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.
Itchy eyes are usually caused by allergies, which can be irritating. Itchiness can also be caused by pink eye, eye strain, or eye fatigue. If you are in a lot of pain or suspect an infection, see your doctor as soon as possible.
If (in addition to itching) your eyes are burning, the cause may be dry eye syndrome or meibomian gland dysfunction, not allergies. Similarly, if your eyelids are red and inflamed, you may have a condition called blepharitis, which is caused by bacteria and in some cases by microscopic mites that live on the eyelids.