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[IP] Night lights?

>From YAHOO Health Headlines, June 27.

Study: Night Lights May Cut Diabetes Complication 
Thu Jun 27, 7:06 PM ET LONDON (Reuters) - Going to sleep with a light on may 
help diabetics ( <A HREF="http://rd.yahoo.com/dailynews/nm/sc_nm/inlinks/*http://rd.yahoo.com/DailyNews/manual/*http://search.news.yahoo.com/search/news?p=%22diabetics%22&c=&n=20&yn=c&c=news&cs=nw">news</A> - <A HREF="http://rd.yahoo.com/dailynews/nm/sc_nm/inlinks/*http://rd.yahoo.com/DailyNews/manual/*http://search.yahoo.com/bin/search?cs=nw&p=diabetics">web sites</A>) reduce their risk of developing a serious 
complication which can cause blindness, scientists said on Friday.  
Diabetic retinopathy, which damages the retina of the eye, affects up to half 
of all diabetes sufferers. The disease damages tiny blood vessels in the 
light-sensitive tissue at the back of the eye, called the retina, which can 
cloud vision. But Professor Neville Drasdo, of Cardiff University in Wales, 
said night-time illumination may help prevent the condition. 

Diabetes causes damage by reducing the uptake of oxygen to body tissue, 
including the retina. Scientists suspect that oxygen deprivation to the inner 
layers of the retina during the hours of darkness could be related to 
diabetic retinopathy. When Drasdo and his colleagues studied the impact of 
night-time light on seven patients with Type 2, or adult onset, diabetes and 
eight healthy volunteers they found it helped to counteract the impact of the 
darkness in the diabetes patients. "The finding strengthens support for the 
suggestion that diabetic patients might benefit from sleeping with night-time 
illumination," Drasdo said in a letter to The Lancet medical journal. 

Diabetic retinopathy has no early warning signs. The blood vessels can bleed 
and leave a few specks of blood or spots which may disappear but sometimes it 
does not clear. Large hemorrhages can happen more than once and often occur 
during sleep. 
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