Can Pregnancy Affect My Vision?

Short answer: Yes. Pregnancy causes hormonal and physiological changes that can temporarily alter vision in several ways — including prescription changes, increased dry eye, and worsening of contact lens tolerance. These changes are generally temporary and resolve after delivery (and cessation of breastfeeding). LASIK and other elective vision correction procedures should not be performed during pregnancy or while breastfeeding.

This is an important topic within the broader context of Eye Health and Vision Care. Here is what expecting and breastfeeding patients need to know.

Hormonal Effects on Refraction

Pregnancy hormones — primarily estrogen and progesterone — cause generalized fluid retention and changes in corneal curvature and thickness. The cornea may become slightly thicker and steeper during pregnancy, temporarily shifting the refractive error. This means:

A patient who was stable at -3.50 D before pregnancy might measure at -4.00 D during the third trimester
Contact lenses that fit well before pregnancy may fit less comfortably or provide less accurate correction
Glasses prescribed during pregnancy may not provide the same correction after delivery

These changes are generally temporary. Most women find their prescription returns to its pre-pregnancy baseline by six to twelve weeks after delivery (or after cessation of breastfeeding, since hormonal changes continue during lactation).

Dry Eye During Pregnancy

Hormonal changes during pregnancy — particularly changes in estrogen, progesterone, and androgen levels — alter tear film composition and production. Many pregnant women experience worsened dry eye symptoms, particularly during the second and third trimesters. This includes:

Reduced tolerance for contact lenses
Burning, gritty, or fluctuating vision
Increased sensitivity to environmental irritants

Preservative-free artificial tears are safe during pregnancy and can provide significant relief. Omega-3 fatty acid dietary intake (from dietary sources like salmon and sardines) may support tear film quality and is safe in appropriate amounts. For the full picture of dry eye management, see dry eye syndrome and vision correction surgery.

Contact Lens Comfort and Fit During Pregnancy

The corneal changes during pregnancy can alter the fit of both soft and rigid contact lenses. Symptoms include:

Lenses feeling tighter or more uncomfortable than before
More frequent lens awareness or irritation
Dryness that was not present before pregnancy

Many women find switching to more frequent replacement (daily disposables if not already using them) or taking breaks from lens wear more comfortable during pregnancy. If significant discomfort develops, glasses are a perfectly appropriate temporary solution.

Pre-Eclampsia and Vision

Pre-eclampsia — a pregnancy complication characterized by high blood pressure and organ damage — can cause visual symptoms that are not the same as the gradual hormonal changes described above. Visual symptoms that can occur with pre-eclampsia include:

Blurring of vision
Flashing lights or visual disturbances (scotomas)
Double vision
Sudden vision loss

Any sudden or significant vision change during pregnancy should be reported to an obstetrician immediately. These symptoms, in the context of pregnancy, are potential indicators of pre-eclampsia and require urgent evaluation.

Diabetic Retinopathy and Pregnancy

Women with pre-existing diabetes can experience significant worsening of diabetic retinopathy during pregnancy. The metabolic and hemodynamic changes of pregnancy can accelerate retinopathy progression. Standard recommendations include a dilated retinal examination in the first trimester of pregnancy in any woman with diabetes, with monitoring throughout gestation.

LASIK and Pregnancy: Wait

LASIK, PRK, and other elective vision correction procedures should not be performed during pregnancy or while breastfeeding, for several reasons:

1. Prescription instability: The corneal and refractive changes of pregnancy mean the prescription at the time of surgery will likely not represent the true long-term post-pregnancy prescription. Surgery performed on a temporarily shifted refraction will produce a result that drifts after delivery.

2. Medication safety: Medications used in the perioperative period — topical anesthetics, antibiotics, anti-inflammatory drops — have not been established as safe for pregnancy or breastfeeding. Avoiding any unnecessary medication exposure is the conservative standard.

3. Healing: The physiological changes of pregnancy may affect wound healing in unpredictable ways.

The standard recommendation is to wait until at least three months after delivery for non-breastfeeding patients, and until at least three months after cessation of breastfeeding for nursing mothers — and to confirm that the prescription has returned to its pre-pregnancy baseline before proceeding.