How to Protect Your Eyes in Summer? UV Light Risks in the Mediterranean

The Italian summer exposes the eyes to specific and often underestimated risks. Ultraviolet (UV) rays reflected by the sea, asphalt, and sand combine with prolonged outdoor exposure. Swimming in pools and marine environments, as well as participating in outdoor sports, are all activities that increase eye vulnerability. Protecting your eyes does not mean giving up summer activities; it means adopting practical strategies based on clinical evidence.

How Do UV Rays Damage the Eyes?

Exposure to ultraviolet radiation can damage delicate eye structures, including the cornea, lens, and retina. UV rays are divided into two categories:

• UVA: penetrate deeply and cause gradual damage over time.
• UVB: cause more immediate and noticeable injuries, such as corneal burns.

Solar radiation is strongest between 10 a.m. and 4 p.m. When reflected by water, sand, asphalt, and even grass, UV exposure can be much greater than it appears. You do not need to look directly at the sun to suffer damage; prolonged exposure to reflective environments is enough.

What Long-Term Eye Conditions Can Result from Improper UV Exposure?

Cumulative UV exposure over the years increases the risk of:

• Cataracts: Clouding of the eye's natural lens is the leading cause of reversible blindness worldwide. Italy's aging population experiences a high incidence of UV-related cataracts.
• Pterygium: A tissue growth on the eye surface, commonly seen in regions with high sun exposure, particularly in Southern Italy.
• Macular Degeneration: Damage to the macula that progressively impairs central vision.
• Eyelid Tumors: Basal cell carcinoma of the eyelid has been linked to chronic UV exposure.

How Can You Protect Your Eyes During Summer?

Sunglasses

Not all sunglasses provide adequate UV protection. To ensure proper protection, choose:

• Certified 100% UVA and UVB protection (mandatory labeling in Italy). Lens color does not indicate UV protection. Dark lenses without UV filters can actually be harmful by causing pupil dilation and allowing more UV light into the eye.
• Large or wraparound lenses to reduce exposure from the sides and above.
• Impact-resistant frames, especially for sports activities. Polarized lenses reduce glare from reflective surfaces but do not provide additional UV protection. They must still include certified UV filters.

Additional Protective Measures

A wide-brimmed hat can reduce direct UV exposure by up to 50%, but it offers limited protection against rays reflected from below and the sides. Sunglasses therefore remain essential.

Protective swim goggles shield the eyes from chlorine, freshwater and saltwater microorganisms, helping reduce irritation and infections.

Which Summer Activities Put Your Eyes at Risk?

• Water Sports: Chlorine and salt can strip away the eye's natural tear film. Lake and seawater may contain microorganisms (such as Acanthamoeba) that can cause keratitis. Wearing swim goggles is recommended.
• Land Sports (running, cycling, tennis): Eye injuries, dust, and insects are common hazards. Sports eyewear with impact-resistant polycarbonate lenses is essential.
• Outdoor Work and Gardening: Soil particles, dust, and insects can scratch the cornea. Wraparound protective eyewear is particularly important when using power tools.
• Driving: Sun glare reduces visibility and strains the eyes. Polarized lenses can improve comfort and enhance contrast sensitivity.

What Are the Signs of Acute UV Eye Damage?

Photokeratitis (UV-induced corneal sunburn) is a painful but reversible condition. Symptoms typically appear 2 to 12 hours after exposure and may include:

• Redness.
• Excessive tearing.
• A gritty or sandy sensation in the eyes.
• Light sensitivity.
• Blurred vision.

If you experience these symptoms after spending time in the sun, rest your eyes, avoid bright light, and use artificial tears. If symptoms persist for more than 24 hours or worsen, consult an ophthalmologist. Although photokeratitis is temporary, repeated exposure increases the risk of permanent damage.

When Should You See an Ophthalmologist?

Consult an eye specialist if you notice:

• Sudden changes in vision.
• Persistent eye pain.
• Recurrent infections after swimming.
• Redness that does not resolve within a few days.
• Summer-related dry eye symptoms that do not improve

If you work outdoors for many hours each day or have a family history of UV-related eye conditions (such as early cataracts or pterygium), an annual eye examination is recommended.

An ophthalmologic check-up before summer can help identify individual risk factors and prevent long-term damage.

Learn more about the Ophthalmology Service at UPMC Salvator Mundi International Hospital, available for comprehensive eye evaluations and personalized care.