Pro-Optix Optometry and Dry Eye Centre

When you’re focused on a screen, your blink rate can drop by as much as 50%, and your blinks become incomplete.

Over time, those incomplete blinks can reduce the normal flow of oil from the meibomian glands in your eyelids. These glands produce the oil layer of your tears, which helps prevent tears from evaporating too quickly.

When the oil isn’t flowing properly, the glands can become clogged, a condition called Meibomian Gland Dysfunction.

As the tear film becomes unstable, your vision may fluctuate throughout the day. One minute things are sharp, the next they’re blurry, then a few blinks later they’re clear again.

So if you spend hours on a computer and your vision seems to come and go, it may not just be eye strain, it could be an early sign that your meibomian glands aren’t functioning the way they should.

When you stare at a screen for long periods, your blink rate can drop by more than half. Blinking is what spreads a protective oil layer across your eyes, produced by tiny glands in your eyelids called the meibomian glands.

When you don’t blink enough, that oil doesn’t get released properly. Over time, it can thicken and start to clog these glands. This can lead to meibomian gland dysfunction (MGD), one of the most common causes of dry eye disease.

That’s when symptoms show up: burning, a gritty sensation, redness, blurry vision, and eyes that feel tired even when you’re not.

It’s not just “screen time” itself, it’s reduced blinking that slowly disrupts your eye’s natural lubrication system.

The good news is, this can often be improved. Regular screen breaks, conscious blinking, and better screen habits can help slow or prevent progression.

MGD is manageable, but it responds best when you treat the glands, not just the surface dryness.

And if symptoms are significant, it’s worth seeing a dry eye specialist. There are in-office and medical treatments that directly target gland function! You don’t have to suffer!