Pregnancy or epilepsy
Pregnancy
You can safely work with display screen equipment (DSE) if you're pregnant. Scientific studies have not shown any link between miscarriages or birth defects and working with DSE.
Epilepsy
Most people with epilepsy are not affected by DSE. If you suffer from photo-sensitive epilepsy you may be affected in some circumstances, but often you'll still be able to work with DSE without having an attack.
You can get further information from Epilepsy Action[1] and the Epilepsy Society.[2]