For most people, a change in vision is often attributed to ageing, eye strain, or the need for a new pair of prescription glasses. However, what many do not realise is that changes in eyesight can sometimes be the first warning sign of a much bigger health problem.
Our eyes are often described as windows to the world, but they are also windows into our overall health. Whenever we detect a change in our vision, our first instinct is to visit an optician to get prescription glasses. What if I told you that a change in your vision could be an indicator that there is a deeper problem in your body?
Non-communicable diseases continue to pose a growing public health challenge in Kenya and globally. Conditions such as high blood pressure, diabetes, cardiovascular disease, and cancer account for a significant proportion of illness and premature deaths. Yet many people remain unaware that these conditions can also have devastating consequences on their eyesight.
The World Health Organization lists blurred vision or a change in vision as a symptom of hypertension. One of the lesser-known complications of hypertension is hypertensive retinopathy. This occurs when prolonged high blood pressure damages the tiny blood vessels that supply the retina – the light-sensitive tissue at the back of the eye responsible for vision. Over time, this can lead to partial or complete vision loss.
The challenge with hypertensive retinopathy is that it often develops silently. Many people experience no symptoms in the early stages and only seek medical attention when they notice blurred vision or other visual disturbances. By then, significant damage may already have occurred.
Diabetes presents an equally serious threat to eye health. Diabetic retinopathy develops when persistently high blood sugar levels damage the blood vessels in the retina. It remains one of the leading causes of preventable blindness among adults worldwide.
Unlike in hypertension, diabetic retinopathy may eventually present noticeable symptoms, particularly in its advanced stages. These can include blurred vision, dark spots or “floaters,” flashing lights, difficulty seeing at night, or sudden vision loss in one or both eyes. Unfortunately, by the time these symptoms appear, the disease may already be at an advanced stage.
The good news is that vision loss resulting from diabetes and hypertension is often preventable through early detection and proper disease management.
Regular monitoring of blood pressure and blood sugar levels can significantly reduce the risk of complications. Individuals living with diabetes should strive to maintain healthy glucose levels and attend regular eye examinations. Similarly, people with hypertension should adhere to prescribed medication, maintain a healthy diet, stay physically active, and routinely monitor their blood pressure.
More broadly, preventing these conditions starts with adopting healthier lifestyles. Eating a balanced diet, engaging in regular physical activity, avoiding tobacco use, limiting alcohol consumption, managing stress, and attending routine health screenings can all help reduce the risk of developing NCDs.
This is the message at the heart of Doctors for Healthy Living’s Know Your Numbers (KYN) campaign. The initiative encourages Kenyans to take charge of their health by regularly checking key health indicators such as blood pressure, blood sugar, cholesterol levels, and body mass index. These simple checks can identify health risks early, often before symptoms appear.
Many non-communicable diseases develop gradually and silently. They may not cause pain or obvious symptoms in their early stages, but over time, they can significantly reduce the quality of life and lead to serious complications, including blindness.
As you schedule your next wellness check, remember that protecting your eyesight goes beyond visiting an optician. Comprehensive eye examinations conducted by an ophthalmologist not only safeguard your eyesight but also provide valuable insights into your overall health.
Your eyes may be telling you more than you think. Listen to them. Know your numbers. Take charge of your health today.