discussion on the eye

Mr. Ally, a 25 year old graduate student, went to the eye doctor and complained about sudden flashes of light followed by dark areas in his vision. He had never noticed these before. He has always been healthy. There is no history of trauma or eye pain.

• What is the diagnosis?
• What are floaters?
• Explain the reason behind the dark areas in the visual field.
• How should the doctor treat Mr. Ally?
• answer all answers descriptively my professor is strict