A report published in the Psychiatry Research has shown that smoking more than 20 cigarettes a day can damage the eyesight.
According to sciendaily .com , the study included 71 healthy people who smoked fewer than 15 cigarettes in their lives and 63 who smoked more than 20 cigarettes a day . The participants were diagnosed with tobacco addiction and reported no attempts to stop smoking . The researchers looked at how participants discriminated contrast levels and colours while seated 59 inches from a 19 – inch cathode- ray tube monitor that displayed stimuli as they monitored both eyes simultaneously .
The findings of the study indicated significant changes in the smokers’ red -green and blue -yellow colour vision, which suggested that consuming substances with neurotoxic chemicals , such as those in cigarettes, may cause overall colour vision loss . The study authors also found that heavy smokers had a reduced ability to discriminate contrasts and colours when compared to the non – smokers. The co – author of the study , Dr Steven Silverstein , said , “ Cigarette smoke consists of numerous compounds that are harmful to health , and it has been linked to a reduction in the thickness of layers in the brain and to brain lesions , involving areas , such as the frontal lobe, which plays a role in voluntary movement and control of thinking , and a decrease in activity in the area of the brain that processes vision.
“Previous studies have pointed to long -term smoking as doubling the risk for age -related macular degeneration and as a factor causing lens yellowing and inflammation. Our results indicate that excessive use of cigarettes or chronic exposure to their compounds affects visual discrimination , supporting the existence of overall deficits in visual processing with tobacco addiction.” Although the study did not give a physiological explanation for the results , Silverstein said that since nicotine and smoking harm the vascular system , the research suggested they also damage blood vessels and neurons in the retina.
The study authors also suggested that research into visual processing impairments in other groups of people , such as those with schizophrenia who smoke heavily , should take into account their smoking rate or independently examine smokers versus non -smokers .
If you need a platform to promote your business for free, talk to us now! You can join our WhatsApp Group via here 100 YOUNG CEOs FORUM or send mail to any of the following mails: