By default, the human pupil changes size depending on the amount of light in the environment: when there is a lot of light, it contracts and becomes narrower, and when it’s dark, it dilates to allow more light to get in.
The human pupil is the gateway to the retina: through it, light reaches the eye. The Human Pupil Is Sensitive to the Amount of Light In order to understand how, let’s briefly review some basic information about the eye pupil and how it reacts to the amount of light in the environment. But the amount of light in the environment influences not only power consumption, but also our perception. Negative contrast polarity (dark mode) denotes the combination of light (e.g., white) text on dark (e.g., black) background.ĭark-mode displays emit less light than light-mode ones (and, because of that, they might extend battery life).Positive contrast polarity (light mode) refers to dark-font text on light background.I will share these findings with you.īut first, let’s make sure we’re all on the same page by defining some vocabulary.ĭefinition: Contrast polarity is a term used to describe the contrast between the text and the background: However, these questions prompted me to do a review of the academic literature on whether dark mode has any benefits for users - with normal vision or not. I must say upfront that NN/g has not done its own research on dark mode. It’s a question that I also got several times from attendees to our UX Conference. Recently, spurred by the introduction of dark mode in IOS 13, a reporter asked me to comment on the usability of dark mode and its popularity as a design trend.
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