How would you explain the appropriate technique to examine the ears

Paper details:

As an instructor, you are working with a nursing student in the second year of a 4-year nursing program. The student does not perform an ear exam correctly. How would you explain the appropriate technique to examine the ears? You are working the triage desk of the ED. A client presents with sudden loss of vision of the right eye after a head collision during a volleyball game. What would your assessment include? What could be initial problems and would they warrant emergent intervention?