No, but it must be correctable to 20/20 vision. You are permitted to fly with corrective lenses.
Yes, in order to begin flight training at ERAU you must obtain a Class I or Class II medical certificate from a designated Aviation Medical Examiner (AME). Find AME listings on the FAA's AME Locator.
Yes, but you must contact the Civil Aerospace Medical Institute (CAMI) office at (405) 954-4821 and request a Signal Light Test. CAMI will set up an appointment for you to visit the nearest FAA Flight Standards District Office (FSDO).
Yes, see the FAA's AME Locator for AMEs listed by country.
When you decide to do your training at Embry-Riddle, we know that your goal is to become a Commercial Pilot. To be a Commercial Pilot, the FAA requires that you have a 1st or 2nd Class Medical. Embry-Riddle wants to ensure that you meet the requirements to be a commercial pilot before you begin any of your flight training.