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Week 39 · Third Trimestermoderate

Vision Changes at 39 Weeks Pregnant

Mild vision changes are common during pregnancy due to fluid retention and hormonal effects on the eyes. However, certain vision changes — especially in the third trimester — can signal serious conditions like preeclampsia.

👶 What's Happening at Week 39

Your baby is now the size of a mini watermelon.

  • The baby is officially full term!
  • The brain has 30 billion neurons.
  • The chest wall is developed enough for effective breathing.

🔬 Why You're Experiencing Vision Changes at Week 39

  • Fluid retention causes corneal thickening and curvature changes
  • Reduced tear production causes dry eye syndrome
  • Increased blood volume and pressure changes affect ocular circulation
  • Gestational diabetes can affect the retina (diabetic retinopathy)
  • Preeclampsia can cause severe visual disturbances due to brain swelling

💊 Relief Tips for Week 39

1
Lubricating Eye Drops (Preservative-Free)Artificial tears help dry eyes — choose preservative-free formulations used more than 4 times daily.
2
Avoid Rubbing EyesRubbing irritated eyes worsens dryness and may cause corneal irritation.
3
Delay New Contact Lens PrescriptionsCorneal changes during pregnancy mean prescriptions often change temporarily. Wait until 6 weeks postpartum to update glasses or contacts.
4
Rest Your EyesReduce screen time and take breaks to reduce digital eye strain.

📋 Other Week 39 Symptoms

Intense Braxton Hicks or early labor contractionsPelvic pressureNausea or diarrheaRestlessness and anxietyBloody show
See full Week 39 guide →

⚠️ Call Your Doctor If…

  • Sudden blurry vision, especially in the second or third trimester
  • Seeing spots, floaters, or flashing lights
  • Double vision
  • Temporary loss of vision in one or both eyes

Frequently Asked Questions

Is blurry vision normal during pregnancy?

Mild blurriness from corneal changes is common and not dangerous. However, sudden or severe blurry vision — especially in late pregnancy — is a warning sign of preeclampsia and requires immediate evaluation.

Can pregnancy permanently change my vision?

Most vision changes are temporary and resolve within weeks to months after delivery. Avoid updating your prescription during pregnancy for this reason.

What do flashing lights or spots in vision mean during pregnancy?

Seeing flashes, spots, or floaters — especially with headache or swelling — is a warning sign of preeclampsia or severe hypertension. Call your provider or go to the ER immediately.

Can I wear contact lenses during pregnancy?

Many women find contacts less comfortable during pregnancy due to dry eyes and corneal changes. Daily disposables are often more comfortable. Avoid wearing them during episodes of blurriness or discomfort.

Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice. Always consult your OB/GYN or midwife about symptoms during pregnancy.