Visual acuity
Definitions
When to seek immediate medical care
See a doctor immediately if:
- Severe eye pain or irritation
- Vision loss, double vision, eye floaters, flashes of light, or halos around lights
- Severe headache, nausea, or vomiting
- Numbness or weakness on one side of the body
- Confusion, dizziness, or trouble talking
When to make a doctor's appointment
Make an appointment to see a doctor if:
- Impaired ability to read or write comfortably, drive safely, or do everyday activities
© 1998-2025 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use