Featured Research

from universities, journals, and other organizations

Coffee Drinking Protects Against An Eyelid Spasm

Date:
June 22, 2007
Source:
BMJ Specialty Journals
Summary:
People who drink coffee are less likely to develop an involuntary eye spasm called primary late onset blepharospasm, which makes them blink uncontrollably and can leave them effectively "blind," according to a new study. The effect was proportional to the amount of coffee drank and one to two cups per day were needed for the protective effect to be seen.

People who drink coffee are less likely to develop an involuntary eye spasm called primary late onset blepharospasm, which makes them blink uncontrollably and can leave them effectively 'blind', according to a new study.

The effect was proportional to the amount of coffee drank and one to two cups per day were needed for the protective effect to be seen. The age of onset of the spasm was also found to be later in patient who drank more coffee -- 1.7 years for each additional cup per day.

Previous studies have suggested that smoking protects against development of blepharospasm, but this Italian study did not show a significant protective effect.

Late onset blepharospasm is a dystonia in which the eyelid muscles contract uncontrollably; this starts as involuntary blinking but in extreme cases sufferers are rendered functionally blind despite normal vision because they are unable to prevent their eyes from clamping shut.

The study involved 166 patients with primary late onset blepharospasm, 228 patients with hemifacial spasm (a similar muscle spasm that usually begins in the eyelid muscles but then spreads to involve other muscles of the face) and 187 people who were relatives of patients. The second two groups acted as controls.

The participants were recruited through five hospitals in Italy and asked whether they had ever drank coffee or smoked and for how many years. They were also asked to estimate how many cups of coffee they drank and/or packs of cigarettes they smoked per day. The age of onset of muscle spasms was recorded for patients who experienced them and a reference age was calculated for each of the patients' relatives based on the duration of the spasms in the other group.

Regression analysis was used to observe the relationship between coffee drinking and smoking on the development of blepharospasm.

The authors say: 'Our findings raise doubt about the association of smoking and blepharospasm but strongly suggest coffee as a protective factor.'

'The most obvious candidate for the protective effect is caffeine, but the low frequency of decaffeinated coffee intake in Italy prevented us from examining the effects of caffeine on blepharospasm.

They suggest that caffeine blocks adenosine receptors as has been proposed for its mechanism in protecting against Parkinson's disease.

The authors estimate that people need to drink one to two cups of coffee per day for the protective effect to be seen.

'Considering that the caffeine content of a cup of Italian coffee (60--120 mg) is similar to the average content of a cup of American coffee (95--125 mg), the protective effect on the development of blepharospasm might be exerted at caffeine doses greater than 120--240 mg, comparable with the caffeine doses suggested to be protective in Parkinson's disease,' they say.

This research was published online ahead of print in the Journal of Neurology Neurosurgery and Psychiatry.


Story Source:

The above story is based on materials provided by BMJ Specialty Journals. Note: Materials may be edited for content and length.


Cite This Page:

BMJ Specialty Journals. "Coffee Drinking Protects Against An Eyelid Spasm." ScienceDaily. ScienceDaily, 22 June 2007. <www.sciencedaily.com/releases/2007/06/070620073410.htm>.
BMJ Specialty Journals. (2007, June 22). Coffee Drinking Protects Against An Eyelid Spasm. ScienceDaily. Retrieved July 24, 2014 from www.sciencedaily.com/releases/2007/06/070620073410.htm
BMJ Specialty Journals. "Coffee Drinking Protects Against An Eyelid Spasm." ScienceDaily. www.sciencedaily.com/releases/2007/06/070620073410.htm (accessed July 24, 2014).

Share This




More Health & Medicine News

Thursday, July 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Idaho Boy Helps Brother With Disabilities Complete Triathlon

Idaho Boy Helps Brother With Disabilities Complete Triathlon

Newsy (July 23, 2014) An 8-year-old boy helped his younger brother, who has a rare genetic condition that's confined him to a wheelchair, finish a triathlon. Video provided by Newsy
Powered by NewsLook.com
Thousands Who Can't Afford Medical Care Flock to Free US Clinic

Thousands Who Can't Afford Medical Care Flock to Free US Clinic

AFP (July 23, 2014) America may be the world’s richest country, but in terms of healthcare, the World Health Organisation ranks it 37th. Thousands turned out for a free clinic run by "Remote Area Medical" with a visit from the Governor of Virginia. Duration: 2:40 Video provided by AFP
Powered by NewsLook.com
Stone Fruit Listeria Scare Causes Sweeping Recall

Stone Fruit Listeria Scare Causes Sweeping Recall

Newsy (July 22, 2014) The Wawona Packing Company has issued a voluntary recall on the stone fruit it distributes due to a possible Listeria outbreak. Video provided by Newsy
Powered by NewsLook.com
Huge Schizophrenia Study Finds Dozens Of New Genetic Causes

Huge Schizophrenia Study Finds Dozens Of New Genetic Causes

Newsy (July 22, 2014) The 83 new genetic markers could open dozens of new avenues for schizophrenia treatment research. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins