Aging & Longevity8 min read
How to Protect Your Vision as You Age
What actually changes in an ageing eye, the five habits with real evidence behind them, and the warning signs that mean book an appointment today.
Aging & LongevityRead
Eye health, evidence first
The science of
human vision,
cell by cell.
Most writing about eyesight is either selling something or repeating a myth from 1920. We read the primary research, weigh it against the guidance from the major ophthalmology bodies, and write up what it actually supports. Including when the answer is no.
Educational content only. Not medical advice, and not a substitute for a qualified eye-care professional.
Latest reading
Straight answers to the questions people actually search for, with the sources named.
Nutrition & Supplements8 min read
What Is AREDS2? The Trial, the Formula, and What It Actually Does
AREDS2 stands for Age-Related Eye Disease Study 2. What the trial tested, what the six-nutrient formula contains, what it does, and who it was found to help.
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Nutrition & Supplements11 min read
AREDS2 Supplement Brands Compared: What Each Label Actually States
PreserVision, Ocuvite, EyePromise, MacuHealth and store brands measured against the formulation the trial tested. Published label amounts, no rankings.
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Free guide
5 Science-Backed Habits to Protect Your Eyes as You Age
The short version of everything on this site that survived a look at the evidence. Five habits, the reasoning behind each, and the honest limits of what any of them can do.
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- What the eye actually loses with age, and which parts are modifiable.
- Where AREDS2 applies, and where it does not.
- Which light exposures matter and which are marketing.
- The systemic factors that quietly drive retinal risk.
The anatomy of vision
From the macula and fovea, through the retina's neurons, down the optic nerve to the visual cortex. Every structure mapped, in plain language.
Interactive Anatomy MappingClick structures to inspect
Central Visual HubActive Target
Macula & Fovea
The core visual center of the retina. Responsible for high-acuity daylight vision, the fovea is highly vulnerable to metabolic energy failure. Epitalon (AEDG) is among the reference standards studied in models of retinal pigment epithelium stress.
Path Vulnerability
Critical Oxidative Load
Energy demand
Among the most metabolically active tissue in the body, per gram
Studied Target Reference Standards
SS-3110 mg
Lyophilized Reference Vial
NAD⁺1000 mg
Lyophilized Reference Vial
Epitalon10 mg
Lyophilized Reference Vial
Why vision is an energy problem
Sharp central vision depends on the fovea and the retinal ganglion cells behind it, some of the most energy-hungry cells in the body. Three stressors keep showing up in the literature.
01
Energy demand
Foveal cones and retinal ganglion cells run some of the highest metabolic rates in the body. Their axons are unmyelinated where they cross the retina, which raises the cost of every signal they carry.
02
Oxidative load
The retina combines intense light exposure, high oxygen tension, and membranes rich in polyunsaturated fat. That is close to a worst case for oxidative chemistry.
03
Time
Mitochondrial function, NAD⁺ availability, and clearance by the retinal pigment epithelium all decline with age. The literature keeps returning to these as the axis along which the visual system wears out.
Science notes
Structural and literature research on retinal bioenergetics, written up as neutral reference surveys.
These are technical. They summarise what published in-vitro, animal, and in-silico work reports, and they assert no human outcome. Read them as background to the science, not as guidance.
Literature Review
Retinal Ganglion Cell Bioenergetics: NAD⁺ Flux and the Foveal Mitochondrial Load
Read noteLiterature Review
Elamipretide (SS-31) in Retinal Mitochondrial Protection: A Literature Synthesis
Read noteLiterature Review
Epitalon and Retinal Longevity: Telomerase Regulation in Retinal Degeneration Models
Read noteFrequently asked
- Can you improve your eyesight naturally?
- Not in the sense of sharpening focus or removing the need for glasses. Refractive error comes from the physical shape of the eye and does not respond to exercise or diet. What you can do is protect the eyesight you have and lower your risk of the conditions that cause permanent sight loss.
- Do blue-light glasses work?
- The best available evidence, including a 2023 Cochrane review of 17 randomised trials, found that blue-light filtering lenses probably make little or no difference to eye strain from screens. Screen fatigue comes from reduced blinking, sustained close focus, and glare.
- What actually protects your eyes as you age?
- A diet rich in leafy greens and oily fish, UV400 sunglasses, not smoking, controlled blood pressure and blood sugar, and regular dilated eye exams. These lower your risk of age-related eye disease rather than sharpening your current focus.
- Is anything on this site medical advice?
- No. Everything here is educational. It does not replace assessment or care from a qualified eye-care professional, and nothing is intended to diagnose, treat, cure, or prevent any disease.
Get in touch
Questions about a guide, or a correction to an article? We read everything, and we would rather be told when we get something wrong.