Screens change how you blink
Digital eye strain is the name for the eye and vision symptoms that come with long screen use. Reviews list headache, eye strain, redness, burning, blurred vision, and dryness among the most common.[1] A key reason for the dryness: people blink less often when they concentrate on a screen, which lets the eye’s surface dry out and leads to dry eye-like symptoms.[1]
How that plays out with a scleral lens
A scleral lens changes the picture, but doesn’t remove it.
- Under the lens, your cornea sits in a reservoir of saline, which keeps it continuously wet.[4] That’s one reason people with dry eye disease are fitted with scleral lenses.
- On top of the lens, the tear film still has to spread over the lens surface with every blink. Poor wetting of the lens surface and deposits are among the things that can degrade vision during wear.[5] If you blink less, that front surface can dry and blur.
- The white of the eye and lids outside the lens are still exposed, so dryness symptoms around the lens are possible.
A 2026 review on contact lenses and digital eye strain found little direct evidence either way on whether contact lenses help or worsen screen symptoms, and noted that eye care professionals should weigh possible benefits against possible effects on the eye’s surface and leftover astigmatism.[3]
Fogging in the afternoon
Some wearers notice their vision going milky a few hours into the day. In a study of 120 veterans wearing scleral lenses, 15.8% reported midday fogging or bubbles.[6] On a workday, that’s when it shows. A planned midday removal, rinse, and refill can help.[5] In a review of 97 patients with irregular corneas, those who took brief breaks every 4 to 5 hours of continuous wear to refill their lenses had a higher success rate.[7] Ask your fitter whether a midday refill suits you, and keep a kit at your desk. See the emergency kit.
Habits that help
Reviews of digital eye strain recommend the same practical steps for everyone, and they apply with scleral lenses too:[2][1]
- Take regular breaks from the screen, and look at something in the distance. The 20-20-20 rule is one easy version: every 20 minutes, a 20-second break looking at something 20 feet away.[2]
- Blink often, on purpose. Set a reminder if it helps.[2]
- Improve your lighting and cut down glare on the screen.[2]
- Use artificial tears your fitter approves. Preservative-free tears can usually go over a scleral lens.[4] Ask before using any eye product.[9] See can you use eye drops with scleral lenses.
Focus at screen distance
From the early to mid-40s, the eye’s ability to focus up close starts to fade.[8] If your lenses are set for distance, your screen may start to look soft. Computer glasses worn over your lenses, prescribed with the lenses in, are a common fix. See can you wear glasses over scleral lenses.
Tell your employer
The FDA advises contact lens wearers to let their employer know, since some jobs require eye protection or may require that you not wear lenses.[9]
Common questions
What is the 20-20-20 rule?
It's a simple break habit often suggested for screen work: every 20 minutes, take a 20-second break to look at something 20 feet away. A review of digital eye strain lists it alongside regular breaks, better lighting, and less glare.
Do blue-light glasses help?
A 2026 review found little high-quality evidence that blue-light filters reduce digital eye strain symptoms. Breaks, blinking, and the right prescription for your screen distance are better-supported places to start.
My vision gets foggy every afternoon at my desk. Is that the screen?
Probably not the screen itself. Midday fogging usually comes from debris building up in the fluid behind the lens or from the tear film on the front of it. Tell your fitter; the fit, your routine, or treatment for dry eye may help.