Blackout curtains solve glare by removing the light source entirely, which also removes the reason most people want a window nearby in the first place. Most glare problems can be fixed with desk orientation and monitor angle instead — cheaper, reversible, and without losing the daylight.
Facing a desk directly toward a window puts bright light straight into your eyes and behind your monitor, both at once. Facing directly away puts the window behind you, reflecting in the screen. Perpendicular — window to your side — avoids both problems and is the single most effective change for most rooms, more effective than any screen coating or monitor adjustment.
Tilting a monitor even 5-10 degrees can redirect a reflection that a straight-up angle catches directly. This is especially relevant for overhead lighting, which hits a vertical screen at an angle that often lines up with typical eye height — a slight downward tilt moves that reflection out of the visible range without changing anything else about the setup.
If repositioning isn't fully possible (a desk that can't move, a window that can't be avoided), a matte anti-glare film is the next step. It reduces direct reflections but adds a slight softness and, on very high-resolution screens, a faint graininess some people notice more than others. It's a real fix, not a placebo, but it's a compromise on image sharpness — worth trying repositioning and lighting changes first since those cost nothing and don't affect image quality.
Direct overhead lights, especially bare bulbs or unshaded fixtures, create the same reflection problem as a window, just from a different angle. If your desk lamp or ceiling light sits directly above or slightly behind your monitor, that's a likely glare source independent of any window in the room — check this before assuming a window is the only culprit.
Perpendicular to the window is generally best — facing directly toward it causes glare and eye strain from the bright background, while facing directly away puts the window behind the monitor, creating reflections and washing out the screen.
Matte anti-glare films reduce direct reflections effectively but slightly soften image sharpness and can create a faint graininess, especially noticeable on high-resolution displays. They're a reasonable fix for moderate glare but not a full substitute for correcting desk or monitor positioning.
Increasing brightness competes with glare rather than eliminating it, and pushing brightness high to compensate for a bright room increases eye strain over time. Reducing the light source's effect on the screen is more effective than out-brightening it.
The honest takeaway: reposition before you buy anything — desk orientation and monitor tilt fix most glare for free, and a screen film is a reasonable next step only if physical repositioning genuinely isn't possible in your room.
Once glare is under control, color accuracy is easier to judge — see our guide to calibrating monitor color without special equipment.
Flag for future review: anti-glare film quality varies significantly by manufacturer — general guidance above, not a review of a specific tested product.