Home Conditions A–Z Compressive optic neuropathy
Compressive optic neuropathy
When something presses on the optic nerve
Same-day care
Sudden vision loss in one eye needs same-day care.
Call an eye doctor or go to the emergency department.
Call the office 570-453-2020Find an eye doctor 5 officesSchedule an exam Pick your office
For patients and families
What it is
Compressive optic neuropathy happens when something presses on the optic nerve or the area where the two optic nerves cross (the chiasm). Causes include non-cancerous tumors such as pituitary tumors and meningiomas, blood vessel bulges (aneurysms), and swollen eye muscles in thyroid eye disease.¹ ²
Symptoms
- Vision that slowly gets dimmer or less sharp, often over months
- Colors looking faded
- Loss of side vision, sometimes on the outer side of both eyes
- Bulging eyes, double vision, or eye pressure in thyroid eye disease
The loss can be so gradual that it is noticed only when one eye is covered. Sudden worsening, a sudden severe headache, or new double vision needs same-day or emergency care.
Why it matters
Finding the cause early matters, because vision can sometimes improve once pressure on the nerve is relieved.¹ Testing usually includes a visual field test, OCT, and an MRI.
For clinicians
- Presentation: progressive, painless loss of acuity, color vision, and field; RAPD if asymmetric; the disc may look normal early, with pallor developing later.¹ Chiasmal lesions produce bitemporal defects respecting the vertical meridian. Disc edema can occur with orbital compression.
- Red flags: optic atrophy without explanation, vertical-meridian field defects, progressive “normal-tension glaucoma” with pallor out of proportion to cupping, or proptosis.¹
- Imaging: MRI brain and orbits with contrast (fat-suppressed orbital sequences); CT or CTA where aneurysm or bony disease is suspected.
- Thyroid eye disease: dysthyroid optic neuropathy is sight-threatening and calls for urgent treatment (high-dose IV glucocorticoids and/or orbital decompression), per European Group on Graves’ Orbitopathy guidance.²
- Baseline OCT RNFL/GCL and perimetry document structure and function for comparison after decompression or treatment.
References
- Biousse V, Newman NJ. Diagnosis and clinical features of common optic neuropathies. Lancet Neurol. 2016;15(13):1355-1367.
- Bartalena L, et al. The 2021 European Group on Graves’ orbitopathy (EUGOGO) clinical practice guidelines for the medical management of Graves’ orbitopathy. Eur J Endocrinol. 2021;185(4):G43-G67.
How to reach us
Hazleton Eye Specialists: phone 570-453-2020, fax 570-453-1020. Addresses for all five offices (Hazleton, Stroudsburg, Nanticoke, Pottsville, and Bangor) are on Find an Eye Doctor.
Sudden vision loss needs same-day care. Call an eye doctor right away. If you also have a new headache, jaw pain when chewing, scalp tenderness, fever, or you are over 50 and feel unwell, go to the emergency department.
Medical disclaimer. This page is for general education. The patient section is not medical advice, and the clinician section is not a clinical practice guideline; neither replaces an examination, clinical judgment, or specialty consultation. If you have sudden vision loss, seek same-day care from an eye doctor or an emergency department. Information is current as of the “last reviewed” date.