It is a simple yet important eye test that checks how well a person can distinguish between colors, especially red and green, and often decides eligibility for medical, engineering, and government careers in India. Know its types, how it's done, and when students should get a certified test.

India is a young country facing an old person's disease — and the numbers are alarming. Research published in JAMA Network Open found that high blood pressure among Indian youth is more than twice the rate seen in the United States for the same age group. Young professionals in Jodhpur, Jaipur, Delhi and across Rajasthan are increasingly walking into clinics with blood pressure readings that once were seen only in 60-year-olds.