The Comfort Series · Sleep
Halcyon Slate Black
A rounded oval built around a 22 mm bridge, the widest nose opening we offer.
Bridge width decides whether a frame presses or floats. Halcyon runs 22 mm, wider than anything else in the range, which lifts the whole front off the sides of the nose and spreads contact across a larger area. Around that sits a 52 mm eye in a soft round oval, 43 mm deep, on a 140 mm front with 142 mm temples. For long evening sessions that geometry matters more than shape does: the frame you forget about is usually the one that is not concentrating its weight in one place.
Two tints, two jobs
Amber for the long evening, red for the short night
Amber lensExtended evening wearMeasured transmission at 450 nm, the melanopsin peak, is 0.10%. From 0.48% at 500 nm the curve climbs to 40.5% at 550 nm, so part of the green band is preserved. Luminous transmittance is 50.5%, Filter Category 1, rated for indoor and outdoor use.
Red lensThe final indoor hourThe blue and green bands are gone outright, with zero measured transmission from 380 to 560 nm. What gets through is long-wavelength, 49.7% at 600 nm and 92.9% at 700 nm, with 100% UV protection (UV400).
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.
Fit
Will the Halcyon fit you?
Halcyon spans 140 mm across the front and reads as a generous medium. The headline number is the 22 mm bridge, which suits a wide or flat nose bridge and is the widest opening in this lineup. With a 52 mm eye and 43 mm of lens height, the aperture is tall and rounded, covering well below the pupil. Temples are 142 mm. On a narrow nose bridge this frame will sit lower than intended.
| Frame size | 52-22-142 |
|---|---|
| Front width | 140mm |
| Lens height | 43mm |
| Fit | Medium |
| Shape | Round oval |
| Collection | The Comfort Series |
| Lens options | Amber or Red · zero power or prescription |
| UV protection | 100% UV400, both tints |
In the box
- Halcyon Slate Black frame in your chosen tint
- Hard case and microfiber cleaning cloth
- Spectrophotometer report reference for your lens
- One-year frame warranty, six-month lens warranty
For all orders exceeding a value of 100USD shipping is offered for free.
Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.
Otherwise, standard shipping charges apply. Check out our delivery Terms & Conditions for more details.