Dear Mohit,
The entire thing is a simple process and gets over by 30-45 minutes. Unless u have a medical history of serious illnesses, u'd be thru w/out any hassle. Here's what they check:
Extract from the Medical Request letter of CHC:
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7. The Designated Medical Practitioner will arrange for the following tests:
- Large PA chest X-ray together with a radiologist's report for any person 11 yrs of age or older.
- Blood test (VDRL or similar test) for all applicants 5 yrs of age or older.
- A Urinalysis (sugar, protein, blood) for all applicants 5 yrs of age or older.
- HIV test for any person 15 yrs of age or older, children who have received blood or blood products, or have a known HIV mother, and all potential adoptees.
8. Additional tests may be required if a medical condition is identified. The Immigration Medical Services have provided guidelines to the examining physician, detailing medical situations/conditions which require additional tests. Allowing the examining physician to follow the guidelines at the initial appointment will expedite your application.
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Besides the above, there will also be an 'Eye Test'. It is just a long distance reading of the Vission Table.
Hope that helps.