Computer Blue Light Blocking Screen Protector 20-22 in - Anti-Glare

In this review of the MOSISO 20-22 in computer blue light blocking screen protector, the bottom line is simple: it is a practical choice for anyone who spends long hours at a 16:9 desktop monitor and wants straightforward eye protection without altering screen brightness. The reviewer found the protector effective at reducing UV and a portion of high-energy visible light, while the reversible matte and HD sides give flexible control over glare versus clarity. It is best for office workers, programmers, and casual gamers who use 20, 21.5 or 22 in monitors and want a low-effort hanging filter.

Key Features

• Exact fit for 16:9 monitors: The protector is sized 19.29 x 12.48 in to match 20, 21.5 and 22 in diagonal 16:9 widescreen desktop LED monitors when the screen is measured correctly.
• Blue light and UV filtering: It filters and curbs up to 99% of harmful UV and reduces blue light between 420nm and 460nm by about 45%, helping to reduce eye strain over long sessions.
• Dual-surface design: One side is matte to cut glare and reflection for bright environments, while the smooth HD side preserves maximum resolution when clarity matters.
• Acrylic durability: The acrylic construction resists dust, fingerprints and light scratches and is ultra thin at approximately 0.01 in so it does not noticeably darken the display.
• Easy hanging installation: Small removable top tabs allow fast installation and make it simple to flip the protector to the other side without special tools.

Who It's For

The protector is aimed at people who use 20 to 22 in 16:9 desktop monitors and want a low-cost way to reduce glare and some high-energy blue light exposure. It suits office staff, home workers, programmers and gamers who prefer a non-permanent, hanging filter that can be flipped between anti-glare and high-definition modes.

Those who need full-spectrum blue light removal, precise color-critical work, or a privacy filter should look elsewhere; the product reduces a portion of HEV blue light but is not a color-calibrated solution for professional photo or video grading.

Pros & Cons

Pros

• Reversible matte and HD surfaces let users choose glare reduction or maximum clarity.
• Thin acrylic panel provides surface protection from dust and light scratches without dimming the screen.
• Easy to hang and remove using the included small tabs, making side swaps simple.
• Reduces UV exposure and lowers blue light in the 420-460nm range to ease eye fatigue.

Cons

• Only reduces about 45% of targeted blue light and is not a complete substitute for specialized blue light solutions.
• Size is specific to 16:9 20-22 in monitors, so careful measuring is required before purchase.

Specifications

Brand	MOSISO
Compatible screen diagonal	20, 21.5, 22 in (16:9)
Dimensions (L x W)	19.29 x 12.48 in
Material	Acrylic, ultra thin ~0.01 in
Blue light reduction	Approx. 45% between 420nm-460nm
UV protection	Filters and curbs up to 99% UV
Surface options	Matte anti-glare side and smooth HD side

Our Verdict

The MOSISO 20-22 in blue light blocking screen protector is a sensible value purchase for anyone using a 16:9 20 to 22 in desktop monitor who wants simple eye protection and flexible glare control. It offers reversible matte and HD finishes, decent UV and partial blue light filtering, and an easy hanging installation, making it a practical, low-effort accessory for daily computer use.

Frequently Asked Questions

Will this fit my 22 in monitor?
Measure the visible screen width and height; the protector measures 19.29 x 12.48 in and is intended for 20, 21.5 and 22 in 16:9 monitors.

Does it change screen brightness?
The panel is ultra thin with about 95% clarity so it should not noticeably darken the original screen brightness.

How do you flip between matte and HD sides?
Unplug the two small top tabs and rehang the protector with the opposite side facing the user; no special tools required.