Is it dangerous to use additional car mirrors, such as convex or panoramic mirrors, to help you drive more defensively?

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Using extra mirrors increases your field of view and helps you notice cars in adjacent lanes or other road users you might miss with only standard mirrors. This supports defensive driving by giving you earlier awareness before changing lanes or merging. They should augment your regular checks, not replace them, because some mirrors can distort size or distance and require you to adjust your scanning habits. With proper adjustment and practice, they can improve safety; misuse or overreliance can lead to misjudging gaps, which is why they’re a helpful aid rather than a standalone solution.