Most advice about keeping eyes healthy is either obvious or commercially motivated. The genuinely useful list is short, unglamorous and almost entirely free. It is also the list that rarely appears on a supplement page, because none of it can be sold.
That is the tension worth naming at the start. The things that help you maintain a healthy vision are boring, free, and measured in decades rather than weeks — which makes them a poor product and an excellent habit.
Get examined on a schedule, not when something breaks
A dilated eye examination is the single highest-value thing most adults can do for their vision. It finds glaucoma before symptoms, diabetic changes before vision loss, and macular changes before distortion.
| Who | Suggested interval | Why |
|---|---|---|
| Children | Screening at well-child visits; examination if any concern | Amblyopia and refractive error respond best to early detection |
| Adults 20–39 | Every 5–10 years, or sooner with symptoms | Baseline and detection of early refractive change |
| Adults 40–54 | Every 2–4 years | Presbyopia onset; glaucoma risk begins to climb |
| Adults 55+ | Every 1–2 years | Cataract, glaucoma and macular degeneration all rise sharply |
| Diabetes | Annually, or as advised | Retinopathy is asymptomatic until late |
| Family history of glaucoma | Discuss earlier and more frequent screening | Strong familial risk |
Daily habits worth keeping
Seven habits, none of which cost anything.
- Follow the 20-20-20 pattern during sustained screen work.
- Blink completely when your eyes feel gritty; screens suppress blink rate.
- Wear UV-blocking sunglasses outdoors — cumulative UV exposure is linked to cataract and pterygium.
- Wear eye protection for DIY, mowing, and any sport with a ball or racket.
- Do not sleep in contact lenses, and follow replacement schedules.
- Keep hands away from eyes during cold and flu season.
- Manage screen distance and lighting, and take real breaks — not screen-to-screen ones.
The risk factors that matter most
Four modifiable factors account for a large share of preventable vision loss.
Blood sugar. Diabetic retinopathy is a leading cause of blindness in working-age adults, and tight control reduces progression. Smoking. Associated with cataract, macular degeneration and dry eye. Blood pressure. Retinal vascular disease follows vascular health. Obesity and inactivity, largely through their effect on diabetes and vascular risk. Untreated sleep apnoea is increasingly linked to ocular surface and retinal disease as well.
None of that is exciting, and all of it outperforms any supplement on offer. Our article on preventing vision loss goes through the evidence in more detail.
Nutrition: supporting, not treating
Diet matters for eye health, but it supports rather than treats. Leafy greens, colourful vegetables and oily fish supply lutein, zeaxanthin and omega-3 fatty acids; the AREDS2 trial supports a specific antioxidant formula in people with intermediate macular degeneration. Outside that population, supplements have not been shown to prevent vision loss.
Our nutrition for eye health guide separates the nutrients with real evidence from the ones with enthusiastic marketing.
Three myths worth discarding
Reading in dim light does not damage eyes. It causes strain, not injury. Crossed eyes do not stay that way. The old warning about children’s faces freezing is false — and squints need assessment, not superstition. Glasses do not weaken eyes. Needing a stronger prescription over time is normal progression, not a consequence of wearing correction.
Frequently asked questionsHow often should I have an eye exam?
Every 1–2 years from about 55, every 2–4 years between 40 and 54, and every 5–10 years in earlier adulthood — sooner with diabetes, a family history of glaucoma, or symptoms.Do carrots improve eyesight?
Carrots supply vitamin A, which is essential for night vision, but eating extra does not improve acuity in a well-nourished person. The carrot myth comes from wartime propaganda.Can I keep my eyes healthy without supplements?
Yes. Screening, blood-sugar control, not smoking, UV protection and good screen habits have more evidence behind them than any over-the-counter eye formula.Do sunglasses really matter?
Yes. Cumulative UV exposure is associated with cataract and with pterygium, and UV protection is one of the few interventions with consistent support.Is reading in the dark bad for my eyes?
It causes temporary strain and poorer focus, not damage. Turn a light on for comfort, not for safety.
How often should I have an eye exam?
Do carrots improve eyesight?
Can I keep my eyes healthy without supplements?
Do sunglasses really matter?
Is reading in the dark bad for my eyes?
References
- American Optometric Association. Computer vision syndrome. Source
- GBD 2019 Blindness and Vision Impairment Collaborators. Trends in prevalence of blindness and distance and near vision impairment over 30 years. The Lancet Global Health. 2021;9(2):e130–e143. Source
- Stapleton F, Alves M, Bunya VY, et al. TFOS DEWS II epidemiology report. The Ocular Surface. 2017;15(3):334–365. Source
- National Eye Institute. Diabetic retinopathy. Source
- National Eye Institute. Glaucoma. Source
- National Eye Institute. Cataracts. Source
- National Eye Institute. Age-related macular degeneration (AMD). Source
- Age-Related Eye Disease Study 2 Research Group. Lutein + zeaxanthin and omega-3 fatty acids for age-related macular degeneration: the Age-Related Eye Disease Study 2 randomized clinical trial. JAMA. 2013;309(19):2005–2015. Source
- Zhao ZC, Zhou Y, Tan G, et al. Research progress about the effect and prevention of blue light on eyes. International Journal of Ophthalmology. 2018;11(12):1999–2003. Source
Links open in a new tab. Citations are provided for ingredient and background research only. No published trial has tested the finished EyeFortin formula.