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Originally Posted by ProDigit
Not really true.
There are 2 scenarios where Night mode makes sense:
1- Using e-ink books in normal day mode (same like reading a book) in bright outside sunlight, is very damaging to the eyes.
There is too much light hitting your eyes, and may cause temporal blindness.
For that matter, when you have a high intensity light source, it's better to use night mode.
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Do you have any links to studies supporting your statement? The closest I can were lists of urban myths about reading which included reading in daylight. One sample is quoted below.
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Below we debunk some of the most common myths related to reading and vision:
Reading in low light or in the dark will weaken your eyesight – When we’re young we’re told not to read in the dark because it will damage our eyes. Well, for those of us that used to hide under the blankets with a flashlight, it may have caused minor eye strain, but no permanent damage.
Reading while wearing glasses will make your eyes more dependent on them – Because you’re getting used to seeing more clearly while wearing eyeglasses or contacts, it may make your vision seem worse when you’re not wearing them. But rest assured, it has no negative effect on your eyesight.
Reading in direct sunlight can be dangerous – Any activity done in the sunlight can cause UV damage. Be sure to wear UV-blocking sunglasses and a wide-brimmed hat.
Reading smaller print can damage your eyes or wear them out – Though reading in a fine print may cause eye strain, there is no evidence that doing so will damage the eyes. If eye strain’s got you down, try purchasing books with larger print, or using a digital tool, such as a tablet or e-reader that allows you to change the font size. (But if you are reading on a digital device, make sure you’re following the 20/20/20 rule for screen use!)
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You will notice that they cautioned about UV from daylight but that reading in daylight is innately damaging to your eyes is an urban myth. Perhaps you are thinking about photokeratitis aka snow blindness when your corneas get sunburned. Often associated with snow since snow does reflect up to 85% of incident UV. Also know to welders as flash blindness.
BTW, thanks for the chuckle when I read "temporal blindness".