Eye Health at Altitude: What Flight Attendants Need to Know

Eye Health at Altitude: What Flight Attendants Need to Know

Flight attendants operate in one of the most unique work environments on Earth—or more accurately, above it. While the average office worker might worry about screen time and fluorescent lighting, your “office” is at 30,000 feet, where air quality, humidity, lighting, and time zones constantly shift, taking a toll on the eyes.

Fly High and Dry

Aircraft cabins are kept at a comfortable temperature of around 24–25°C, but humidity is another story. On a recent trip from Sydney to Copenhagen via Dubai, I carried a hygrometer to measure the humidity (Figure 1). In Sydney, the relative humidity was around 50–60%, meaning the air was about half full of water at that temperature. As temperature rises, relative humidity falls if no extra moisture is added.

Once airborne, humidity dropped dramatically to around 10%. To put this into perspective, the Simpson Desert—Australia’s driest region—has an average relative humidity of 20–30% at 3 pm according to the Bureau of Meteorology. That makes the A380 cabin drier than the Simpson Desert.

Such low humidity speeds up evaporation from the eyes, leading to dryness, irritation, and blurred vision.

For contact lens wearers, the challenge is greater. The cornea—the transparent “window” at the front of the eye—has no blood vessels, so it relies on oxygen from the air. A contact lens acts as a partial barrier, reducing this oxygen supply. At 30,000 feet, even though the cabin is pressurised, oxygen levels are lower than at sea level, further reducing corneal oxygenation. Combined with low humidity, this makes lenses prone to sticking to the eye, worsening glare, and causing discomfort—especially if worn while sleeping on long flights. Add fatigue, disrupted sleep cycles, and the natural changes of ageing, and it’s no surprise dry eyes are one of the most common health complaints among crew.

Let There Be (Dim) Light

Lighting conditions onboard pose another challenge. Cabins are often dimmed to help passengers rest, but this makes reading difficult. For crew over 42, near vision (at 40 cm) in dim light reduces by about two font sizes. From the mid to late 40s, presbyopia—age-related near vision decline—progresses quickly, making tasks like reading smart devices or preparing food difficult without reading glasses. Applying makeup in the hotel or onboard may also require magnification.

The silver lining is the compact cabin space. On my A380 flight, I could touch the ceiling when I stood up with arms extended. This means most tasks are within arm’s reach. Trolleys, seat numbers, and signage are labelled in large font, and galley shelves above shoulder height are clearly marked. Intermediate vision tasks (objects 60–70 cm away) are often manageable without glasses or with only low-powered reading glasses. It’s the near tasks—reading, device use, or food preparation—that require frequent use of glasses for crew over 40.

Practical Steps to Protect Your Eyes

Fortunately, there are simple strategies crew can use to reduce discomfort in the air:

·Blink often: Device use reduces blink rate, worsening dryness. Make a conscious effort to blink at least once every 20 seconds.

· Use lubricating drops: Preservative-free drops are safest for frequent use and come in single-use ampoules that fit easily into a pocket. Gels or ointments last longer but can blur vision temporarily, which may be impractical in emergencies.

· Avoid sleeping in contact lenses: This reduces both dryness and the risk of infection.

If dryness persists despite these steps, it’s best to discuss further options with an eye specialist.

Longer-Term Options

For crew who rely on glasses or contact lenses, refractive surgery may provide a more practical solution. A variety of well-established modern vision correction procedures are available in Australia, including LASIK, Contoura, SMILE, PRK, and ICL. Success rates are high—often exceeding 99% accuracy—with fast recovery times.

For those who need both distance and near correction, refractive lens exchange (similar to early cataract surgery) with a trifocal intraocular lens can provide spectacle-free vision at all ranges: distance, intermediate (about 60 cm), and near (about 40 cm).

Final Thoughts

The aircraft environment is tough on the eyes. Dryness, fatigue, and lighting challenges affect vision daily. By taking simple protective steps—and exploring corrective options when needed—flight attendants can protect their eye health, maintain comfort, and continue performing at their best.