The Root Cause Medicine Podcast Modern Eye Care: The Gut-Eye Axis, Oculomics, HRT & More
Nov 20, 2025
56:15
In this fast-moving, clinically rich tour through the new frontiers of integrative eye care, Dr. Gioia connects the dots between microbiome-driven inflammation, AI-powered retinal biomarker extraction, and hormonal transitions that reshape ocular physiology—all in a way that feels practical for everyday clinical reasoning. She illustrates how gut permeability markers may parallel ocular surface symptoms, how retinal microvascular mapping can hint at systemic resilience, and why perimenopause and menopause deserve far more attention in the modern eye exam. Throughout the episode, she gives clinicians evidence-informed frameworks for synthesizing gut, hormone, nutrient, and imaging data into a more proactive, prevention-oriented approach to vision health.
Clinical Takeaways from This Episode
- Gut-Eye Axis and Systemic Inflammation Pathways: Dysbiosis may influence cytokine activity, intestinal permeability, and endotoxin load—factors that can contribute to ocular discomfort or inflammatory pathways affecting the uveal tract, conjunctiva, and retina. Clinicians may consider gut-driven contributors when chronic ocular symptoms persist despite standard care.
- AI-Driven Oculomics for Early Risk Detection: Retinal photography and OCT/OCT-A imaging combined with AI allow analysis of microvascular integrity, tortuosity ratios, nerve fiber patterns, and biological age metrics—supporting prevention-focused evaluation of cardiovascular, neurologic, metabolic, and longevity-related risk patterns.
- Hormone-Responsive Ocular Tissues and Midlife Vision Changes: Sex-hormone receptors in the lacrimal and meibomian glands, cornea, and retina help explain perimenopause- and menopause-related symptoms such as dry eye, fluctuating vision, and ocular-surface sensitivity. Hormonal transitions may influence lipid secretion, tear stability, and DHA metabolism.
- Preventive Vision Care as a Whole-Systems Touchpoint: Regular retinal imaging, nutrient status assessments, and symptom scoring may help clinicians identify early ocular patterns associated with metabolic or inflammatory changes. Annual eye exams remain essential—even when vision clarity appears stable.
- Nutrient Density and Ocular Resilience Across the Lifespan: Nutrients such as DHA, lutein, and zeaxanthin play supportive roles in retinal structure, macular function, and tear-film stability. Identifying nutrient insufficiencies or imbalances—especially in zinc and copper ratios—may help clinicians guide personalized nutrition strategies.
- Integrative Data Linking: Gut, Hormones, Labs, and Retinal Biomarkers: Combining stool markers (e.g., zonulin, calprotectin, SCFAs), hormone trends, nutrient analysis, and ocular imaging may offer a more complete preventive picture for chronic eye symptoms and systemic health mapping.
Guest Introduction
Dr. Neda (Nehda) Gioia, OD, CNS®, IFMCP, FOWNS, is the founder of Integrative Vision, where she merges optometry, functional medicine, and clinical nutrition into a prevention-first model of eye care. Drawing on her advanced training—including certification from the Institute for Functional Medicine and credentials in clinical nutrition—she educates clinicians on ocular nutrition, gut–eye interactions, and modern imaging applications. She consults nationally, offers virtual ocular nutrition services, and publishes on integrative optometry.
- Website: integrativevision.com
- Professional site: https://www.drnedagioia.com/
Labs, Nutrition, and Lifestyle Support
- Gut-Eye Axis & Microbiome Assessment
- Stool Markers to Consider: zonulin for permeability; calprotectin for gut-immune activity; SCFAs for microbial metabolite status.
- Hormone-Aware Eye Health
- Labs: DHEA-S, estradiol, SHBG for midlife symptom mapping; consider androgen patterns when evaluating dry eye.
- Key Insight: Meibomian gland lipid secretion is influenced by androgen receptor activity and local conversion of testosterone to DHT.
- AI-Enhanced Oculomics
- Tools: OCT / OCT-A, retinal photography, and AI-driven vascular analytics that assess capillary density, tortuosity, and nerve fiber patterns.
- Use Case: May support early identification of cardiovascular, neurologic, metabolic, or other trends.
