About 6 million people in India's capital city are living with several vision problems, such as poor distance vision or near vision, according to a recent study by doctors at All India Institute of Medical Sciences (AIIMS), New Delhi. The study, Dr. Rajendra Prasad Centre for Ophthalmic Sciences at AIIMS, and submitted to the World Health Organization (WHO), also flagged major gaps in eye care services in Delhi, the Times of India reported. An estimated one-third of the population in the national capital was identified with refractive errors or presbyopia -- conditions that can usually be corrected with a pair of glasses. Globally, 826 million people suffer from presbyopia.About 70 percent of older adults in the capital city were identified with the problem. Alarmingly, about 13.1 percent school-going children had refractive errors, Dr. Praveen Vashist, professor and head of community ophthalmology at AIIMS, was quoted as saying. Gaps In Eye Care The study showed a lack of access to vision correction. While just 60 percent of people needing distance vision correction could access care, those with near vision correction could access care in over 47 percent of cases. Further, the doctors found:women had the lowest access to spectacles compared to menlack of trained eye care workers, the affordability of spectacles, limited outreach to vulnerable groups -- elderly patients, rural women, and economically weaker populations.The World Health Organization (WHO) recommends at least one optometrist for every 50,000 people. But Dr. Vashisth noted that Delhi currently has only 1,085 ophthalmologists and approximately 489 optometrists. Further, only 50 community-level vision centers, out of the has 249 eye care institutions in the city were found to be functioning. Moreover, only about 25 percent of children were receiving free spectacles through public health initiatives.Global Eye BurdenAccording to the World Health Organization (WHO), at least 2.2 billion people worldwide have near or distance vision impairment. Of these, at least 1 billion cases could be prevented with increased access to eyeglasses and cataract surgeries The WHO identifies refractive errors and cataracts as the leading causes of vision impairment and blindness. Vision loss can affect people of all ages; however, most people with vision impairment and blindness are over the age of 50.Here's how to maintain a healthy vision:Eat fruits and veggies, especially leafy greens like spinach, kale, and fish like salmon and tuna, to protect your sight.Be physically active, as being overweight or obese can increase risk for diabetes and other conditions that can lead to vision problems.If your vision gets blurry, use glasses to help you see better.Always wash your hands before putting them close to your eyes, especially if you’re putting in or taking out contact lenses. Use protective eyewear while playing a favorite sport or mowing the lawnWear your shades to prevent the sun’s rays from hurting your eyes. Give your eyes a break with the 20-20-20 rule: Every 20 minutes, look about 20 feet away for 20 seconds.Quit smoking as it can put you at risk of serious eye issues, leading to blindness.