Aims Diabetic retinopathy can deteriorate during pregnancy. This usually ma
nifests itself as an increase in the number of background retinopathy lesio
ns, notably the appearance of new cotton wool spots, predominantly during t
he first trimester. The changes are usually attributed to the rapid attainm
ent of tight glycaemic control during pregnancy. We present a case report o
f catastrophic deterioration in retinopathy during a period of stable glyca
emic control.
Results J.P. had normal fundoscopic appearance at booking and during the ea
rly part of pregnancy. She experienced rapid deterioration in visual acuity
secondary to cystoid macular oedema and vitreous haemorrhage during the th
ird trimester of pregnancy. Her glycaemic control was stable at that stage
and had not changed when compared with earlier stages of pregnancy. She req
uired three sessions of intrapartum laser therapy and postpartum vitrectomy
.
Conclusions The case highlights the importance of regular retinal surveilla
nce in a diabetic pregnancy, even in the absence of sudden improvements in
glycaemic control.