When should I stop wearing my contact lenses and see a doctor?

Remove lenses and seek same-day eye-care attention if any of the following appears:

• Pain that doesn't resolve within minutes of lens removal.
• Severe redness — beyond mild fatigue redness — especially around the cornea (the central black/blue part).
• Light sensitivity (photophobia) — squinting in normal indoor lighting.
• Vision change — sudden blur, haze, halos that don't clear after removal.
• Discharge — anything thicker or coloured beyond ordinary tears.
• Foreign-body sensation that persists after thorough rinsing and inspection of the eye.

The acronym is RSVP: Redness, Sensitivity to light, Vision change, Pain. Any of these = doctor today, not tomorrow.

Microbial keratitis (corneal infection) develops over hours. Early treatment usually means full recovery; delayed treatment can permanently damage vision. The cost of an unnecessary same-day appointment is small; the cost of waiting on a real infection is high.