growth hormone which stimulates growth of bone and muscle? What does cut-eye Higgins look like? Is it safe for someone with celiac disease to eat soy? Can a pinched nerve be caused by working out? What causes a symmetrical rash of little raised bumps that are itchy in little patches on wrists arms knees and back of knees? What part of the body does Spina Bifida affect? What is the difference between hyperventilation and asthma? What is the correct order for the layers of epidermis from outermost to deep? In what countries is strep throat found in? What substances that are part of a persons hair nails skin muscles and blood vessels? Wolf-dogs breastfeeding period? Examples Durkheims idea that deviance can serve positive function?

Who studied the human eye?