No, eating chillies does not cause blurred or impaired vision. There is no scientific evidence to support the idea that consuming chillies on a daily basis causes vision problems. In fact, chillies contain beneficial compounds such as vitamin C, capsaicin, and carotenoids, which can have positive effects on our health. However, it's always a good idea to consume a balanced diet, and not rely on just one food item, to get all the essential nutrients needed for good health. If you are experiencing changes in your vision, it is best to consult a doctor or an eye specialist to determine the cause. They can perform tests and provide a diagnosis and appropriate treatment, if necessary.