🏥 When to See a Doctor

The 48-Hour Rule

Mild sharp pain with blinking that settles within 24–48 hours, with normal vision and no spreading redness, is almost always a dry patch or tiny scratch that heals on its own. The moment to seek help is when pain persists beyond that, or when it arrives with redness, light sensitivity, vision change, or a known injury. A painful red eye is never something to leave for weeks — a corneal infection can scar the eye if treatment is delayed.

Why Prompt Assessment Matters

The cornea heals fast when healthy — most abrasions close within 24–48 hours. But the same symptoms can be the start of a corneal infection (keratitis), which is sight-threatening if untreated and most common in contact lens wearers. A slit-lamp examination with dye takes minutes and distinguishes a scratch from a foreign body from an infection — three very different treatments. That speed of diagnosis is the entire argument for not waiting.

What to Expect

• Slit-lamp examination: with a fluorescent dye that reveals scratches and foreign bodies under blue light.
• Eyelid eversion: to check for specks hiding under the upper lid.
• Removal: a foreign body or ingrown lash is removed in minutes with topical anaesthetic drops.
• Treatment: lubricating drops for dryness, antibiotic drops for scratches or infection, and a review appointment for anything that does not heal.

Which Professional to See

An optometrist is often the fastest route — they have the slit lamp and can treat most surface problems. A GP can manage simple cases and refer on. An ophthalmologist (eye emergency) is the destination for suspected infection, severe injury, or anything vision-threatening. For contact lens wearers with pain, go straight to an eye professional.

Urgency Guide

• Same day: severe pain, vision loss, a very red eye, chemical splash, or pain with contact lenses.
• Within 24–48 hours: persistent pain with redness or light sensitivity, or a scratch from plant material.
• Routine: recurrent mild dryness-related pain you want investigated.

While you wait, the relief page has safe measures — and the key "don'ts."

Questions the Optometrist May Ask

• Did anything hit the eye, and when did the pain start?
• Do you wear contact lenses, and did you sleep in them or wear them too long?
• Is the pain sharp with blinking, or constant?
• Is your vision normal, and is the eye red or sensitive to light?
• Do artificial tears help, or make no difference?

What Happens If You Wait — and What You Can Do Now

Waiting 24–48 hours with mild, improving pain is correct. Waiting days with a red, painful eye is how a treatable infection becomes a scarring one. While you wait: use preservative-free artificial tears, stop wearing lenses, avoid rubbing, and rest the eyes from screens. If pain is severe, vision is affected, the eye is very red, or anything struck the eye, go the same day rather than waiting — an eye examination takes minutes and distinguishes scratch, foreign body, and infection, which need completely different treatment.

How to Prepare for the Appointment

Note when the pain started, what it feels like (sharp with blinking, constant, gritty), and whether anything struck the eye or preceded it. Mention whether you wear contact lenses — and whether you slept in them or wore them beyond their schedule — because that single fact changes the urgency. Note any redness, light sensitivity, discharge, or vision change, and whether artificial tears help or do nothing. If you wear lenses, bring the lens case and solution. This information lets the practitioner go straight to the slit lamp and the right treatment.

What the Tests Will Show

The slit-lamp examination with a fluorescent dye is the definitive test. The dye pools in any scratch, revealing abrasions that are invisible to the naked eye; foreign bodies show up lodged in the cornea or under the lid; and a healthy smooth surface with dye pooling only in dry patches points to dryness. The practitioner will also evert the upper lid to check for specks hiding there. Each finding maps to a different treatment — lubricating drops for dryness, removal for a foreign body, antibiotic drops for an abrasion or infection. The whole examination takes minutes, which is why there is so little reason to wait when the pattern is concerning.

Treatment Options at a Glance

• Dryness: preservative-free artificial tears, night-time gel, and the relief routine.
• Foreign body: removal at the slit lamp, usually in minutes with anaesthetic drops.
• Abrasion: antibiotic or lubricating drops and a review until healed.
• Infection: urgent — antibiotic treatment under professional supervision, with follow-up.