While their size and shape vary with location in the nervous system, most neurones contain the same parts: a cell body; a number of highly-branched outgrowths of the cell body called dendrites; a single, long nerve fibre (or axon) extending from the cell body; and branches at the end of the nerve fibre (axon terminals).
My doctor said that usually happens when blood pressure is high and you get that strange head sensation. But as I was reading some documents on net, I found out that it could also be some sort of a panic attack. You could try next time it happens to relax, try thinking on some peaceful place, and just calm down.
The sensation that something is in the eye commonly brings people to the ophthalmologist. This is referred to as a foreign body sensation, as if a foreign object were scratching the eye. Usually this sensation originates from the cornea, which is the clear part of the eye through which we see. The cornea has a large number of nerve fibers that are normally covered by a lining. If this lining is breached, the sensation that something is in the eye results, whether or not anything is actually there. Any condition which can cause a scratch on the cornea can lead to this symptom.