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 Dry Eyes. 1  Any disruption in the tear production process. 2  Blepharitis with inflammed eyelids can cause dry itchy eye symptoms.  Computer Users tend to blink much less frequently (about 3-4 times per minute verses the normal about 10-15 times per minute).