Later, circular needles were invented, which can also be used to knit in the round: the circular needle looks like two short knitting needles connected by a cable between them. Longer circular needles can be used to produce narrow tubes of knitting for socks, mittens, and other items using the Magic Loop technique.
Occasional burning and itching of the eyes is often the result of a foreign substance in the eye. Once the substance is removed, the burning and itching will subside and other symptoms will disappear relatively quickly. Sometimes these symptoms develop in response to temporary irritants such as cigarette smoke or dust.
Causes of watery eyes can include: 1  Dry Eye Syndrome. 2  Clogged tear ducts. 3  Conjunctivitis. 4  Environmental irritants such as chemicals, smog, hot wind, bright lights, blowing dust, and airborne allergens. 5  Blepharitis. 6  Abrasions. 7  Foreign bodies. 8  Allergies to mold, dust, and dander.