Contact Lenses in Arugam Bay: Surfing, Salt Water, and Infection Risk

A lot of travelers surf in their contact lenses because glasses are useless in the lineup and they don’t want to deal with blurry vision paddling out. We get it. But wearing contacts in the water here carries one specific risk that’s worth understanding before your trip, not after: a corneal infection that can start small and turn into a genuine emergency within a day or two. It’s rare, but when it happens it happens fast, and it’s one of the few eye problems we see that can threaten someone’s sight.

Why water and contact lenses don’t mix

A contact lens traps a thin layer of whatever water gets behind it against the surface of your eye. In a pool or the ocean that’s not usually dangerous on its own — but Arugam Bay’s lineups sit near a lagoon mouth and river runoff, and after rain that water carries organisms a healthy eye can normally blink away or produce enough tears to dilute. A soft contact lens does the opposite: it holds that water and whatever’s in it directly against the cornea for as long as you keep the lens in.

The specific danger is a parasite called Acanthamoeba, found in freshwater, brackish water, and soil run-off worldwide, including here. It doesn’t cause problems for most people who get it on their skin or swallow a little. But if it gets trapped under a contact lens against the cornea, it can cause Acanthamoeba keratitis — a corneal infection that’s painful, slow to diagnose, and can scar or seriously damage vision if it isn’t caught early. It’s uncommon, but surfers and swimmers who wear contacts in natural water are the group it shows up in most.

What actually increases your risk

• Soft lenses are worse than rigid gas-permeable (hard) lenses for this, because they absorb and hold water against the eye.
• Lagoon water, river mouths, and water after heavy rain carry more organic material and runoff than open ocean water further from shore.
• Sleeping in lenses, even for one night, dramatically increases infection risk of every kind, water exposure or not.
• Topping up contact solution instead of fully replacing it, or rinsing lenses in tap water, introduces the same risk even without surfing.
• Any scratch on the cornea — from sand, a fingernail, rubbing a sandy eye — gives an organism a way in that an intact corneal surface would normally block.

If you’re going to surf in contacts anyway

We’d rather give you a safer way to do it than have you skip the information and wing it:

• Switch to daily disposables for the trip if you can. Throw the pair away after every surf, water exposure or not. This removes most of the risk by itself.
• Never sleep in lenses, even if they’re rated for extended wear, and especially not after a day in the water.
• Take lenses out as soon as you’re out of the water, rinse your eyes with clean water or sterile saline, and give your eyes a lens-free break for a few hours before putting a fresh pair in.
• Never rinse or store lenses in tap water, lagoon water, or seawater, ever, for any reason. Only sterile contact lens solution.
• Carry more solution and spare lenses than you think you’ll need. Running out and improvising is how people end up using water that isn’t safe.
• If you wear lenses day to day, consider prescription sunglasses or swim goggles with corrective lenses for the actual surf sessions, and save your contacts for walking around on land.

Signs to watch for

Most eye irritation after a surf is nothing — the red, gritty eyes that come from sun, salt, and glare settle within hours. Keratitis looks and feels different, and it’s worth knowing the difference:

• Pain that’s out of proportion to how the eye looks, often described as feeling like something is stuck under the lid when nothing is there
• Pain that gets worse rather than better over a day, not easing with rest or lubricating drops
• Significant light sensitivity
• Blurred vision that doesn’t clear
• A visible white or grey spot on the coloured part of the eye (the cornea), sometimes only visible on close inspection
• Watering and redness that’s disproportionate to what you’d expect from simple salt-water irritation

When to come and see us

Come in the same day, don’t wait, if:

• Eye pain persists or worsens more than a few hours after you’ve taken the lens out and rinsed
• You notice any blurring of vision, unusual light sensitivity, or a visible mark on the cornea
• Symptoms started after wearing lenses in the water, especially if you also slept in them
• One eye is significantly more painful, red, or light-sensitive than the other

Acanthamoeba keratitis is notoriously easy to mistake early on for simple irritation or bacterial conjunctivitis, and it responds poorly to standard antibiotic eye drops. The earlier it’s identified, the better the outcome, which is why we’d rather examine an eye that turns out to be nothing than have someone wait at home hoping it settles. We can check the eye under magnification, and if there’s any suspicion of a more serious infection, refer for the specialist ophthalmology assessment it needs without delay.

Prevention beyond the water

• Wash your hands before touching your lenses, every time, including straight after a surf when they may still have sand or salt on them.
• Replace your lens case regularly and never top it up with old solution.
• Don’t wear lenses longer than their rated schedule just because a day is going well.
• Pack a spare pair of glasses for the days your eyes need a rest, or for evenings after a long day in the sun and salt.

Related reading

• Red, Itchy Eyes in Arugam Bay: Conjunctivitis, Sand, and Salt Water
• Surfer’s Eye (Pterygium) in Arugam Bay
• Reef Cuts: How to Treat Them and Why Infection Is the Real Danger

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This article is general health information and not a substitute for medical advice. If your eye is painful after wearing contact lenses in the water, your vision is affected, or things aren’t improving, walk in any time, day or night, or call 1990 for emergency transport.