Wearing a tightly-knotted tie may
help a man look smart but it can increase the risk of serious eye disease, warned
doctors.
They say a tie that fits too tightly
around the neck - or a fat neck itself - can cause the eyes to bulge by putting
pressure on the main neck vein.
This, in turn, may raise the
internal pressure of the eye, one of the causes of glaucoma, a sight-
threatening disorder affecting thousands of Britons.
The small study in New York measured
the pressure of the fluid in the eyeball in a small group of men before and
after they attached their tie.
They found a significant rise - and
warn that long-term pressure rises have been linked to the condition glaucoma.
Researchers from the New York Eye
and Ear Infirmary in New York tested 40 men, half of whom were healthy, and
half of whom had already been diagnosed with glaucoma.
Their "intraocular
pressure" was measured, then they were asked to put on a "slightly
uncomfortable" tie for three minutes.
They were tested again, and 60% of
the glaucoma patients, and 70% of the healthy men were found to have
significant rises in pressure. As soon as the ties were removed, the pressure
fell again.
What is Glaucoma? Glaucoma is a
chronic condition where the pressure in the eyeball increases, eventually
damaging the optic nerve and causing loss of vision because it is difficult for
fluid in the eye to drain away.
At first only the extreme edges of
the field of vision are affected, but if left untreated the condition can cause
blindness.
Vein squeeze -The experts say that
the ties are probably causing the problem because they are constricting the
jugular vein, the main blood vessel returning blood from the head towards the
heart.
They add that such rises in pressure
could also lead to normal, healthy patients being diagnosed as at risk of
glaucoma by mistake.
Dr Robert Ritch, a glaucoma
specialist, said that men who wore a tight necktie daily could cause a
sustained increase in internal eye blood pressure and 'push up' the risk of
glaucoma.
Another problem was that wearing a tight
tie might give a falsely high reading of eye blood pressure during routine
checks, possibly resulting in an incorrect diagnosis.
The study team claims a tight tie,
particularly when worn by those with fat necks, constricts the jugular vein
which raises venous pressure followed by pressure within the eye.





