Ocushield Blue Light Filters FAQs

How much blue light does Ocushield block?

Developed by qualified optometrists, our medically-rated screen protectors for smartphones and tablets effectively block up to 99% of harmful UV & blue light emissions between 300-400nm and up to 40% of harmful blue light between 400-470nm. Meaning you’re protected from harmful blue light and all of the nasty stuff that comes with it - such as headaches, tired eyes, sleepless nights and premature ageing.

What is the Ocushield Blue Light Filter made of? Can it be cut to size?

Ocushield blue light screen protectors for mobile phones and iPads are made of high quality tempered glass to protect both your eyes and screens. As you can imagine, cutting glass won’t work too well, so we don’t advise it. The screen filters for macbooks and monitors/laptops can be cut down if needed though - but be careful!

Will the Ocushield Blue Light Filter cause clarity issues?

Unlike other blue light filters, Ocushield won’t turn your screen a retro orange colour and keeps 95% clarity for a crystal clear picture. So unless orange is your favourite colour, you can enjoy blue light protection without any changes to your view.

How sturdy are the screen protectors?

Our screen protectors are made of tough, tempered glass, protecting your screens from chips and scratches. So not only do they protect your eyes, skin and wider health, but they’ll also help to keep your phone in tip top condition.

What are the correct dimensions for my MacBook?

To find the right size for your screen, we recommend that you measure it diagonally from each edge - from the top left corner down to the bottom right corner. You can then find the right size according to the measurements we provide.

Are the sticky tabs necessary for the MacBook and laptop screens?

The sticky tabs are essential for applying the filters to your MacBook or laptop screens. They allow you to apply the screen and to keep it fixed in place.

Do you have screens with infused privacy filters?

Yes, we have options with and without privacy filters, allowing you to work in peace and protect your eyes.

If I don't have the exact laptop size can I cut it down to size?

If we don’t offer the exact screen size for your laptop, monitor or PC, you can buy a larger size and cut it down to fit. We do recommend that you use a stanley knife for the best fit - and of course, be careful!!

Blue Light FAQs

What is blue light?

Blue light is a type of visible light on the electromagnetic spectrum, with wavelengths between 380 and 500 nanometres. It has more energy per photon than other visible light, which is why it is called high-energy visible (HEV) light. Blue light is naturally present in sunlight and plays an important role in regulating our circadian rhythms, alertness, and mood.

Why is blue light a concern?

The challenge isn’t blue light itself, but the way modern life has changed our exposure to it. Sunlight contains a balanced spectrum of colours, including red and infrared wavelengths that buffer the effects of blue. Artificial light sources such as LED bulbs, smartphones, tablets, and computer screens, however, emit concentrated amounts of isolated blue light. Too much exposure, especially at night, can confuse the body’s biological clock and strain the eyes.

How does blue light affect sleep?

Blue light strongly influences melatonin, the hormone that signals it’s time to sleep. Evening exposure from screens or bright LEDs suppresses melatonin release, making it harder to fall asleep and reducing sleep quality. Over time, this disruption can affect the body’s natural circadian rhythm, leaving you feeling less rested and more fatigued.

Can blue light damage the eyes?

Research shows that prolonged screen use contributes to digital eye strain, which includes symptoms like tired eyes, dryness, blurred vision, and headaches. Because blue light scatters more easily in the eye, it can make focusing harder, especially in low light. There is also emerging evidence that long-term exposure to high-energy blue light may add stress to retinal cells, though more studies are needed to fully understand these effects.

Is blue light always bad?

No. Blue light in the right context is actually beneficial. Morning exposure to natural sunlight helps regulate circadian rhythms, improve mood, and increase alertness. The issue is not blue light itself, but when and how much we are exposed to it—particularly from artificial sources after dark.

How can I protect myself from blue light?

You don’t need to avoid blue light completely, but you can reduce unnecessary exposure. During the day, take regular screen breaks and use natural daylight where possible. In the evening, try blue light blocking glasses, screen filters, or switch your devices to “night mode” to reduce blue wavelengths. Replacing bright white bulbs with warmer lighting at night also helps.

Who benefits from blue light protection?

Anyone who spends long hours in front of digital devices can benefit, especially office workers, students, and children. Blue light protection is also valuable for people who struggle with sleep, shift workers exposed to artificial light at night, or anyone sensitive to eye strain.