I've been having issues with my eyelids since I was a teenager, mostly because sometimes my right eye becomes really hard to open. So I turned to Opti-Fold, which was great for me to identify where my crease should actually be. After experimenting for a while and communicating with Ray (owner of Opti-Fold), I realized that manually tracing a lower crease helps my right eye to open. I've been doing that ever since, though it does require maintenance throughout the day. Definitely going to be turning to Opti-Fold if my crease becomes unstable again.