Dangers of Lash Extensions and Lash Perms
Risks of Eyelash Extensions
According to the AAO, the primary risks of lash extensions include trauma to or infection of the eyelid or cornea. Extension fibers can poke the eye surface during application or wear, scratching the cornea. Bacteria trapped between the extension and the natural lash multiply in the warm, moist environment of the eyelid, causing infections that range from mild conjunctivitis to serious corneal ulcers.
According to the AAO, extension adhesives may contain formaldehyde, a known allergen. Allergic reactions cause pain, itching, redness, swelling, and temporary vision interference. The reaction can appear during the first application or develop after repeated exposure over months. Once you become sensitized to the adhesive, every future application triggers a worse response.
According to the AAO, rubbing, tugging, or pulling at extensions can fracture natural lashes and cause permanent damage to the lash follicle. The weight of heavy extensions strains the follicle over time. Repeated fill appointments compound this stress. Some patients develop traction alopecia (hair loss from sustained pulling) that leaves gaps in the lash line.
According to the AAO, lash extensions tend to harbor bacteria and foreign matter, increasing the risk of blepharitis (eyelid inflammation). Extensions make it harder to clean the lash line, so dead skin cells, oils, and cosmetic residue accumulate. This buildup feeds bacterial growth and blocks the meibomian glands that keep your tear film healthy.
Risks of Lash Perms and Lifts
Lash perms use chemical relaxants and setting solutions to curl or lift natural lashes. If these solutions drip or seep into the eye during the procedure, they can cause chemical burns on the cornea and conjunctiva. Even brief contact with the eye surface produces pain, redness, tearing, and potential corneal damage.
The chemicals in perm solutions can cause allergic reactions on the thin eyelid skin. Swelling, redness, and peeling of the eyelid may develop hours to days after the procedure. Some patients experience worsening reactions with repeated treatments as their immune system becomes more sensitized.
Chemical processing weakens the structure of your natural lashes, making them brittle and prone to breaking. Over-processing (leaving the solution on too long or using too strong a formula) can dissolve the lash shaft. Damaged lashes may take several growth cycles (two to four months) to replace.
Magnetic Lashes Carry Their Own Risks
According to AAO guidance (2022), magnetic eyeliner used with magnetic lashes carries risk of corneal scratching and periorbital irritation. Small magnet fragments can dislodge and contact the eye surface. If a magnet chip scratches your cornea, you may develop a corneal abrasion that requires treatment with antibiotic drops.
The AAO notes the potential for corneal iron deposition from magnet fragments that contact the eye over repeated use. Iron particles embedded in the cornea can cause localized staining and irritation. Your eye doctor can detect iron deposits during a slit-lamp examination.
If you have magnetic lash liner on during a medical emergency requiring an MRI, the metallic particles near your eyes can create artifacts on the scan or cause discomfort. Remove magnetic lash products before any MRI. In an emergency, inform the medical team about magnetic products near your eyes.
No FDA Oversight
According to the AAO, eyelash extensions and their adhesives are not currently regulated by the U.S. FDA. No pre-market safety testing is required before these products reach consumers. The adhesive ingredients, extension materials, and application techniques vary widely between salons with no federal quality standard.
Licensing requirements for lash technicians differ by state. Some states require cosmetology licenses; others have minimal or no requirements. The skill of your technician directly affects your safety. Improper application techniques increase the risk of corneal scratches, allergic reactions, and lash damage.
Shared tools, reused adhesive, and unsanitary workspaces increase infection risk. Bacteria, viruses, and even lice can transfer between clients. You should see individually packaged extension fibers, fresh adhesive, and sterilized tools at every appointment.
Reducing Your Risk
Select a technician with documented training in eyelash extension application. Ask about the adhesive ingredients and whether the products have been tested for the eye area. A reputable technician uses individually packaged supplies and works in a clean, well-lit environment.
Request an adhesive patch test at least 24 hours before your first full application. The technician applies a small amount of adhesive to your inner wrist or behind your ear. If redness, itching, or swelling develops, you are likely allergic to a component of the adhesive and should not proceed.
Avoid rubbing or pulling your extensions. Clean your lash line daily with an oil-free cleanser recommended by your technician. Watch for redness, swelling, pain, or discharge after each appointment. If any symptoms develop, remove the extensions (or have them professionally removed) and see your eye doctor.
When to See Your Eye Doctor
Seek immediate care for eye pain, vision changes, redness, or discharge following extension application or a lash perm. Your eye doctor can check for corneal damage, flush out chemicals, and start treatment before permanent harm occurs.
Chronic redness, crusting, or swelling along the lash line after repeated extension use may indicate blepharitis or meibomian gland dysfunction. Your eye doctor can evaluate your glands and recommend a treatment plan that may include temporarily stopping extensions.
If your natural lashes have not regrown within three to four months after removing extensions, see your eye doctor. Permanent follicle damage or an underlying medical condition may be the cause. Your doctor can examine the follicles and recommend treatment options.
Lash Extension and Perm Questions
Most technicians recommend fills every two to three weeks. Waiting longer causes the remaining extensions to twist and pull on weakened natural lashes. Taking a break of at least one month after every three to four fill cycles lets your natural lashes recover.
You can, but the combination increases risk. Extension fibers can scratch or dislodge a contact lens. Adhesive fumes during application can irritate the cornea under a contact lens. Remove your contacts before the application appointment and wait until any adhesive fumes have fully dissipated before reinserting them.
Lash lifts avoid adhesive and extra fibers, reducing some risks. However, the chemical solutions used in lifts can burn the cornea and damage natural lashes if applied incorrectly. Neither procedure is risk-free. Lifts may be a lower-risk option if performed by an experienced technician.
Oil-based mascara can dissolve extension adhesive and cause premature shedding. If you want additional volume, use only water-based, extension-safe mascara recommended by your technician. Apply it to the tips rather than the base of the extensions to avoid adhesive breakdown.
Flush your eye with clean water or preservative-free saline. Do not rub your eye, as this can push the fiber into the cornea. If the fiber does not flush out or if you have pain, redness, or blurry vision afterward, see your eye doctor to check for a corneal scratch.
Yes, in some people. Extensions make lid hygiene harder, leading to meibomian gland blockage and reduced oil in the tear film. The adhesive itself can irritate the lid margin. If you develop dry eye symptoms during extension use, your eye doctor can evaluate whether the extensions are contributing and recommend adjustments.
Keep Your Lashes and Eyes Healthy
If you choose lash extensions or perms, select a trained technician, request a patch test, and clean your lash line daily. See your eye doctor promptly for any pain, redness, or vision changes after a lash procedure.