Causes and risk factors
Ring scotomas frequently occur in patients with glaucoma. Pigmentary degeneration of the retina and optic nerve disorders are the other known causes.
Clinical presentation
Ring scotoma can affect one or both the eyes. The patients present with a sudden loss of vision in a ring-shaped area of the visual field. However, the visual acuity remains unaffected.
Investigations
A ring scotoma can be detected on a complete ophthalmological examination. Specialized investigations such as an electroretinogram or fluorescein angiography may be performed.
Treatment
The underlying cause must be identified and treated. Scotomas have a limited scope for improvement.
When to contact a doctor
Contact a doctor as soon as you experience loss of vision in a particular area of the visual field.
Systems involved
Ophthalmology
Organs involved
Eyes
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