Cardiorespiratory fitness is among the strongest modifiable predictors of longevity, and VO₂ max carries greater prognostic weight for all-cause mortality than many conventional risk factors. Its relevance to vision is under appreciated.
The eye is a metabolically demanding, microvascular organ. The same fitness that lowers cardiovascular risk protects retinal and optic nerve tissue. Higher cardiorespiratory fitness and regular aerobic activity are associated with protection from age-related macular degeneration, primary open-angle glaucoma, diabetic retinopathy progression, and cataract. Fitter patients retain better retinal perfusion, healthier endothelial function, lower systemic inflammation, and improved glycaemic control — each a lever against sight-threatening disease.
This reframes exercise as genuine prevention for an outcome patients fear most: loss of sight and independence. VO₂ max offers an objective, trackable target that motivates behaviour change and helps stratify risk.
When you counsel patients on cardiovascular health, you are already protecting their eyes. Consider making VO₂ max part of that conversation, and refer early where retinal or optic nerve risk is emerging.
Brisbane Eye Clinic — partnering with GPs in preventive eye care.
