I also check if the store explains how to measure PD and frame size clearly. When it comes to eyewear, the small details really matter over time. I also started paying attention to how websites display sizing charts for clothing. I enjoy reading threads where people honestly share what worked and what failed for them.
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:
visit this page
(https://www.comarcasinteligentes.es/blog/index.php?entryid=55559)
A simple and honest answer like 鈥渨e do not have that option鈥?is better than marketing fluff. For fashion and clothing I pay attention to fabric thickness and stitching details. Whenever I find something that actually works well, I tend to reorder it later. I am still learning and testing different brands and styles over time. I recently tried a few different online shops and wanted to share my experience. If you sit in front of a screen for many hours, these small features make a difference. The same is true for metal versus acetate frames for glasses.
Maybe this is useful for someone.