Vision Loss
Vision loss — partial or complete loss of sight — can develop gradually or suddenly. Sudden vision loss is a medical emergency requiring immediate evaluation to prevent permanent damage.
Table of Contents
Quick Facts
- ICD-10: H54
- Sudden = emergency: Yes
Call 911 or Seek Same-Day Care
Seek emergency care for:
- Sudden vision loss in one or both eyes
- Curtain or shadow over your vision
- Vision loss with severe headache, weakness, or speech problems (possible stroke)
- Vision loss with severe eye pain or nausea (angle-closure glaucoma)
- Vision loss after eye trauma
- Flashing lights and many new floaters
Common Causes
Sudden
- Retinal detachment
- Central retinal artery or vein occlusion
- Stroke affecting visual pathways
- Acute angle-closure glaucoma
- Temporal arteritis (older adults)
- Optic neuritis
- Severe hyphema (blood in front of eye)
Gradual
- Cataracts
- Age-related macular degeneration
- Glaucoma
- Diabetic retinopathy
- Refractive error progression
When to See a Doctor
Any new vision loss warrants prompt evaluation. Time matters most for sudden vision loss — same-day care is often the difference between recovery and permanent damage.
Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. If you are experiencing a medical emergency, call your local emergency number immediately.
References
- American Academy of Ophthalmology. Vision Loss Resources.