Do you know which is the most sensitive part in your body? It is the eyes, because there are many pain receptors, finely tuned nerve endings, which are located in and around them. Therefore, if you have noticed, a blast of cold air, inward growing eye lashes, dry air, etc. all trigger pain and/or irritation. Among the factors within the body, the sinus can also trigger eye pain. In some cases, simply rolling the eyes can cause an immense amount of pain, as the adjacent muscles are strained.