Symptom

Difficulty seeing at night (night blindness)

Get checked if it is worsening

Medically reviewed by · Last reviewed 2026-07-06 · How review works

When to get it checked

  • Night vision that is steadily getting worse over months
  • Loss of side vision or tunnel vision as well as poor night vision
  • Night vision problems with diabetes
  • A family history of inherited retinal disease with new symptoms

Common causes

Night vision relies on a clear lens and a healthy retina. These conditions can affect it.

Cataracts A cloudy lens cuts night vision and increases glare from headlights. Short-sightedness Uncorrected or under-corrected short sight worsens night vision. Retinitis pigmentosa An inherited retinal condition where night vision is lost early. Diabetic retinopathy Diabetic retinal damage can reduce night and overall vision. Glaucoma Advanced glaucoma reduces side vision and night vision.

What can help

  • Book an eye test, as cataracts and the right glasses are common, treatable causes
  • Take extra care driving at night and keep windscreens and glasses clean
  • Seek assessment if night vision is steadily worsening

Frequently asked questions

What causes difficulty seeing at night?

The most common causes are cataracts and an uncorrected glasses prescription. Progressive night vision loss can occasionally signal a retinal condition and should be checked.

Is poor night vision a sign of something serious?

Often it is a treatable cataract or focusing problem. But steadily worsening night vision, especially with loss of side vision, can signal a retinal condition and needs assessment.

Can night vision be improved?

Yes, when the cause is treatable: updating glasses and cataract surgery often restore night vision. Retinal causes are managed with specialist support.

Trusted sources

This page reflects established clinical guidance. For further reading, consult these authoritative eye-health organisations: