TheraSpecs Sleep is the precision-tinted lens made for filtering the harmful blue wavelengths encountered in the hours before bed. Its orange tint blocks 100% of blue light at and below 520nm, which is the range associated with disrupted circadian rhythms and melatonin cycles. Worn in the hours before bed, Sleep can help manage evening blue light exposure from phone screens, TVs, laptops, and any LED or fluorescent lighting. Every pair also carries an anti-glare coating to cut harsh glare from lamps and screens.

One to three hours before bedtime is the general guidance for wearing TheraSpecs Sleep lenses, though the right window depends on your evening and how much artificial light is in it. Someone watching TV or scrolling a phone up until lights-out has more exposure to manage than someone reading under a dim lamp.

Sleep comes in a single strength, so the variable to adjust is time rather than tint. Extend the window on nights with heavier screen use, and prioritize a consistent routine over hitting an exact number. Once the lights are out and the room is dark, there is nothing left to filter, and Sleep is not made to be worn while sleeping.

Most glasses sold as blue light glasses have clear or nearly clear lenses that use a coating to reflect a narrow band in the near-UV and violet range, around 400nm. That band doesn't cover the fuller range that can affect your sleeping patterns. Additionally, a lens without visible tint isn't absorbing a substantial amount of visible blue light to begin with.

TheraSpecs Sleep is a deep orange tint for that reason. It absorbs every blue wavelength at and below 520nm, which a typical clear blue light lens leaves mostly untouched. The tradeoff is that Sleep is an evening lens rather than an all-day one, which is why TheraSpecs offers separate daytime options.

Yes, especially where the lens stops transmitting light. Most glasses marketed for sleep benefits are deep amber or orange, so anything with a softer tint may not be removing all the necessary wavelengths.

This is why the TheraSpecs Sleep lens is a vibrant orange color, which is a byproduct of its 100% blue light filtering at and below 520nm. It's also the one lens in the TheraSpecs catalog where the color blue is not perceived at all when looking through it, every other tint shifts color perception while still letting the wearer see all colors.

Still, color alone doesn't tell the whole story. Two lenses can look nearly identical and filter very differently, so it's important to confirm the actual filtering specification of any sleep lens.

Both. Screens, LEDs, and fluorescent bulbs emit a high proportion of their output in blue wavelengths, and TheraSpecs Sleep filters them all the same way regardless of the source. It comes in a variety of frames, including wraparound styles and fitovers.

For everyday protection, TheraSpecs offers a full daytime range including FL-Pro, FL-Blend, Flex, and Contrast HEV.

The TheraSpecs Sleep lens is made for the hours before bed rather than all-day wear. Daytime light exposure plays a role in circadian timing, so a lens that blocks that range works against you in the morning. Because the orange tint shifts color perception more than the rest of the lineup, it's best reserved for the evening hours.

TheraSpecs offers several lenses for daytime light management instead. FL-Pro, FL-Blend, and Flex use precision FL-41 tints that filter most strongly between 480 and 520nm, the range tied to general light sensitivity from artificial sources. Contrast HEV works differently, filtering high-energy visible light below 455nm with an emphasis on visual clarity and contrast for all-day wear. Pairing a daytime lens with Sleep for the evening is a common approach, and the lens assistant can narrow down which daytime option fits your environment.

Yes. Peer-reviewed research has established that exposure to short-wavelength light in the evening suppresses melatonin, the hormone tied to sleep timing and duration. Related work has documented what follows evening exposure to this light: a longer time to fall asleep, less overall sleep duration, less time in deep and REM stages, more reported sleepiness and fatigue the next day, and elevated alertness and heart rate.

The TheraSpecs team reviewed this body of published research to determine where a lens for evening use needed to filter, which is how the Sleep lens arrived at a full block of every wavelength below 520nm rather than a partial filter of a narrower band. TheraSpecs are also frequently recommended by neurologists and other medical professionals for managing various light sensitivities.

Yes, both. Our lenses can be made with a prescription, either in a TheraSpecs frame or in a pair sent in through the Send in Your Own Frame option. They can also be made as readers if you just need magnification.

TheraSpecs also offers WearOver styles that sit comfortably over your existing frames, so you can add the tint and protection you need without changing your everyday pair.