We’ve had a lot of inquiries about mouth mirrors and have previously conducted related tests with great feedback. The conclusion is that expensive mirrors are generally better, but the price difference between expensive and cheap ones is enormous—sometimes hundreds of times. While expensive mirrors can be sterilized and reused, we found during long-term use (around three months) that, even when individually packaged, many small scratches appear on the mirror surface, affecting visibility.

With a meticulous approach, we first used the mouth mirrors for a period of time before conducting this evaluation. As with previous tests, we compared several mirrors for their observation range, water retention, and anti-fog properties. All the mirrors used this time were brand new, and interestingly, they all looked quite similar. In terms of workmanship, mirror number 2 felt the worst.

Since we tested fewer products this time, we adopted a round-robin approach. After a head-to-head comparison between mirror 1 and mirror 2, the winner was then compared with mirrors 3 and 4. The evaluation was based on three criteria: observation range, fogging, and water retention. We didn’t assess clarity due to the difficulty of capturing differences in photos, though there were some visible differences to the naked eye. For observation range, mirrors 1 and 3 were basically the same, mirror 2 was slightly smaller, and mirror 4 had the largest observation range due to its larger size.

Based on several people’s observations, mirror 4 had relatively better clarity. Mirror 1’s clarity wasn’t as good as the expensive mirrors, but it was sufficient for general use. Regarding fogging and water retention, here are the results of our tests. Mirror 1 was significantly better at preventing fog. Please see the test video below.

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