The Condition Of Retina
A new medical study revealed that tea and coffee can have a positive effect on the health of the posterior retina, which is responsible for central visual acuity.
A medical study reveals a positive effect of coffee and tea on the health of the posterior retina
The study was conducted by a group of Chinese scientists, who asked more than 35 thousand people about the average number of cups of coffee and tea they drink per day, during the last year.
Through their findings, the scientists divided these people into 4 groups: from zero to more than 4 cups of tea or coffee per day.
The researchers measured the thickness of the macular retinal nerve fiber layer using optical coherence tomography, a non-invasive imaging technique that uses reflected light to frame the back of the eye, and then the image was automatically analyzed by the built-in software.
After that, the scientists began to adjust the results, based on a number of factors, such as: age, gender, average total household income, poverty index, as well as smoking, race, education, body mass index and sleep duration, in addition to some other factors.
The researchers found that the thickness of the nerve fiber layer of the macular retina increased in people who drank between 2-3 cups of coffee and tea per day.
However, scientists have warned against consuming instant coffee, considering that it may be a risk factor for serious health disorders, including neurodegenerative diseases.
Retinal detachment is an eye disorder in which the retina peels away from its underlying layer of supportive tissue.
The initial detachment may be local, but without prompt treatment the retina may detach completely, leading to vision loss and blindness. This is a medical emergency.
The retina is a thin layer of light-sensitive tissue on the back wall of the eye.
The eye’s optical system focuses light on the retina in much the same way as focusing light on film in a camera.
The retina translates this image focused on nerve impulses and sends them to the brain via the optic nerve.
Sometimes, posterior vitreous detachment or injury or trauma to the eye or head causes a small tear in the retina.
This tear allows vitreous fluid to seep through under the retina, causing it to peel off or separate away from the retina like a bubble on the walls.
When the retina at the back of the eye retracts from its normal position, this condition is known as retinal detachment.
Depending on the type of detachment, the causes of this condition are:
Autologous retinal detachment is caused by a tear in the retina that allows fluid to pass through. One of the most common causes of such a condition is the aging factor.
When the retina detaches, scar tissue grows on the surface of the retina, causing the retina to become obstructed from the back of the eye. The main cause of such a condition is diabetes.
In the exudative type of detachment, fluid builds up under the retina, some of the causes of which are inflammation in the eye, tumors, and age-related macular degeneration.
What are causes of cataracts?
Although age-related changes are the main cause of cataract formation, they can also be affected by other factors.
These include free radicals, UV rays, smoking, and steroids.
Medical disorders such as diabetes and certain metabolic conditions can also contribute to the condition. composition.
Physical injury to the eye (such as a blunt blow, cut, or puncture), extreme heat or cold, chemical burns, or radiation therapy can cause cataracts. Rarely, a baby is born with a congenital cataract, usually due to an infection during pregnancy or a genetic disorder, as often as possible.
The closer people are to the equator the greater the chance of developing cataracts.
What are symptoms of cataracts?
Symptoms of cataracts vary because they form in different ways in most patients.
The initial symptoms of cataracts are progressively blurry vision, double vision, or both. Things may start to look yellow, blurry, or distorted.
People may experience increasing nearsightedness which requires frequent changing of glasses. Others may find they need more light to see clearly.
Cataracts can cause other visual disturbances – decreased color vibrancy, difficulty with reading and colored halos around lights.
People with diffuse cataracts in the back walls of their lenses are more likely to experience glare, because cataracts cause light to scatter in later stages, poor vision leading to blindness.
What is treatment for cataracts?
Early cataracts, if they lead to nearsightedness, can be controlled by prescribing stronger glasses or contact lenses. There is no medical treatment that can prevent or reverse the development of cataracts. Once cataracts appear, surgical removal remains the only treatment.
What are prevention methods?
Cataracts that occur due to the aging process cannot be prevented as the aging process itself cannot be prevented Using the eyes for reading and similar activities has nothing to do with the formation of cataracts Avoiding eye use will not prevent cataracts To date according to all medical research, there is no Medication to prevent or treat cataracts The only known cure for cataracts is surgery
Is there a relationship between coffee and smoking? > Experts answer
Drinking a cup of coffee in the morning is often associated with cigarette addiction in smokers, amidst a question about the reason for this connection that makes the two things go hand in hand.
To answer this question, American researchers from the University of Florida followed two compounds in coffee that directly affect nicotine receptors in the brain.
The researchers concluded that an organic compound in coffee may help restore receptor dysfunction that leads to nicotine cravings in smokers.
According to the UPI news agency, the researchers applied a dark roasted coffee solution to the cells that emit nicotine receptors in mice.
Study author Roger Papke, a professor of pharmacology at the University of Florida College of Medicine, said: I often wondered why the two habits were associated. Many smokers look for coffee in the morning. We wanted to know if there were things in coffee that affected the nicotine receptors in the brain.
The University of Florida published the results of its research in the Journal of Neuropharmacology, knowing that the researchers stressed the need for more research on a large scale, and its application to humans.