Supplements, eye exercises and natural remedies: what the evidence shows

I am asked about supplements and natural remedies at almost every consultation. Some have genuine evidence, most are harmless, and a few are actively risky because they delay effective treatment. Here is where each one stands.

AREDS2 supplements — genuine evidence, narrow use

The large AREDS2 trial showed that a specific formulation (lutein, zeaxanthin, vitamins C and E, zinc and copper) slows progression in intermediate or advanced age-related macular degeneration. It does not prevent AMD in healthy eyes, and it does nothing for cataract. If your optometrist has diagnosed intermediate AMD, it is worth discussing; otherwise it is not.

Omega-3 for dry eye — modest and mixed

Evidence is inconsistent. Large trials have been disappointing, though some patients report symptomatic benefit. Warm compresses, lid hygiene and preservative-free lubricants have better support, and treating meibomian gland disease treats the actual cause.

Bilberry, eyebright and 'cataract-reversing' drops — no evidence

No supplement or drop has been shown to reverse or prevent cataract in humans. Products marketed for this purpose are, at best, a waste of money.

Eye exercises for short-sightedness — no evidence

The Bates method and its descendants do not change refractive error. Orthoptic exercises are effective for specific binocular problems such as convergence insufficiency, which is an entirely different condition.

Blue-light filtering glasses — weak evidence

Systematic reviews have not found convincing benefit for eye strain or sleep from blue-blocking spectacle lenses. Reduced blinking and screen habits, not blue light, drive most digital eye discomfort.

Diet — real but general

Not smoking is the single most powerful modifiable factor for both cataract and AMD. A diet rich in leafy greens and oily fish, good blood pressure and diabetic control, and UV protection outdoors all genuinely help. None of them reverses existing structural change.

Where 'natural' becomes harmful

Delay. Every year I see patients who spent two years on supplements while a cataract matured, glaucoma progressed or diabetic retinopathy advanced. Supplements do not lower intraocular pressure and they do not clear a cloudy lens.

A sensible position

Take AREDS2 if you have the specific diagnosis that supports it. Look after dry eye properly. Do not smoke. And have a dilated examination rather than self-treating symptoms whose cause has never been established.

Where to go from here

If any of this sounds like your own experience, the sensible next step is a full diagnostic assessment with a consultant — not a sales appointment. Ms Tahmina Pearsall is a UK-trained NHS Consultant Ophthalmic Surgeon with more than 40,000 procedures behind her, and she personally performs every operation she plans. You can see current fixed prices, read verified patient reviews or book a consultation at any of the UK clinic locations.

This article is general information written by a consultant ophthalmic surgeon. It is not a substitute for a personal examination and individual medical advice.