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.
There are a variety of factors that can lead to burning and itching of the eyes. Eye irritation can develop as a result of environmental factors, allergies, underlying medical conditions, age or the use of medications. Common causes of burning and itching eyes may include environmental factors such as: 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.