Sleepaxa Chrono Brunt Umber Computer Glasses – Medium Rectangle, 40 mm Lens Depth

Chrono Brunt Umber

The same compact rectangle in a burnt-earth umber, for anyone who finds black frames too severe against their skin.

Brunt Umber is the warm counterpart in this outline. Brown fronts behave differently from black ones at close range: the rim reads as a soft boundary rather than a hard line, which is why a lot of people who dislike how black glasses look in a video call get along with umber. Underneath, the shape is a tidy rectangle measuring 49 mm per lens across a 139 mm front, with a 20 mm bridge and 145 mm temples. The figure to pay attention to is the 40 mm lens depth. On a single large monitor that is enough to keep the top toolbar and the lower status bar inside the tinted field while your head stays still.

Cut at the blue end, open everywhere else

• 0% measured transmission below 400 nm - UV fully blocked
• 36.8% at 450 nm - the short-wavelength load from screens is cut without removing it
• 76.5% at 550 nm - working brightness retained
• Rising to 95.0% at 700 nm - color balance on screen stays usable
• Luminous transmittance 76.5%, Filter Category 1

All figures are single-lens spectrophotometer measurements from our own laboratory reports for this lens, tested to EN ISO 12312-1, ANSI Z80.3 and AS/NZS 1067.1. Individual response varies.

Will the Chrono fit you?

Start from the 139 mm front, which is medium but not generous, and compare it to the frame you wear now. A 49 mm lens with a 20 mm bridge spreads the load across the nose rather than pinching it. The 40 mm depth is the number that decides comfort here: deep enough to cover a full monitor at arm's length, shallow enough to clear the cheekbone when you smile. Temples measure 145 mm.

• Chrono Brunt Umber frame with DayActive lenses
• Hard case and microfiber cleaning cloth
• Spectrophotometer report reference for your lens
• One-year frame warranty, six-month lens warranty