A Minnesota teacher’s experience with sudden blindness during pregnancy sheds light on the risks of diabetes-related eye damage and underscores the importance of regular screening for expectant women with diabetes.
Kristin’s sudden blindness during her second pregnancy was not a mystery to her doctors so much as a frightening example of how diabetes can turn pregnancy into a high-risk period for the eyes. The Minnesota teacher already had diabetic retinopathy, a condition in which high blood sugar damages the tiny blood vessels in the retina, and she woke from a nap in her first trimester unable to see clearly. According to the Mayo Clinic and the US Centers for Disease Control and Prevention, diabetic retinopathy can progress silently before causing blurred vision, floating spots or even blindness, which is why regular eye exams are central to diabetes care.
Pregnancy can intensify that danger. As the body produces more blood and circulation changes to support the fetus, weakened retinal vessels may be placed under extra strain. The National Institute of Diabetes and Digestive and Kidney Diseases says women with pre-existing diabetes face a higher risk of rapid progression of eye disease during pregnancy and may need more frequent examinations. A 2022 systematic review in JAMA Ophthalmology found that progression remains a concern in pregnant women with diabetes despite modern treatment, reinforcing the need for close monitoring throughout pregnancy.
In Kristin’s case, the problem became acute after a severe coughing illness the week before her vision collapsed. Ophthalmologist Geoffrey Emerson of Retina Consultants of Minnesota determined that blood had filled the vitreous, the gel-like substance inside the eye, blocking her sight. That complication, known as a vitreous haemorrhage, can occur when fragile retinal vessels leak. Emerson and Kristin chose surgery rather than watch and wait, because untreated bleeding can cause lasting vision loss and leave a patient unable to function normally.
Because she was pregnant, her doctors took an unusual approach. Emerson performed a vitrectomy on both eyes in the same session and used local anaesthesia so she could remain awake, while obstetric specialists monitored the baby during the procedure. The operation involved removing the blood from each eye and treating the source of bleeding to reduce the chance of it happening again. Kristin’s sight did not snap back immediately, but within days she could read the vision chart again, and a week later she was well enough to cook from a recipe. More than a decade on, her vision remains intact.
Her experience underlines a broader lesson for people with diabetes, especially those with type 1 diabetes and a long history of the disease. The American Diabetes Association advises a retinal examination in the first trimester and follow-up eye care during the second and third trimesters, with more frequent visits depending on risk. The CDC says blood sugar, blood pressure and cholesterol all influence eye health, while the NIDDK notes that one in three people with diabetes over 40 shows signs of retinopathy. For pregnant patients, the message is clear: even when glucose control is good, eye screening should not be skipped.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
