https://blogs.mercola.com:443/sites/vitalvotes/archive/2003/07/29/Tight-Neckties-May-Cause-Glaucoma.aspxGlaucoma is the leading cause of preventable blindness. Apparently tight neckties may raise eye pressures. This may have limited practical significance though as this may only be true during the actual screening of eye pressures. British Journal of OphthalmologyenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)