Definition of glaucoma in US English:



  • A condition of increased pressure within the eyeball, causing gradual loss of sight.

    • ‘In both uveitis and acute glaucoma, patients complain of deep, aching pain with loss of vision.’
    • ‘One way round the ethical obstacle was to look at patients with normal pressure glaucoma because many of these were not treated anyway.’
    • ‘If the rise in pressure is slow, pain is not a feature of glaucoma until the pressure is extremely high.’
    • ‘There has been a lot of debate about whether high blood pressure increases the risk of glaucoma.’
    • ‘He also has arthritis and is in the early stages of glaucoma, another disease leading to gradual loss of sight.’


Mid 17th century: via Latin from Greek glaukōma, based on glaukos ‘bluish-green, bluish-gray’ (because of the gray-green haze in the pupil).