In 2017, during the launch of the iPhone X, Apple introduced its first smartphone with an OLED screen. In addition to offering better brightness and contrast quality, the OLED display is scientifically healthier to the eye compared to LCD screens. At least that was the result of researchers at the Tsing Hua National University (NTHU) in Taiwan who studied the dangers of white (bluish) light to the eyes, as reported by OLED-info.
In 2015, the researchers published a preview of these studies and asked the government to establish new laws to reduce the production of high-emission white-light screens. However, the problem does not end with the emission of these lights.
Much of the population looks at screens almost every day, on televisions, monitors, or smartphones. The important thing is not to replace all displays with a more beneficial technology, but to measure the consequences of each to quantify the threat of bluish lights to the eyes especially at night, during the production of sleep hormone. melatonin.
In this regard, the NTHU research group has developed a method for measuring and calculating these effects on human eyes. Basically, the test measured the MPE velocity for retinal inflammation after exposure to white light.
Among iPhones, tests revealed that the MPE of the iPhone XS Max was 20% higher than that of iPhone 7, which has an LCD screen. This means that while iPhone 7 took 288 seconds to affect the retina, iPhone XS Max took 346 seconds allowing users to look at the content longer without hurting their eyes. They did not specify, however, whether the iPhone XS Max True Tone feature was on or off during testing.
The iPhone XS Max screen also did not affect the sleep level of the user as badly as the iPhone 7. Thus, scientists measured the melatonin supply level of the iPhone XS Max and iPhone 7, which raised 20.1% and 24.6%, respectively (the higher the index, the lower the hormone production).
As the iPhone XR Not yet on the market, the researchers could not analyze the LCD screen contents of this device called by Apple Liquid Retina. We'll see how, in practice, the difference between Apple's up to the last generation LCD display (present in iPhones 8 and 8 Plus) and the new iPhone XR display.
via Cult of Mac