Written by Nordic Light Lab — the UK arm of a Scandinavian family of specialist light-therapy shops, including Lysterapi.no, Norway’s largest light-therapy store with over 10,000 customers. We sell the products we write about, and we say so openly.
“Is this safe for my eyes?” is the question we get most often about red light devices — and it deserves a straight answer rather than reassuring marketing. Here it is.
The short version
The red (~630 nm) and near-infrared LEDs in home therapy devices emit no UV, and at the doses and distances these products are designed for, they are not classed as hazardous to the eyes in normal use. The real-world issue is simpler: brightness and comfort. A large panel is dazzling to look at directly, in the same way a bright lamp is. That is why panels ship with eye protection and masks are designed to be used with eyes closed.
Sensible rules we actually recommend
Keep your eyes closed during facial sessions with an LED mask. Use the supplied goggles with panels, especially at short distance. Do not stare directly into any bright light source, including SAD lamps — they are meant to sit in your field of vision, not be looked at. And the one rule that overrides everything: if you have an eye condition, recent eye surgery, or take photosensitising medication, ask your GP or ophthalmologist before starting. We would genuinely rather lose the sale.
Red light vs blue light — not the same conversation
Most public worry about screens and eyes concerns blue, high-energy visible light. Red and near-infrared sit at the opposite end of the spectrum: low-energy, non-UV, and far gentler on the evening body clock — the same reason red night lighting is the standard recommendation for bedrooms. Lumping “light therapy” into one safety category confuses two very different things.
Frequently asked questions
Is red light therapy dangerous for your eyes?
Red and near-infrared LEDs of the kind used in home devices are non-UV and are not classed as hazardous in normal use. The practical issue is brightness: large panels are intensely bright and uncomfortable to stare at. Use the supplied eye protection or keep your eyes closed during facial treatments, and the risk profile is very reassuring.
Should I close my eyes when using an LED face mask?
Yes - that is the standard advice and how the devices are designed to be used. Our masks shield the eye area, and with eyes closed the exposure is well within comfortable limits.
Who should be extra careful with bright light devices?
Anyone with an existing eye condition, recent eye surgery, or on photosensitising medication (some antibiotics, acne treatments like isotretinoin, and others) should check with their GP or ophthalmologist before starting any light therapy. That applies to SAD lamps and red light alike.
Is red light different from blue light when it comes to eyes?
Yes. The ongoing scientific discussion about light and eye strain mostly concerns blue, high-energy visible light. Red and near-infrared sit at the opposite, low-energy end of the visible spectrum - which is also why red evening light disturbs sleep far less.
Do SAD lamps harm your eyes?
The lamps we stock are UV-free and flicker-free, and are used beside you - not stared into. The standard advice is to have the lamp in your field of vision without looking directly at it. People with eye disease should clear it with a professional first.