Air pollution is considered a reason for respiratory and cardiac problems. However, experts warn that it also increases the risk of eye infection and aggravates existing issues among those with ocular problems. Doctors hold fine particulates -- PM2.5 -- the main culprit for eye problems such as allergic conjunctivitis, scratches on the surface of the eyes, dryness, blurred vision, and increased sensitivity to light. "Every winter, my clinic sees a rise in the number of people complaining of red, itchy, watery, and burning eyes. The main reason is high air pollution, especially fine particles known as PM2.5," said Dr Ajay Sharma, co-founder of Eye Q Eye Hospital. PM2.5 includes tiny particulates from vehicle smoke, dust, burning waste, and firecrackers, he said, adding that these particles are so small that they easily enter the eyes and settle on the cornea, the clear front layer of the eye. Solid particles irritate and scratch the eye's surface, while liquid particles carry chemic