The Client on Prescribed Lash Serum With Ten Lashes a Day Shedding
Nadia, 47, books a classic full set as a new client. During intake she says she has applied a prostaglandin-analogue lash serum (bimatoprost 0.03%), prescribed by her ophthalmologist, along her upper lid margins every night for seven months. Under the magnifier you note: her upper lashes are noticeably longer and darker than in the year-old photo she shows you; there were no lashes along the lower lid margin in that photo, but three fine lashes now emerge about 2 mm below the left lower lash line; the skin above her eyes looks hollowed and darker, which she says 'makes me look tired'. She reports losing 'maybe ten lashes a day' and worries extensions will speed that up. The lids are otherwise quiet: no redness, no crusting, no tenderness, no swelling. She wants 'as full as possible' coverage on the outer corners, where her natural lashes are shortest and finest.
1. Is a loss of about ten lashes a day abnormal, and how would you explain the lash growth cycle to her?
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The lash cycle has three phases, and each follicle runs on its own schedule, which is why a full set never sheds all at once. Anagen is growth, roughly 30 to 45 days. Catagen is a 2 to 3 week transition when growth stops and the follicle retracts. Telogen is a resting phase of about 100 days, ending when the new lash pushes the old one out. At any moment roughly 90% of upper lashes are in anagen, so a small daily loss is normal, commonly quoted at one to five lashes a day, and it is entirely normal for an extension to come away attached to a telogen lash. Ten a day, every day, sits at or above the top of the usual range, so I would not dismiss it. It is not my role to diagnose why: the serum is one confounder, and thyroid disease, iron deficiency and postpartum shedding are others. I would document the count, ask her to track it for six to eight weeks, and refer to her GP or the prescribing ophthalmologist if it continues or bald patches appear.
2. What do the changes to the skin around her eyes and to her iris suggest, and what is your scope of practice in addressing them?
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These are recognised effects of prostaglandin analogues such as bimatoprost, and they are precisely why the prescriber monitors patients on them. The hollowed, darker-looking orbital area is attributed to prostaglandin-associated periorbital fat atrophy. Iris darkening occurs because the drug increases melanin within iris melanocytes; it is usually permanent and often uneven, which fits the darker ring she has in the left eye only. Longer, thicker, darker and more numerous lashes, including lashes appearing outside the normal lash line, is hypertrichosis. I must not diagnose, must not tell her to stop the drops, and must not let her believe the extensions caused any of it. What I do is describe what I can see in neutral language, note that these are known effects her ophthalmologist is best placed to discuss, and record that she reports being monitored. The three new lashes below the lash line matter for a second reason: if they emerge from the meibomian gland openings they may be distichiasis, which needs medical assessment and must not be lashed or pulled.
3. Do you proceed with the appointment today, and how does the serum change your application plan?
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On the lid findings alone there is no reason to postpone. The lids are quiet, with no redness, crusting, tenderness or swelling, so there is no active infection or inflammation to work around. The serum does change my plan. It leaves residue on the lash shafts that interferes with adhesion, so I cleanse the lashes with a lash shampoo, rinse thoroughly and make sure they are completely dry before mapping. I keep the bond 0.5 to 1 mm from the skin so no adhesive touches the lid, and I use a small bead rather than a heavy deposit near the follicle. I will not extend the three anomalous lower lashes. For the sparse outer corners I would rather use slightly shorter, lighter extensions in a curl that lifts than try to fake density with long, heavy ones. I would also set expectations honestly: an extension on a telogen lash leaves with it, so some early loss is normal and is not the extensions 'pulling her lashes out'.