Can You Wear Contact Lenses in a Sauna?
Updated January 2025 — Backyard Sauna Pro
The short answer is: remove them. You can get away with keeping contacts in for a short session, but there are real reasons most optometrists advise against it.
What Happens to Contacts in a Sauna
Soft lenses dehydrate
A traditional sauna runs 160-185°F with relatively low humidity (10-20%). Soft contact lenses are mostly water. In dry heat, they lose moisture faster than your tear film can replenish it. The lens shrinks slightly, tightens on the eye, and causes discomfort ranging from mild dryness to a gritty scratching sensation. The longer you stay in, the worse it gets.
Corneal irritation risk
A dried-out lens that has changed shape sits differently on the cornea. This can cause micro-abrasions on the corneal surface, which are painful and take a few days to heal. It also increases the chance of the lens sticking and being difficult to remove. For most people this risk is low for a short session, but rises with longer exposure.
Hard lenses (RGP)
Rigid gas-permeable lenses are more heat-stable than soft lenses and do not dehydrate the same way. The risk is lower but not zero — your eyes still dry out in sauna heat, and a rigid lens on a dry eye surface is uncomfortable. Most people with RGP lenses also report it's better to remove them.
What About Steam Rooms?
Different problem. Steam rooms are high humidity (nearly 100%), so lens dehydration is less of an issue. But the warm mist can carry bacteria and fungi, and contacts act as a trap for microorganisms. The infection risk in a steam room is the bigger concern. Optometrists generally say no contacts in steam rooms more firmly than saunas. See our sauna vs steam room comparison for more on the differences.
The Practical Reality
Many people wear contacts in saunas without incident, especially in short sessions. The risk is real but not catastrophic for most healthy eyes. What typically happens is just significant discomfort by the end — the eyes feel dry, gritty, and take a few hours to recover.
The simple answer: remove them before you go in. Leave your glasses outside. In a sauna you are sitting in a small room — you do not need sharp vision. The slight blur is not a practical problem for 15-20 minutes.
FAQ
Can you wear contact lenses in a sauna?
You can, but it is not recommended. Soft lenses dehydrate in dry heat, causing discomfort and mild corneal irritation risk. Removing them before a session is the sensible call.
Will a sauna damage contact lenses?
The lenses themselves are usually fine, but they may temporarily change shape from dehydration. The main risk is eye irritation and discomfort, not permanent lens damage.
What should I do if I need vision correction in a sauna?
Remove contacts, leave glasses outside. The blurriness in a small, stationary environment is rarely a problem for 15-20 minutes.