As our own eyelashes shed every day, if a client has a very full
set, ie 100/120 lashes per eye, in theory she could lose 2-5 ish a day.
However, my general guidelines to clients is that their lashes should stay looking salon perfect for 2 weeks, then as they move into week 3, they may start seeing some loss of volume. Clients then come in at 3 weeks for infill.
If a client loses lots in the first 1-2 days, they have normaly got them wet within 24 hours. hth xx