Ten things patients get wrong about their eyes (and one that matters most)

These are the misunderstandings I correct most often in clinic. Several of them are harmless. One of them costs people their sight.

1. 'Floaters are always harmless'

Longstanding floaters usually are. A sudden shower of new floaters, flashing lights or a shadow across your vision is an emergency — it can indicate a retinal tear or detachment and needs assessment the same day.

2. 'Screens damage your eyes'

Screens cause fatigue and dry eye by reducing blink rate. They do not cause structural damage. The 20-20-20 rule and lubricating drops address the symptoms; blue-light filters have little robust evidence behind them.

3. 'Reading in dim light ruins your eyesight'

It causes eye strain and headaches. It does not harm the eye.

4. 'Cataracts are a growth on the eye'

A cataract is the eye's own lens becoming cloudy — not a film, skin or growth over the surface. This is why it cannot be scraped off or dissolved with drops.

5. 'Eye exercises can cure short-sightedness'

They cannot. Myopia is an optical and structural property of the eye. Exercises can help specific binocular vision and focusing problems, which is a different matter entirely.

6. 'A lazy eye can never be treated in adults'

Amblyopia treatment is far more effective in childhood, but adults with amblyopia can still benefit from cataract or refractive surgery on the better eye, and sometimes from treating the amblyopic eye too. Being told nothing can be done is often wrong.

7. 'If I can see well, my eyes are healthy'

Glaucoma damages peripheral vision silently and irreversibly, and diabetic retinopathy can be advanced before vision changes. Excellent central vision is not evidence of a healthy eye — a dilated examination is.

8. 'Cataracts can be treated with drops'

No drop, supplement or diet reverses a cataract. Surgery is the only effective treatment.

9. 'Second opinions offend surgeons'

They do not. Any consultant confident in their plan welcomes one. We provide second opinions on cataract surgery routinely.

10. And the one that matters most: 'It's just my age, nothing can be done'

This single belief costs more sight in the UK than any myth on this list. Cataract, glaucoma, diabetic retinopathy and macular disease are all treatable or controllable — but only glaucoma and retinal damage caught early can be prevented from progressing. Vision lost to untreated disease does not come back.

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.