Cataract Myths and Facts: What Is True and What Is Outdated
By Pauline Driscoll | Medically reviewed by Mr Lewis Pereira, FRCOphth
Published May 12, 2026 · Last reviewed May 30, 2026 · 3 min read
Key takeaways
- There is no need to wait until a cataract is ripe; that is an outdated idea, and surgery is offered when it affects daily life.
- A cataract cannot be cleared with drops, glasses, diet or lasers applied from the outside; the only proven treatment is surgery.
- A cataract does not grow back once removed; clouding that returns later is the capsule, treated with a YAG laser in minutes.
- Cataracts are mostly age-related and very common; most people develop some lens clouding by their 70s.
- Cataract surgery is one of the most successful operations performed, with about 9 in 10 people achieving improved vision.
Cataracts attract a lot of old advice that is simply wrong: you do not need to wait until a cataract is ripe, a laser cannot clear one from outside the eye, and a cataract does not grow back once removed1. These myths cause real worry and real delay, so it helps to set each one calmly against the facts, because cataracts are mostly age-related, very common, and treated by an operation that works well for most people2.
I believed a couple of these myself before my own surgery. For the foundations behind the corrections, see cataract surgery, what is a cataract and can cataracts come back.
Myth: wait until the cataract is ripe
Fact: there is no need to wait until a cataract is ripe, and that idea is outdated1. There is no fixed level of cloudiness that triggers surgery. It is offered when the cataract affects daily life, such as driving, reading, work, hobbies or falls risk, and the decision is shared between you and your surgeon1.
This one nearly caught me out. A neighbour told me to hold off until I could “barely see”, which is exactly the wrong advice; leaving a cataract very advanced can make the operation a little harder. Timing is about impact on your life, not maturity. For living well in the meantime, see coping while you wait for cataract surgery.
Myth: a laser can clear it from outside
Fact: a cataract cannot be cleared with drops, glasses, diet or lasers applied from the outside; the only proven treatment is surgery to remove the clouded lens and replace it2. Standard surgery uses ultrasound, not an external laser, to break up the lens before a new one is inserted.
A laser does have genuine roles, which is where the confusion comes from: it can perform some steps in laser-assisted surgery, and it treats capsule clouding later. Neither dissolves a cataract from outside the eye. For the difference, see laser vs standard cataract surgery and how cataract surgery works.
Myth: the cataract grows back
Fact: a cataract does not grow back. Once the clouded natural lens is removed, the same lens cannot re-cloud because it is gone2. What some people notice months or years later is posterior capsule opacification, a clouding of the thin capsule holding the new lens.
It is not the cataract returning, and it is fixed in minutes with a painless YAG laser in clinic. I had this in one eye about a year on, blamed myself for the surgery somehow failing, and felt rather silly when a five minute laser sorted it. See posterior capsule opacification and can cataracts come back.
Myth: you got cataracts from straining your eyes
Fact: cataracts are mostly age-related and very common, not caused by reading, screens or eye strain3. Most people develop some lens clouding by their 70s, and worldwide cataracts are the leading cause of reversible blindness4.
Ageing is by far the commonest cause, though diabetes, long-term steroids, eye injury and some genetic conditions also play a part. Ordinary use of your eyes does not. See what causes cataracts.
Myth: surgery is dangerous and best avoided
Fact: cataract surgery is one of the most common and most successful operations performed, with around 9 in 10 people achieving improved vision and serious sight-threatening complications uncommon at roughly 1 in 1,0002. It is still real surgery, and the decision is shared with your surgeon, but it is far from something to be feared. If you are weighing it up, is cataract surgery worth it and cataract surgery risks and complications lay out the real picture.
References
- Cataracts in adults: management (NG77), NICE. ↩
- Cataract surgery, NHS. ↩
- What are cataracts?, American Academy of Ophthalmology. ↩
- Blindness and vision impairment, World Health Organization. ↩
Common questions
Do I need to wait until my cataract is ripe before surgery?
No. Waiting until a cataract is ripe is an outdated idea from an era of older techniques. There is no fixed level of cloudiness that triggers surgery; it is offered when the cataract affects your daily life, such as driving, reading, work, hobbies or falls risk. Leaving a cataract very advanced can actually make surgery a little harder, so there is no benefit in waiting for it to mature.
Can a laser get rid of my cataract without surgery?
No. A cataract cannot be cleared with drops, glasses, diet or lasers applied from the outside. Standard cataract surgery uses ultrasound, not an external laser, to break up the cloudy lens before replacing it. A laser does have a role in laser-assisted surgery for some steps, and separately in treating the capsule clouding that can occur later, but neither dissolves a cataract from outside the eye.
Does a cataract grow back after surgery?
No. Once the clouded natural lens is removed, the same cataract cannot return, because that lens is gone. Some people notice vision clouding again months or years later; this is posterior capsule opacification, a clouding of the thin capsule that holds the new lens. It is not the cataract coming back and is corrected in minutes with a painless YAG laser in clinic.
Are cataracts caused by using your eyes too much?
No. Cataracts are not caused by reading, watching screens or straining your eyes. They are mostly age-related, a normal part of ageing as the proteins in the lens clump together. Most people develop some lens clouding by their 70s. Other causes include diabetes, long-term steroids, eye injury and some genetic conditions, but ordinary use of your eyes is not one of them.
Is a cataract a skin or film growing over the eye?
No. A cataract is a clouding inside the eye's natural lens, the clear lens behind the iris, not a film or skin growing across the front of the eye. This is a common misunderstanding. Because the change is inside the lens, it cannot be wiped away or peeled off, and stronger glasses cannot reverse it once it is established.
Is cataract surgery dangerous or best avoided?
Cataract surgery is one of the most common and most successful operations performed, with around 9 in 10 people achieving improved vision, and serious sight-threatening complications uncommon at roughly 1 in 1,000. It is still real surgery and the decision is shared with your surgeon, but the idea that it should be feared or avoided does not match how safe and routine it has become.
Written by Pauline Driscoll. Medically reviewed by Mr Lewis Pereira, FRCOphth.
Our guides are written from personal experience and reviewed by a qualified clinician for accuracy. Read our editorial policy.
More from us
Cataract Surgery and Dry Eye: Pre-existing Dryness, Drops, and Comfort After · Cataracts in Younger People: Steroids, Injury, Diabetes and Congenital Causes · Cataracts in One Eye: Imbalance, Anisometropia, and When to Operate · Cataract Surgery With Macular Degeneration: A Good Op, Honest Expectations · Cataracts and Glaucoma: Combined Surgery, Eye Pressure, and Sequencing