What glare actually is
Glare is light you do not want reaching your eyes. On a computer it usually comes in two forms. Reflected glare is the mirror-like image of a window or lamp on the screen, which competes with what you are trying to read. Direct glare is a bright source in your field of view, such as an uncovered window or a bare bulb, that makes your pupils and eyes work harder.
Both can lead people to squint, lean forward or tilt the screen into awkward positions. Reducing them is largely a matter of placement.
Find the source of the reflection
The easiest diagnostic costs nothing. Turn the screen off, or display something dark, and look at what you see reflected in it. Window shapes, lamp shapes, a white wall or even your own shirt can show up. Move your head from side to side, because the reflection moves too, which tells you which object is responsible.
Once you know the source, you have three options: move the source, move the screen, or control the light.
Window placement
Windows are the most common problem because daylight is far brighter than most indoor lighting.
- The usual advice is to place the screen so the window is off to one side, rather than directly behind the screen (which causes direct glare in your eyes) or directly behind you (which causes reflections on the display).
- If you cannot rotate the desk, use blinds, curtains or sheer shades that you can adjust through the day, since the sun’s angle changes.
- Light-colored walls near a window can bounce light too. Sometimes the fix is a small shift of the desk rather than a major change.
Lamps and ceiling lights
Overhead lights can reflect in the screen if the display tilts upward. Some people find that lowering the tilt a few degrees helps. Other options:
- Place a desk lamp to the side so it lights papers or the keyboard area without shining on the display.
- Use shades or diffusers on bare bulbs.
- Avoid pointing adjustable lamps at the screen or at the wall behind it in a way that bounces back.
- Consider lamps that let you adjust brightness, so you can adapt to daytime and evening.
Rooms with very strong overhead lighting may feel better if you turn off some fixtures and use more localized task lighting, provided there is still enough light to move around safely.
Balance the screen with the room
Eyes find it tiring to switch between a bright screen and a dark room or the other way around. A rough goal is for the display to look similar in brightness to the area around it. A white webpage that glows like a lamp in a dim room is probably too bright, while a dim screen in a sunny room will struggle against the light and invite squinting.
Adjust the screen’s brightness manually through the day, or use automatic brightness if your device offers it and you like how it behaves. A modest lamp behind or beside the display can reduce the contrast between a bright screen and a dark wall, as long as it does not reflect in the screen itself.
Some people also change text size, contrast or a dark mode in software. Dark themes help some people and not others, and they do not replace good lighting. Display settings such as screen resolution and scaling also affect how readable text is, so make sure text is not so small that you strain to see it.
Matte versus glossy screens
Some displays have a matte finish that scatters reflections, and others are glossy, which can look vibrant but reflect more. If you are shopping, the finish is worth considering along with panel types and the other features of computer monitors, especially for a bright room. If you already own a glossy screen, controlling the room light is the best approach.
Anti-glare screen filters exist, but quality varies, and some reduce clarity or fit poorly. If you try one, look for a type that suits your screen size and be prepared to return it if it makes text look hazy. A simple hood or shield around the top and sides of a monitor can also block overhead light.
Cleaning matters too
A smudged or dusty screen scatters light and makes glare look worse. Follow the manufacturer’s advice for cleaning a computer screen: usually, power it off, use a soft, lint-free cloth, and avoid spraying liquid directly on the display. Do not use harsh chemicals unless the maker says they are safe.
Watch the whole view, not just the screen
If you use multiple monitors, check each one for reflections, because one display may sit near a window while another does not. Laptops are especially movable, so tilting the lid slightly or rotating the whole machine can solve a reflection in seconds. Also consider glare off glossy desk surfaces or documents, which can bother you even if the screen is fine.
A quick checklist
- Turn off the screen and identify reflections.
- Move the desk or screen so windows are at the side.
- Use blinds or curtains to control daylight.
- Shift or shade lamps so they do not shine on the display.
- Match screen brightness to the room.
- Clean the screen gently.
When tired eyes persist
Even in a well-lit room, long hours of screen work can leave your eyes tired, and the cause is not always lighting. Distance, posture and breaks matter, and so does having your eyes checked. If you experience persistent discomfort, blurred vision, headaches or changes in your sight, see an eye care professional. This article cannot diagnose a problem, and lighting changes are not a substitute for an exam.