Focus Harvard Front white Background
Side View Focus Harvard Front white Background
Side View Focus Harvard Front white Background
Focus Harvard Front white Background
Side View Focus Harvard Front white Background
Side View Focus Harvard Front white Background
New arrival

Focus Swannies Harvard Tortoise

The ultimate daytime lens. Designed to protect your circadian rhythm for optimal comfort and productivity.
$149.99 USD

Lens

Focus Harvard Front white Background FocusRetro-style square with a brown tortoiseshell frame and vibrant yellow mirrored lenses, shown against a plain white background. RelaxRounded square glasses with a brown tortoiseshell frame and vibrant orange mirrored lenses reflecting blue and purple light, shown against a plain white background. Sleep
Measurements
Regular
Lens Width 51 mm
Bridge 21 mm
Temple 145 mm

The majority of adults find that the regular size is the best fit for them.

Compare the measurements to your current eyewear. The lens, bridge and temple widths are usually marked on the inside arm of the glasses.

This style has nose pads which can be adjusted to fit different nose shapes and change the height the glasses sit on your face.
Select Lens and Purchase
Free US Shipping on orders over $50
30-day money back guarantee
Reduced Visual Fatigue
Helps minimize eye strain from screens and harsh LED lighting so you can stay comfortable longer.
Block the junk light
Designed to filter the harshest part of the blue light spectrum.
Stop eyestrain and headaches
Control your light in a world of screens and harsh LED lighting.
Sustained Energy
Helps prevent digital overstimulation that can lead to mid-day crashes.
Description

Looking for a smarter way to protect your eyes during long screen sessions? Focus Swannies® support your circadian rhythm in a modern world of constant digital exposure - without distorting color or dimming your day.

By selectively filtering artificial blue light from screens and indoor lighting, Focus Swannies® help reduce digital eye strain, visual fatigue, and light-induced overstimulation - supporting clearer thinking, steadier energy, and sustained focus.

No apps. No settings. No disruption to your workflow. Just wear them during screen-heavy hours and stay locked in.

The Harvard features a refined rectangular silhouette that blends classic sophistication with modern everyday style. Crafted from premium acetate, its clean lines, softly rounded edges, and balanced proportions create a timeless look that suits a wide range of face shapes. Its comfortable fit and versatile unisex design make it ideal for all-day wear, while the rich tortoise finish adds warmth, character, and understated elegance. Whether at work, studying, or enjoying everyday moments, the Harvard offers a polished yet effortless style for anyone seeking classic rectangular blue light glasses with a contemporary edge.
Features
CR-39 Lenses

Prescription-grade lenses and anti-reflective coatings for superior visual clarity and protection against blue light.

Cellulose Acetate Frames

Natural, BPA-free material, adjustable, strong, and lightweight.

Classic Barrel Hinges

Provide a structured, tailored fit and keep the frame aligned and stable.
Swannies® Circadian System Guarantee

We’re so sure you’ll love your Swannies that we offer a 30-day 100% money-back guarantee* on our glasses and lighting.

See our full returns policy.

* Please note: the following products are excluded:

  • Prescription eyewear, “Last Chance” offers, individual bundle items.
  • Sleep masks, earplugs, melatonin, linen spray, and oil roll-ons for reasons of hygiene.

See our prescription returns policy.
Fast Shipping

We offer free shipping on all orders of $50 or above.

Shipping costs for orders below $50 are calculated at checkout.

Expedited shipping options are available on qualifying orders. This will be presented as an option at checkout when available.

All prescription lens orders are shipped free within the US.
View details
The junk light epidemic

Can’t sleep? The problem is staring you in the face

  • History of blue light, sunset view

    History

    For 99.99% of human existence, blue light was only present during the day. The sun went down, blue light faded, and our body knew it was time to sleep.

  • Modern blue light smart home

    Fast forward

    Now, blue light is everywhere. Screens and artificial lighting expose us to junk light long after sunset, tricking the brain into thinking it’s still daytime.

  • Stressed man at a desk with multiple people around him holding smartphones and documents.

    Why this matters

    Constant exposure can lead to digital eye strain, visual fatigue, and mental burnout - leaving you foggy, overstimulated, and less productive.

  • woman in classic focus swannies teaching

    A modern solution

    Focus Swannies® Blue Light Filtering technology reduces harsh artificial blue light from screens and LEDs - helping you stay comfortable and clear in bright digital environments.

  • Daily impact

    The result? Your natural sleep rhythm is restored, helping your body recover and wake up properly rested.

Classic_Focus_Tim_Gray
Focus

Filters harsh artificial blue light straining you

Developed from 3+ years of testing with experts in light science, the Focus Swannies® lens is engineered to reduce disruptive artificial blue wavelengths -supporting visual comfort, clearer thinking, and sustained performance in bright digital environments.

all groups aviator prescrption
Focus

No gadgets or gizmos. Just simple science.

Don’t overcomplicate your workday. Protect your eyes and performance without adding more tech to your stack. Track the gains or don’t - either way, you’ll feel the difference in your clarity, comfort, and output.

Doctor focus crystal
Focus

Same screen time. Infinitely better performance.

Same screen time.
Infinitely better performance.

Wear Focus Swannies® during screen-heavy work, travel, or long hours under harsh LED lighting to reduce artificial blue light exposure and support focus and visual comfort.
Focus

Filters harsh artificial blue light straining you

Developed from 3+ years of testing with experts in light science, the Focus Swannies® lens is engineered to reduce disruptive artificial blue wavelengths -supporting visual comfort, clearer thinking, and sustained performance in bright digital environments.

No gadgets or gizmos. Just simple science.

