The Problem We See

You spend ten hours a day in front of a glowing rectangle. You trust it with your work, your entertainment, your children’s education. But you have no idea how much light it is actually throwing into your eyes.

The world of light measurement is broken. It is locked behind $2,000 spectroradiometers, cryptic ISO documents, and the assumption that only engineers need to know if a display is too bright or a desk lamp is too dim. Meanwhile, 90% of digital device users report symptoms of Computer Vision Syndrome — yet the tools to prevent it remain in the hands of a few.

Standards exist. ISO 8995-1 defines the precise illuminance levels for indoor workplaces. CIE S 008 harmonizes lighting for visual tasks. GB 40070 protects children’s eyes in China. But these documents gather dust on shelves because the average person cannot measure light without a degree in photometry.

“The problem is not that we lack standards. The problem is that we lack access to them — and the tools to enforce them in our own lives.”

HDR gaming looks wrong because nobody calibrates. Desk lamps cause eye strain because the ratio between screen and background exceeds the recommended 60:1. Children develop myopia because their homework lighting falls below the 200 lux minimum. We are living in a world of light that was designed for machines, not for human eyes.

What We Believe

We believe that every person who stares at a screen for eight hours deserves to know their exact nit level. Not in a vague “brightness slider” sense — but in the precise, reproducible units that ISO 9241 demands for workplace safety.

We believe that ISO 8995-1 exists for a reason — and it should take ten seconds to check compliance, not require an engineer with a $2,000 tool. The standard says vertical illuminance at the eye should be between 200 and 500 lux. Why should that knowledge be reserved for lighting consultants?

We believe that luminance contrast — the difference between a white pixel and a black pixel — is the single most important factor in visual fatigue. Research proves that contrast ratios above 8:1 reduce comfort. Yet every smartphone, laptop, and monitor ships with default settings that blast past that threshold.

“We believe that measurement is not a luxury. It is a right. The right to know what your eyes are enduring every single day.”

We believe that the blue light peak shift from 447 nm to 458 nm can reduce visual fatigue — but only if you can measure it. We believe that melanopic EDI matters for circadian health, and that the VDT screen contributes more to eye-level light exposure than the entire room behind it. The science is clear. The tools are not.

The Bridge: From Standards to Pocket

We read ISO 8995-1, CIE S 008, and GB 40070 so you don’t have to. We turned 200 pages of technical specifications into a five-second measurement on the device you already carry — your iPhone.

This is not about hardware. This is about access. The iPhone’s sensors are already capable of astonishing precision — they just needed software that understood the standards. We built that software. We call it NItMeter, LuxMeter, and HDR. But those are just names. What they really are is a bridge between the lab and your life.

When you measure your screen with NItMeter, you are not just seeing a number. You are seeing whether your display meets EN ISO 9241-306 luminance uniformity requirements. You are checking if the screen-to-background luminance ratio stays below 60:1 — the threshold that research says prevents eye strain during prolonged VDT work.

When you measure ambient light with LuxMeter, you are verifying that your desk achieves the 200–500 lux recommended for visual tasks. You are ensuring that your evening screen time stays within the 20.63–75.15 cd/m² range that minimizes fatigue. You are turning abstract standards into actionable habits.

“We did not invent light measurement. We democratized it. We made the invisible visible — and the incomprehensible, instant.”

The science is not new. What is new is that you can finally use it. Without a degree. Without a lab. Without a $2,000 instrument. Just your pocket, your phone, and the will to see clearly.

The Future We're Building

Imagine a world where no child develops myopia from bad desk lighting — because every parent can check lux levels in seconds. Where no gamer sacrifices eye health for ray tracing — because they know their screen luminance is within the optimal range. Where display calibration is as normal as checking the weather.

Imagine open-plan offices where wall luminance is not an afterthought but a design parameter — because research shows that non-uniform walls at 200 cd/m² reduce preferred desk illuminance, saving energy while improving satisfaction. Imagine a world where EN 12464-1:2011 is not just a compliance checkbox, but a daily reality for every worker.

Imagine evening routines where your phone automatically adjusts to the 13.08–62.16 lux ambient range that research recommends — because the sensor in your pocket can measure it, and the software in your pocket can act on it.

“We are building a future where light is no longer a hidden variable — but a transparent, measurable, optimizable part of every environment you inhabit.”

This future does not require new hardware. It requires a new mindset. It requires the belief that you deserve to know — and the tools to act on that knowledge. EYEIO is that tool. But the movement is bigger than any product. It is the recognition that light measurement is not a niche technical discipline. It is a basic human need — like knowing the temperature before you step outside.

The Invitation

This is not a call to buy. This is a call to measure. To question the assumptions that have governed your screen time. To ask: “Is my light working for me — or against me?”

We invite you to join a movement of people who refuse to accept poor light as normal. People who understand that ISO 9241-306 is not a bureaucratic burden — it is a recipe for comfort. People who know that 200 lux at the desk is not a luxury — it is a minimum standard for safe work.

We invite you to become a light literate citizen. To measure your screen. To check your desk. To show your children what healthy light looks like. To demand that every environment you inhabit — office, home, school — meets the standards that science has already defined.

The tools are in your pocket. The knowledge is in this manifesto. The rest is up to you.

Measure light. Not because you have to. Because you deserve to see clearly.