A study in the German medical department showed that ties tied tightly to the neck and the Adam's apple could cause glaucoma.
The researchers ' tests of 40 male citizens showed that most people had a 20% increase in intraocular pressure 3 minutes after tying the tie. Tie compression neck vein, affect blood circulation, eye clear produce negative effect.
German experts advise you not to fasten your tie too tightly. Tight ties can compress the jugular veins of the neck, causing more blood to flow to the eyes, thereby increasing eye pressure. Excessive eye pressure may eventually cause more serious damage to the eye than glaucoma. Men with tight ties and rough necks should be wary of long-term damage to their eyes.
The German expert's suggestion, actually belongs to the collar size category