- Nutrient Support for Retinal and Tear-Film Health
- Core Nutrients: DHA-rich marine sources; lutein and zeaxanthin; balanced zinc-to-copper intake.
- Evidence Note: AREDS2 highlights the role of targeted nutrient formulas in reducing progression risk for specific macular conditions.
- Lifestyle Strategies for Preventive Eye Care
- Dietary Pattern: Mediterranean-style eating pattern for broad ocular-supportive nutrient density.
- Visit Frequency: Annual eye exams beginning in midlife, or more often with ocular or systemic risk factors, even if vision is normal.
Clinician FAQ: Gut-Eye Axis, Oculomics, Hormones, and Preventive Eye Care
- How strong is the evidence linking dysbiosis to ocular inflammation? Emerging research shows meaningful associations between gut dysbiosis and ocular inflammatory pathways, including effects on cytokines, permeability, SCFA signaling, and retinal immune activation. Mechanistic animal and human data continue to expand, though large interventional trials remain limited. Citation: Rowan S, et al. Front Cell Neurosci. 2024. Available at: https://www.frontiersin.org/articles/10.3389/fncel.2024.1468187/full
- Which stool markers may be relevant when patients present with chronic ocular symptoms? Markers such as zonulin, calprotectin, and SCFAs may help clinicians understand permeability, gut-mediated immune activity, and microbial metabolite patterns that could interact with ocular-surface or retinal inflammatory pathways.
Citation: Rowan S, et al. Front Cell Neurosci. 2024. Available at: https://www.frontiersin.org/articles/10.3389/fncel.2024.1468187/full - How does AI-enhanced oculomics fit into preventive medicine? AI-driven retinal imaging can identify subtle microvascular changes, nerve-fiber patterns, and tissue integrity metrics that may correlate with cardiovascular, neurologic, metabolic, and longevity-related risk. These tools expand prevention by extracting systemic biomarkers from retinal data. Citation: Keane P, et al. Theranostics. 2024. Available at: https://www.thno.org/v15p3223.pdf
- Which hormonal shifts are most relevant to midlife changes in ocular comfort? Perimenopause- and menopause-associated fluctuations in estrogen and declines in androgen activity may impact meibomian gland lipid output, tear film stability, ocular surface sensitivity, and inflammatory thresholds.Citation: Jin, Xiuming, et al. “Hormone Replacement Therapy Benefits Meibomian Gland Dysfunction in Perimenopausal Women.” Medicine, vol. 95, no. 31, Aug. 2016, p. e4268, https://doi.org/10.1097/md.0000000000004268
- Should clinicians routinely evaluate eye symptoms when initiating hormone therapy? Changes in ocular comfort—including dryness, irritation, or fluctuating vision—may accompany hormone transitions or therapy adjustments. Incorporating eye-symptom questions may help clinicians detect hormone-related effects on the ocular surface. Citation: Abelson MB, Lines L. Review of Ophthalmology. 2006. Available at: https://www.reviewofophthalmology.com/article/hormones-in-dry-eye-a-delicate-balance
- Which nutrients are most essential for long-term ocular support? DHA, lutein, and zeaxanthin are well-studied nutrients supporting retinal function and macular pigment density. Balanced zinc and copper intake is also important for ocular and neural physiology. Citation: Age-Related Eye Disease Studies (AREDS/AREDS2): major findings https://www.nei.nih.gov/research/clinical-trials/age-related-eye-disease-studies-aredsareds2/about-areds-and-areds2
- How often should adults receive a comprehensive eye exam? Dr. Gioia explains that many adults benefit from annual examinations starting around age 40—earlier or more frequently for those with ocular symptoms or systemic risk factors—because asymptomatic conditions such as early glaucoma or macular changes may be detectable only through imaging.
- What’s the clinical advantage of combining gut, hormone, and retinal imaging data? According to Dr. Gioia, integrating these data streams can help clinicians observe multi-system patterns earlier—linking inflammatory load, hormonal fluctuations, nutrient availability, and microvascular integrity into a unified preventive strategy.
Disclaimer: The views expressed on this podcast are those of the hosts and guests and don’t necessarily reflect those of Fullscript or any affiliated organizations. This podcast is for informational and educational purposes only and is not intended to be medical advice. For your safety, always check with your doctor or healthcare provider before making changes to your health routine.