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A zonal scotoma is a visual field defect that affects a defined region of vision. It does not involve the entire visual field or only central vision. The defect reflects damage to specific retinal or optic nerve pathways. Zonal scotomas are identified through visual field testing.
read more about zonal scotoma ...Zonal scotomas can result from retinal disease, optic nerve damage, or vascular injury. Conditions such as glaucoma or retinal ischemia are common causes. Inflammation or trauma may also contribute. The exact cause depends on the location of the affected zone.
Symptoms include missing or blurred areas in vision. Some people notice difficulty seeing objects in specific regions. Symptoms may go unnoticed until formal testing. Vision outside the affected zone is often preserved.
Diagnosis is made using visual field testing. Optical coherence tomography may help identify structural damage. A full eye examination is required. Evaluation focuses on correlating field loss with ocular findings.
A zonal scotoma can be a sign of an eye or nerve issue that needs prompt evaluation, even if it seems mild at first. Follow-up helps confirm the cause and track whether the blind spot is stable, improving, or spreading. Treatment depends on the underlying problem, so early testing can change outcomes in some cases. If you notice sudden vision changes, new flashes or floaters, or worsening blind spots, seek urgent eye care.
It can be permanent, depending on the cause and extent of damage.
They may progress if the underlying condition is not treated.
Some are subtle and only found on testing.
They can affect one or both eyes depending on the cause.
National Eye Institute. 'Facts About Scotoma.' https://www.nei.nih.gov/
American Academy of Ophthalmology. 'Visual Field Loss.' https://www.aao.org/
Mayo Clinic. 'Eye floaters and flashes.' https://www.mayoclinic.org/
National Institutes of Health. 'Visual Field Defects.' https://www.ncbi.nlm.nih.gov/
WebMD. 'Blind Spots (Scotomas).' https://www.webmd.com/