There are two kinds of medical exams:
Class II Medical Assessment: This certificate is prerequisite It is a medical requirement specified by DGCA for students who wish to pursue Pilot training courses. There are examinations for Physical, mental, visual and hearing requirements. This is taken by a DGCA certified physician.
Class I Medical Assessment: Anyone wishing to train for a commercial or airline transport pilot's licence will need to obtain an initial Class 1 medical certificate as part of the licensing requirements. This test is country-specific. Each country has certified physicians/centres in India to conduct Class I Medical Assessment before flying to that country to pursue Pilot Training.