Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Seek urgent or emergency eye care for:
Sudden loss or major reduction of vision
Severe or rapidly worsening eye pain
A chemical splash or penetrating eye injury
A cloudy or white area appearing on the cornea
Severe redness with marked light sensitivity or inability to open the eye
If a chemical enters the eye, start rinsing it immediately with plenty of clean, lukewarm water and continue while emergency help is arranged.
Do not delay rinsing to search for a particular solution.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Request prompt medical advice if pain, redness, light sensitivity, discharge, or blurred vision develops.
These symptoms can occur when the cornea has been scratched or inflamed and should not wait for a distant routine appointment.
3
Does any of this apply?
Book an appointment
Arrange a routine eye assessment if your eyelid appears to turn inward, your eyelashes repeatedly touch your eye, or you have ongoing watering or a gritty feeling.
Assessment is also appropriate when symptoms keep returning after temporary relief.
Every sign above is quoted from the sofidex article on Entropion. If you are not sure, err upward — it is always reasonable to be checked.