What Does the Evidence Say? Scientific Honesty First
There are reports of corneal shape change during pregnancy and small studies suggesting possible effects — but they are small and inconclusive, and cannot support the claim that pregnancy accelerates the disease in every patient. Hormonal changes may theoretically affect corneal biomechanics, but causation is unproven. Decisions are therefore built on documented measurements of each eye before, during and after pregnancy — not on general anxiety.
Practical Monitoring Plan
| Timing | Action |
|---|---|
| Before pregnancy (if possible) | Full documentation: Pentacam, visual acuity, corneal thickness — as a comparison baseline |
| During pregnancy | Periodic examination and imaging if vision changes; same-device comparison |
| Noticeable change | Individual assessment: real change or temporary (tears, dryness, lenses)? |
| After delivery and breastfeeding | Full re-assessment, then discuss cross-linking if real progression is proven |
Cross-Linking During Pregnancy: Deferral Is the Default
Cross-linking is elective in timing in most cases, and its safety evidence during pregnancy is insufficient — so it is generally deferred. The only discussable exception is rapidly documented progression threatening the cornea, decided individually with the eye doctor and obstetrician together. See: full cross-linking guide.
LASIK and Vision Correction During Pregnancy and Breastfeeding
- LASIK and femto-SMILE are not advised during pregnancy or breastfeeding because of possible hormonal effects on the cornea and refraction.
- Even LASIK assessment visits are postponed until the situation stabilises after breastfeeding.
- Updated glasses and contact lenses are the safe temporary solution — lens guide.
FAQs
I have keratoconus and plan pregnancy — what should I do?
Document your corneas now with a full Pentacam, discuss a monitoring plan with your doctor, and do not postpone pregnancy out of fear of unproven inevitable worsening.
My vision weakened during pregnancy — is that progression?
Not necessarily; dry eye and tear changes are common in pregnancy and affect measurements. Examination and imaging decide.
Does breastfeeding affect the cornea?
No strong evidence of direct harm, but hormonal changes continue — so LASIK and elective cross-linking wait until afterwards.
Can I use eye drops during pregnancy?
Some drops are safe and some are forbidden — never use an old prescription without checking with your doctor.
Selected references: Bilgihan K et al. Pregnancy-induced progression of keratoconus. Cornea. 2011;30(9):991–994. · Gomes JAP et al. Global consensus on keratoconus and ectatic diseases. Cornea. 2015;34(4):359–369.
Related topics
Author: Prof. Dr. Amr Said — Assistant Professor of Ophthalmology, Faculty of Medicine, Alexandria University. Published November 2026. Last medical review: November 2026. Educational content; not a substitute for individual assessment.
Prof. Dr. Amr Said Cornea & Refractive Surgery Clinic
Prof. Dr. Amr Said — Assistant Professor of Ophthalmology, Faculty of Medicine, Alexandria University; consultant in corneal and refractive surgery, keratoconus treatment and cataract surgery.
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