Eli5: what are the black dots around the edge of a car window? What are they called and what do they do?
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The dots are a form of tint, to give a soft visual edge to the windshield. Makes it less noticeable to you that you’re looking through a window. Older cars achieved this by using an actual gradient, faded tint in the top edge of the glass. The dots are a cheaper way to do this because they already apply black coating around the edge to hide the unsightly glass adhesive, it’s cheaper to just use this same coating to make a faded soft visual edge. Older cars had metal or plastic trim that hid the adhesive from view.
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