Myopia Profile


Does pregnancy influence myopia?

Posted on May 20th 2020 by Connie Gan

In this article:

Does pregnancy change eyesight? This clinical case details a woman whose myopia reportedly onset with pregnancy, with adult myopia progression since.

HWN presented this case involving a 32-year-old woman whose myopia onset after having her first child and had progressed since. So, the question to the Myopia Profile community was, “Does pregnancy have anything to do with adult-onset myopia?"

HWN Hey all, I have a 32yo female who says she had no script until she gave birth around 26 years of age. Two year old glasses are -1.50 and -1.25. She is now -2.25 and -1.25. Associations with pregnancy and myopia? Hormones that relax everything and makes everything wider to assist childbirth (things you learn during conversations with friends)? At this stage I've said no studies in regards to myopia management in this age group, however we are tempted by Orthok, she wants to be glasses free. Thoughts? Thanks! HWN Just did a cyclo confirmation. The myopia and 1D difference between the two eyes is definitely there. No peripheral retina changes…

What are the considerations?

EC I would probably do a full BV work up especially with only one eye going up so significantly.PC …I would probably do a cyclo first and AXL would help determine if any axial elongation is taking place or if it’s just corneal/accommodation changes.JK Screen time and BV status would be interesting to explore further.😊

The community have suggested that cycloplegic refraction and binocular vision tests are needed as one eye was shown to progress more than the other. This is useful to rule out refractive error changes due to accommodative function.

As the patient expressed the desire to be glasses-free, Ortho K and soft multifocal contact lenses were suggested. As there are currently no studies looking into the efficacy of myopia control strategies in adult age groups, it is important that the patient understands that the purpose of fitting Ortho K is to primarily provide clear vision, with any myopia control effects being a bonus.

How common is adult-onset myopia and progression?

The studies on adult onset myopia are limited, with one finding that one-third of myopia commenced in adulthood in a Caucasian twin population. Myopia reported in that study was low to moderate.2

Adult myopia progression, though, is quite common. The longest follow up on this is a series of studies from Finland, which showed that mean myopia progression in the 20's decade was -0.45 D ± 0.71 (SD): in 45% of cases, progression was ≥0.5 D and in 18% of cases, myopia increased by ≥1.00 D.3

AT Thickened cornea during pregnancy, they usually return post delivery though. (Reference: Naderan 2018 – see below)EC …From personal experience, hormonal changes can cause some myopic shift but not that significant and may not affect everyone.OW Fluid retention (corneal curvature and thickness changes???) Hormonal changes…EH …I’ve had a couple where there Vision has gone off in pregnancy (often they do recover but clearly not in this case)…

According to some studies, some pregnant women may experience a myopic shift during their pregnancy, possibly due to changes in corneal thickness or lens curvature.4,5 In such cases, refractive error tends to return to pre-pregnancy level after delivery.5,6 On the other hand, another study suggests that pregnancy is inversely associated with myopia progression, whereby pregnant women are less likely to progress than their non-pregnant counterparts.7

Pregnancy can also lead to contact lens intolerance due to dry eye problems caused by disruption of lacrimal acinar cells.4 Therefore, spectacles may be a better option in such cases during pregnancy.

These ocular changes usually resolve in postpartum. Both contact lens and spectacle option are acceptable options, depending on the mother’s preference. Consider with a mother of an infant that she will need to wake up during the night to feed the baby, so the practicalities of Ortho K may not suit.

SAN My thoughts are too much screen time whilst breastfeeding 🤱BY I'll 2nd the screen time while breast feeding and holding the baby. I told her to go buy a TV to watch her dramas but she continued and it got worse…WH Excessive screen time in dim/dark room do damage your eyes! (Personal experience) have you consider daily disposable contact lenses? 😜EC My first thought was too much screen time whilst feeding! And possibly in the dark too. 😞…

Some from the community surmised that the myopic progression could potentially be attributed to the increased screen time whilst breastfeeding. This is a possibility as frequent near work at close distances is identified to be a risk factor of adult myopia progression.

In this case, however, it's important to note that the patient reported myopia onset after pregnancy, and progression in the six years since. The immediate influence of hormonal changes, potential screentime while breastfeeding and even concerns of fitting Ortho K to a mother of an infant are unlikely factors in this case. Hence the interesting aspects of this case are firstly the influence of pregnancy in onset, and the best choices to attempt to manage young adult myopia progression.

Take home messages:

  • It is not uncommon for refractive error and contact lens tolerance to change during pregnancy. Pregnancy-induced changes tend to resolve spontaneously after delivery. Therefore, it is important to ensure that a pregnant patient has functional visual acuity, keeping in mind that any changes may return to pre-pregnancy levels postpartum.
  • Preference for spectacle or contact lens treatments may change during pregnancy and postpartum due to changes in the mother’s ocular physiology (e.g. pregnancy-related dry eyes) and lifestyle (e.g. waking up in the middle of the night).
  • It is important to communicate the lack of evidence on the efficacy of current myopia control strategies in adult myopia progression. Contact lens options are likely going to be the best choice for adult progressing myopes to correct vision, while potentially controlling myopia progression.
  • Young adult myopia progression does occur - by around 0.50D on average across the decade of the 20s, but in around 20% of young myopes this progression could be more than 1D.
  • When in doubt, cycloplegic refraction and axial length measurements can help corroborate your findings and rule out accommodative involvement in myopia progression.

Meet the Authors:

About Connie Gan

Connie is a clinical optometrist from Kedah, Malaysia, who provides comprehensive vision care for children and runs the myopia management service in her clinical practice.

Read Connie's work in many of the case studies published on Connie also manages our Myopia Profile and My Kids Vision Instagram and My Kids Vision Facebook platforms.

About Kimberley Ngu

Kimberley is a clinical optometrist from Perth, Australia, with experience in patient education programs, having practiced in both Australia and Singapore.

Read Kimberley's work in many of the case studies published on Kimberley also manages our Myopia Profile and My Kids Vision Instagram and My Kids Vision Facebook platforms.

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