However, they added: “This white ring is called an arcus and it may appear without the presence of high cholesterol.
“An arcus can appear as part of the natural ageing process of the eye, but anyone, whatever their age can develop an arcus from high cholesterol levels.”
Although some people can be more likely to have high cholesterol due to their genetics, the NHS says “it’s mainly caused by eating fatty food, not exercising enough, being overweight, smoking and drinking alcohol.”
Some patients will need to take medication to lower their cholesterol while others will be told to eat a healthier diet and exercise more.
