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I also check if the store explains how to measure PD and frame size clearly. Many times I avoided a bad purchase just by reading a few careful comments. I am still learning and testing different brands and styles over time. Nobody wants pretty shoes that hurt after ten minutes of walking. It is interesting to see how different people value different aspects of a product.

If anyone is interested in real user experiences, I sometimes write short notes about the shops I test.
You can find one of the pages here:

see more details


On the other hand, a well made pair of glasses can last a long time and feel comfortable all day. Comfort around the heel and toes is more important than super fancy design. Sometimes I even measure an existing frame with a ruler before ordering anything new. Jewelry is another category where quality can be very different from photos. In the end it is all about finding what matches your own habits and lifestyle.

Hope this helps someone.