Home Risk factors you can work on
Risk factors you can work on
Blood pressure, weight, and obstructive sleep apnea
Same-day care
Sudden vision loss in one eye needs same-day care.
Call an eye doctor or go to the emergency department.
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Three common health issues come up again and again in research on NAION (non-arteritic anterior ischemic optic neuropathy, sometimes called a “stroke of the optic nerve”): blood pressure, excess weight, and obstructive sleep apnea (OSA). They are also the issues most affected when someone starts a GLP-1 medicine. Each page below explains how the issue is measured, how it is managed, and how it has been linked to NAION, with a separate section for clinicians.
A risk factor makes a condition more likely; it does not mean it will happen. Most people with these factors never develop NAION. For the full list of NAION risk factors, including the shape of the optic disc, see NAION risk factors.
The three pages
- Blood pressure — home and 24-hour monitoring, nighttime “dipping,” treatment, and the proposed link between low blood pressure at night and NAION.
- Weight — BMI and waist size, ways to lose weight (including GLP-1 medicines and surgery), and why weight loss and the GLP-1 NAION label are both part of the picture.
- Sleep apnea — screening questionnaires, sleep testing, treatment, and the association between sleep apnea and NAION.
How they connect
These three issues overlap. Excess weight is associated with high blood pressure and sleep apnea; sleep apnea is associated with high blood pressure, especially at night; and losing weight can improve both.¹ ² ³ Working on one often helps the others. Changes to blood pressure medicines, however, should always be made by the clinician who prescribes them.
Dr. Deom’s recommendation (clinical opinion / practice recommendation)
Dr. James Deom recommends that everyone starting or taking a GLP-1 medication have a comprehensive dilated eye exam with OCT, OCT angiography (OCTA), and retinal photography (fundus photos with autofluorescence) as a baseline and for follow-up, and seek same-day care for sudden vision loss.
This is his clinical opinion, not a formal rule from every professional group. AAO and NANOS do not recommend an eye exam only to predict NAION, and no test can reliably predict or prevent it. Dr. Deom recommends the baseline so there is a record to compare against if anything changes, and so other eye problems can be found early.
Dr. James Deom’s personal clinical thought
This is his opinion, not established evidence. It is not a finding from the studies or a position of the FDA, EMA, AAO, NANOS, or AOA.
As people lose weight and get healthier on GLP-1 medicines, their blood pressure and cholesterol medicines are often not reviewed or adjusted. Blood pressure treatment that is no longer matched to a person’s needs may lead to low blood pressure (hypotension). Low blood pressure can be more pronounced at night and could reduce blood flow to the optic nerve during sleep. That possibility would fit the typical way NAION presents: vision loss noticed on waking.
Dr. Deom recommends that people taking a GLP-1 medicine also work on exercise and diet, and keep regular visits with their usual doctors — even if that doctor did not prescribe the GLP-1 — so the rest of their care, including blood pressure, is maintained. Do not start, stop, or change a blood pressure or cholesterol medicine on your own; talk with the clinician who prescribes it.
If your vision changes
Sudden vision loss in one eye needs same-day care. Call an eye doctor right away. If you also have a new headache, jaw pain when chewing, scalp tenderness, or fever, go to the emergency department.
For clinicians
Each subpage has a clinician section covering measurement, management, the proposed NAION mechanism, and coordination of care. Prescribers may also want GLP-1 RAs and NAION and When to refer.
How to reach us
Same-day evaluation: providers can call the office at 570-453-2020 (fax 570-453-1020), or refer a patient or ask a question by email. Patients can schedule an exam online.
For privacy, please don’t include patient names or other identifying details in email. Our team will call to schedule and gather details securely.
General contact and referrals: Hazleton Eye Specialists, phone 570-453-2020, fax 570-453-1020. See Referral information for what to send.
References
- Neter JE, et al. Influence of weight reduction on blood pressure: a meta-analysis of randomized controlled trials. Hypertension. 2003;42(5):878-884. https://pubmed.ncbi.nlm.nih.gov/12975389/
- Peppard PE, et al. Longitudinal study of moderate weight change and sleep-disordered breathing. JAMA. 2000;284(23):3015-3021. https://pubmed.ncbi.nlm.nih.gov/11122588/
- Parati G, et al. Nocturnal blood pressure: pathophysiology, measurement and clinical implications. Position paper of the European Society of Hypertension. J Hypertens. 2025;43(8):1296-1318. https://pubmed.ncbi.nlm.nih.gov/40509714/
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.