SIHOO
SIHOO M57 Ergonomic Mesh Office Chair, High Back Home Desk Chair with 3D Armrests, Lumbar Support and Adjustable Headrest, Comfortable Computer Chair, Big & Tall Office Chair Hold 330 LBS-Black
Excellent
In stock on Amazon.com
How-To Guide
Monitor Positioning for Desk Comfort: A Buying Guide
Where your screen sits decides where your head and neck sit. This guide gives the distance, height and angle guidance from OSHA and Cornell, explains how your chair's recline and height change the picture, and offers a quick setup routine.
As an Amazon Associate I earn from qualifying purchases. We have not physically tested these chairs; scores come from manufacturer and Amazon specifications.
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Amazon.com data updated October 13, 2026, 2:34 pm ET. Price and availability are accurate as of the time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply.
Distance
OSHA states that the preferred viewing distance is between 20 and 40 inches, and its quick tips advise at least 20 inches. Cornell University suggests roughly an arm's length; its check is to sit back and raise your arm until your fingers touch the screen.
If text is too small at that range, enlarge the text in software instead of moving closer.
Height and angle
OSHA says the top of the screen should be at or slightly below eye level, with the screen's center about 15 to 20 degrees below horizontal eye level. Cornell gives a similar picture: eyes aligned with a point about 2 to 3 inches below the top of the monitor casing, and the center about 17 to 18 degrees below horizontal.
OSHA also advises tilting the screen no more than about 10 to 20 degrees.
Bifocals and glasses
OSHA notes that bifocal wearers often view the screen through the lower part of the lens and tip their heads back. Its suggestions are to lower the monitor, raise the chair or use single-vision lenses made for computer work. Cornell separately suggests having your eyes checked periodically.
How the chair changes it
Reclining changes your distance to the screen, so a setup made for upright sitting deserves a second look. Cornell recommends reclining around 100 to 110 degrees, so re-check distance after setting the backrest. OSHA's position guidance lists reclined sitting at 105 to 120 degrees between torso and thighs.
Key Chair Features That Help
- Recline: 2 points for a backrest that reclines to 100 degrees or more, and further points for recline depth in the comfort score.
- Seat height range: adjustable height is scored, and raising the chair is one of OSHA's answers when a screen is too high for a bifocal user.
- Headrest: present and adjustable headrests are scored, relevant if you lean back while watching the screen.
- Upper back support: points for a backrest of at least 25 inches or a headrest, which keeps your torso steady while your eyes work.
- Tilt controls: lock and tension are scored, letting you hold a position at which the screen distance stays right.
Setting Up Your Chair
- Sit as you normally work, then place the screen directly in front of you at least 20 inches away.
- Raise or lower the screen until its top edge is at or slightly below eye level.
- Tilt it back only slightly, within the 10 to 20 degree range OSHA mentions.
- Keep the screen within 35 degrees to either side of straight ahead, as OSHA advises.
- Recline a little, then check that the distance still works.
- Move any paper documents beside the screen, as Cornell suggests, so you do not keep turning your head.
Frequently Asked Questions
How far should my monitor be from my eyes?
OSHA gives 20 to 40 inches as the preferred range. Cornell suggests about an arm's length.
Should the screen be at eye level or below?
OSHA says the top of the screen should be at or slightly below eye level, which tilts your gaze gently downward.
Does a bigger monitor change this?
The sources give no separate rule for large screens, so the same 20 to 40 inch distance and the same angle guidance apply.
What if I wear bifocals?
OSHA suggests lowering the monitor, raising the chair or using single-vision computer lenses, and a visit to an eye care professional can help.
Ranked Comparison
| # | Chair | Ergo Score | Price | Back | Armrests | Weight capacity | Buy |
|---|---|---|---|---|---|---|---|
| 1 | $199.99 | Mesh | 3D adjustable | 330 lb | Check Price | ||
| 2 | $199.99 | Mesh | 4D adjustable | 400 lb | Check Price | ||
| 3 | $349.99 | Mesh | 4D adjustable | 300 lb | Check Price | ||
| 4 | $399.99 | Plastic | 4D adjustable | 551 lb | Check Price | ||
| 5 | $179.99 | Mesh | 3D adjustable | Not listed by the seller | Check Price | ||
| 6 | $329.99 | Mesh | 3D adjustable | 275 lb | Check Price | ||
| 7 | $199.99 | Mesh | 3D adjustable | Not listed by the seller | Check Price | ||
| 8 | $239.99 | Not listed by the seller | 3D adjustable | 300 lb | Check Price |
Amazon.com data updated October 13, 2026, 2:34 pm ET. Price and availability are accurate as of the time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply.
Sources and Further Reading
Chairs are ranked by Ergo Score, computed from manufacturer and Amazon specifications with the same published formula for every chair (how we rate). Specifications and prices come from the Amazon.com listings, checked on October 13, 2026, 2:34 pm ET. We have not physically tested these chairs.
Outside sources
- Computer Workstations eTool: Monitors, U.S. Occupational Safety and Health Administration (OSHA)
- CUergo: Computer Workstation Ergonomics Guidelines, Cornell University Ergonomics Web
- Computer Workstations eTool: Positions, U.S. Occupational Safety and Health Administration (OSHA)
As an Amazon Associate I earn from qualifying purchases. We have not physically tested these chairs; scores come from manufacturer and Amazon specifications.