Eye colour and light sensitivity

The iris controls how much light reaches the retina. Lighter irises generally contain less pigment, so some people with light eyes find bright sunlight, glare or camera flashes uncomfortable. This can be a longstanding trait rather than an illness.

A change from your usual tolerance deserves attention. Conjunctivitis may cause redness, watering and discomfort around light. Migraine can bring light sensitivity with headache, nausea or visual symptoms. Meningitis is uncommon but serious; light sensitivity with fever, severe headache, neck stiffness, confusion or marked drowsiness needs urgent care.

Move into softer, indirect light and use a hat or sunglasses outdoors. Increase brightness gradually when moving between dark and bright rooms, and reduce glare from screens. Keep a note of triggers, timing, headache symptoms, eye redness, discharge and any visual disturbance.

Do not wear tinted lenses continuously indoors unless an eye professional recommends them, because this can make ordinary light feel harder to tolerate for some people. Arrange an eye assessment if sensitivity is new, persistent, one-sided or interfering with reading, work or driving.

Seek urgent care for light sensitivity with severe eye pain, sudden vision loss, a very red eye, injury, chemical exposure, new weakness, trouble speaking, confusion, fever or neck stiffness. Contact lens wearers with pain or light sensitivity should be assessed promptly.

A routine appointment is suitable for longstanding sensitivity that is changing, recurrent episodes without a clear pattern, or symptoms requiring frequent dark rooms. Do not drive when glare or blurred vision makes it unsafe.

Ask whether your symptoms fit an eye-surface problem, migraine or another cause, and whether you need an eye examination or neurological review. Tell the clinician whether sensitivity affects both eyes, whether it began suddenly, and whether headache, fever, redness, discharge or vision change accompanies it.