Don’t overcomplicate your workday. Protect your eyes and performance without adding more tech to your stack. Track the gains or don’t - either way, you’ll feel the difference in your clarity, comfort, and output.

Same screen time. Infinitely better performance.

Same screen time.
Infinitely better performance.

Wear Focus Swannies® during screen-heavy work, travel, or long hours under harsh LED lighting to reduce artificial blue light exposure and support focus and visual comfort.
A Swannies® day changes everything

  • Sharper focus

    Blocks the harshest blue light, improving clarity and concentration.

  • Increased energy

    Supports deep and REM sleep, allowing your body to fully recharge.

  • Stop eyestrain and headaches

    Control your light in a world of screens and harsh LED lighting.

  • Long-Term Light Protection

    Supports healthier light exposure habits in a screen-dominated world.

  • Reduced Visual Fatigue

    Helps minimize eye strain from screens and harsh LED lighting so you can stay comfortable longer.
Kensington Focus Swannies frame and lens exploded view

Swannies® Focus Technology

How the world looks through Swannies 

Drag the handle. Left of the line is through the lens.

With lensWithout
Without With lens
White page
Skin
Sky
Phone screen
Leaves
Red
Wood
Night sky

Simulated from the lens's measured color. A lens that blocks blue and green darkens cool colors and keeps warm ones.

Focus Swannies Harvard Tortoise FAQ
How Swannies® redefine blue light protection

Most blue light glasses rely on basic coatings that filter only a small portion of blue light and are rarely validated for real-world performance.

Swannies® are different. Our lenses are precision-engineered to target specific wavelengths that influence focus, relaxation, and sleep. Each lens is third-party tested and designed with a clear purpose within your circadian rhythm, delivering effective blue light reduction without unnecessary color distortion or compromise.

The result is a more intentional, performance-driven approach to light management, not just a tinted lens, but a system designed to support how you function and recover throughout the day.
Will they actually improve my focus or just reduce eye strain?

By reducing harsh blue light exposure, Focus Swannies® help minimize visual fatigue, headaches, and screen-induced strain. This allows you to stay mentally sharp, focused longer, and more comfortable during extended screen use.
Do I need these if I already use night shift or screen filters?

Screen settings only reduce a portion of blue light and vary by device. They don’t protect you from overhead lighting or your full environment. Swannies® provide consistent, full-spectrum light management across all your devices and surroundings, so you’re fully supported wherever you are.
Why Swanwick?

Swanwick is the only brand of blue light blockers that have routinely sought third party validation. We've been studied by the University of Washington and the University of Indiana. We've been featured in a study by SleepScore Labs, and had research findings published in the Journal of Applied Psychology and Harvard Business Review.

There is no other brand on the market that has gone to the lengths we have to make the validation of our technology the backbone of our company. Talk is cheap in the blue light world. Why Swanwick? Because our actions speak way louder than their words.
How much does shipping cost?

We offer free shipping on all orders of $50 or above.

Shipping costs for orders below $50 are calculated at checkout.

Expedited shipping options are available on qualifying orders. This will be presented as an option at checkout when available.

All prescription lens orders are shipped free within the US.
What is your returns policy?

We’re so sure you’ll love your Swannies that we offer a 30-day 100% money-back guarantee* on our glasses and lighting.

See our full returns policy.

* Please note: the following products are excluded:

  • Prescription eyewear, “Last Chance” offers, individual bundle items.
  • Sleep masks, earplugs, melatonin, linen spray, and oil roll-ons for reasons of hygiene.

See our prescription returns policy.
Unlocking Peak Performance
Unlocking Peak Performance
Upgrade your light, upgrade your performance.
— Tim Gray, @TimBiohacker
Sapphire_Focus_Swannies_Tim_Gray
Unlocking Peak Performance
Dimming stimulation lets your nervous system reset.
— Tim Gray, @TimBiohacker
Tim Gray in Relax Swannies
Unlocking Peak Performance
Essential for keeping my circadian rhythm on track.
— Tim Gray, @TimBiohacker
Tim Gray wearing Kensington Sleep Swannies blue light glasses
10 years dedicated to

Better Sleep and Focus

  • Daniel Bove in swannies
    Bad day to be blue light.
    @danielbove
  • Health creator wearing Focus Swannies blue light blocking glasses
    ...provide a sense of calm to the eyes and ultimately the brain
    @purist_natural_medicine
  • Lifestyle creator wearing Focus Aviator Swannies blue light blocking glasses
    Loved the night ones so much I ordered the day
    @itskatiekelly
  • Lifestyle blogger couple wearing Sleep Swannies blue light blocking glasses
    Blue blockers...realign yourself with a new time zone
    @kirstflan
  • Creator wearing Sleep Swannies blue light blocking glasses
    Building melatonin is crucial for a good nights sleep
    @lisamichelleblog
  • Man wearing sunglasses and a cap, with 'Be Kind' text on shirt
    Be kind... to your eyes
    @bigshelbailey

LOVED BY YOU

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The science of better sleep

Control the light. Reset your rhythm.

The light you’re exposed to during the day shapes how alert you feel at any given moment – and how well you’ll sleep later on. Swannies® work as a full, science-backed...
Read more
Swannies® Collection

Light-blocking lenses for full circadian control

Doctor focus crystal

Focus

Daytime lens
Performance & productivity

all groups aviator relax swannies blue light eyeglasses worn by a man cooking.

Relax

Evening lens
Wind down & relaxation

Person lying on a bed using a tablet with headphones and blue light blocking glasses in a dimly lit room.

Sleep

Nighttime lens
Deep rest & recovery

Better light. Better life.

Swannies® Circadian System Guarantee

Try Swannies® for 30 nights. Don’t love them?
Send them straight back for a full refund.
Buy yours now
300,000+ pairs sold