EL NIÑO AND YOUR EYES: What Ghana and West Africa Need to Know

 By Dr. Samuel Tinagyei | Optometrist and Public Health Educator

When temperatures rise, we often worry about dehydration, heat exhaustion and the effects of intense sunshine on our skin. But have you considered what extreme heat could mean for your eyes?

El Niño is a natural climate phenomenon that affects global weather patterns, including temperature and rainfall. Its effects vary across regions, but changing climate conditions can contribute to heat, drought and other environmental challenges. In Ghana and across West Africa, periods of intense heat and dry weather are a timely reminder that our eyes also need protection.

How Can Extreme Heat Affect Your Eyes?

1. Dry, irritated eyes

Hot, dry and windy conditions can increase tear evaporation, leaving the eyes feeling dry, gritty, itchy or as though something is trapped inside them. People who already have dry eye disease may experience worsening symptoms. Fans, dust and smoke can add to the irritation.

2. Greater exposure to ultraviolet (UV) radiation

Bright sunshine exposes the eyes to UV radiation, which can damage the eye's surface. Excessive exposure may cause painful inflammation of the cornea, commonly known as photokeratitis. Over time, cumulative UV exposure is also associated with conditions such as cataracts and pterygium, a fleshy growth on the white of the eye.

3. Dehydration and eye discomfort

When extreme heat causes excessive sweating and inadequate fluid replacement, dehydration may affect the body's normal functions, including the maintenance of a healthy tear film. This may contribute to eye discomfort, although the relationship between dehydration and specific eye diseases requires careful interpretation.

4. Dust, smoke and airborne irritants

Dry conditions can make dust and other airborne particles more troublesome, particularly for outdoor workers, traders, drivers, farmers and people who spend long hours on the road. These irritants can aggravate existing eye allergies and surface inflammation.

These effects are not inevitable, and not every eye problem experienced during a heat wave is caused by the weather. However, recognising the risks can help us protect our vision.



What Can You Do to Protect Your Eyes?

A few simple habits can make a difference:

  • Wear UV-protective sunglasses. Choose sunglasses labelled UV400 or 100% UVA/UVB protection. Dark lenses alone do not guarantee UV protection. Ask for a photochromic anti-glare lenses from your optometrist. 
  • Use a wide-brimmed hat to reduce direct sunlight reaching your eyes.
  • Stay hydrated. Drink water regularly, especially when working outdoors or sweating heavily.
  • Reduce exposure during the hottest hours. Seek shade when possible and take breaks in cooler environments.
  • Limit direct airflow into your eyes. Fans and air conditioning can worsen dryness when air blows directly at your face.
  • Avoid rubbing irritated eyes. If dust enters your eyes, rinse gently with clean water or sterile saline. Avoid using unprescribed eye drops or traditional preparations.
  • Take persistent symptoms seriously. Do not assume that redness, irritation or blurred vision is simply a result of the heat.


Why Your Optometrist Matters

Optometrists are an important resource for protecting eye health during periods of extreme heat. They can assess symptoms, examine the eye's surface, identify dry eye disease and other eye conditions, recommend appropriate treatment, and advise on suitable UV protection.

They can also help distinguish minor irritation from conditions that require urgent medical attention or referral to an Ophthalmologist if needed. 

Seek urgent eye care if you develop sudden loss or significant changes in vision, severe eye pain, marked light sensitivity, or a painful red eye. Do not wait for symptoms to settle simply because the weather becomes cooler.

A Final Word

As Ghana and the wider West African region navigate changing weather patterns, eye health deserves a place in our conversations about heat and public health. Protecting our eyes should be as routine as protecting our skin and staying hydrated.

Don't wait until your eyes start complaining. Protect them, pay attention to changes, and make your Optometrist a partner in your eye health.

Your eyes are precious. Give them the protection they deserve.

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