Withdrawal symptoms include chest pain and other heart problems. These symptoms may be relieved with re-exposure to nitroglycerin or other suitable organic nitrates.For workers in nitroglycerin (NTG) manufacturing facilities, the effects of withdrawal sometimes include "Sunday heart attacks" in those experiencing regular nitroglycerin exposure in the workplace, leading to the development of tolerance for the venodilating effects. Over the weekend, the workers lose the tolerance, and when they are re-exposed on Monday, the drastic vasodilation produces a fast heart rate, dizziness, and a headache. This is referred to as "Monday disease. "People can be exposed to nitroglycerin in the workplace by breathing it in, skin absorption, swallowing it, or eye contact. The Occupational Safety and Health Administration  has set the legal limit (permissible exposure limit) for nitroglycerin exposure in the workplace as 0.2 ppm (2 mg/m3) skin exposure over an 8-hour workday. The National Institute for Occupational Safety and Health  has set a recommended exposure limit  of 0.1 mg/m3 skin exposure over an 8-hour workday. At levels of 75 mg/m3, nitroglycerin is immediately dangerous to life and health. See also
References
External links
"Nitroglycerine! Terrible Explosion and Loss of Lives in San Francisco". Central Pacific Railroad Photographic History Museum. Retrieved 23 March 2005. – 1866 Newspaper article
WebBook page for C3H5N3O9
CDC - NIOSH Pocket Guide to Chemical Hazards
The Tallini Tales of Destruction Detailed and horrific stories of the historical use of nitroglycerin-filled torpedoes to restart petroleum wells. Dynamite and TNT at The Periodic Table of Videos (University of Nottingham)
Megalocornea (MGCN, MGCN1) is an extremely rare nonprogressive condition in which the cornea has an enlarged diameter, reaching and exceeding 13 mm. It is thought to have two subforms, one with autosomal inheritance and the other X-linked (Xq21.3-q22). The X-linked form is more common and males generally constitute 90% of cases.It may be associated with Alport syndrome, craniosynostosis, dwarfism, Down syndrome, Parry–Romberg syndrome, Marfan syndrome, mucolipidosis, Frank–ter Haar syndrome, crouzon syndrome, megalocornea-mental retardation syndrome etc. Clinical features
Eyes are usually highly myopic. There may be with the rule astigmatism. Lens may be luxated due to zonular streaching.In rare cases, it might be associated with intellectual disabilities. References
External links

Megalocornea - eMedicine ophthalmology; May 15, 2009; Thomas A Oetting, MD, Mark A Hendrix, MD
An Infant With Enlarged Corneas - medscape