Blurred peripheral vision indicates reduced clarity at the edges of the visual field. It can be a subtle early sign of field loss or optical problems.
Causes
Glaucoma, retinal degeneration, and early retinal detachment can blur side vision. Poor spectacle design, lens decentration, or uncorrected refractive error may also make peripheral images appear less sharp.
- Patients may not notice changes until advanced without field testing
- Neurological disease can cause peripheral blur or neglect of one side
- Contact lenses that do not fully correct astigmatism may leave peripheral blur
- Systemic vascular disease contributes to some peripheral retinal disorders
Assessment
Visual field tests, intraocular pressure measurement, and retinal imaging help determine the cause. Early detection of glaucoma or retinal disease is crucial.
- Any associated shadows, flashes, or floaters warrant urgent review
- Regular screening is important in high‑risk groups such as high myopes
- Optical adjustments may resolve blur from lens issues
- Patients with confirmed field defects should receive safety and driving advice
