During pregnancy, it will changes in hormones, metabolism, fluid retention, and blood circulation can all affect your eyes, thus further changes your vision. If you find your vision changes during pregnancy, please not change new prescription glasses because your vision will recover after you give birth to your baby. So, you shall ask advices from eye doctor and maybe get prescription glasses temporarily.
Some pregnant women may feel their vision getting worse during pregnancy. It is because changing in hormones, metabolism, fluid retention, and blood circulation may affect thickness and curvature of the cornea of your eye resulting in decreased vision. Some women may also experience blurry vision or black spots in eyes. If it is quite serious, seeing a doctor immediately is much necessary.