Red eyes? Constant irritation could be symptom of THIS often undiagnosed syndrome
Red eyes: It is a symptom of floppy eyelid syndrome
Floppy eyelid syndrome (FES) is where the upper eyelids are unusually elastic.
It is thought that almost 100 per cent of sufferers also have obstructive sleep apnoea, according to the journal Optometry Today.
Obstructive sleep apnoea (OSA) is a disorder characterised by recurrent interruption of normal breathing during sleep due to obstruction of the upper airway.
As such, having FES means you are almost certainly likely to suffer from this sleep condition too.