When Is Cataract Surgery Needed? How to Know It Is Time

Medically reviewed by Dr. Fouad El Sayyad, Consultant Ophthalmologist — Cornea, Cataract & Refractive Surgery · Last reviewed: October 2026

Quick answer: Cataract surgery is needed when the cataract starts to affect your daily life: reading, driving, especially at night, working or moving around safely. You do not need to wait for it to “ripen”. I recommend surgery when glasses no longer give you the vision you need, or earlier if the cataract affects the health of the eye or the treatment of another eye condition.

Key Takeaways

• The timing of cataract surgery depends on how much the cataract affects your life, not on the cataract being “ripe”.
• Difficulty with night driving, reading or glare is often the first reason to consider surgery.
• Waiting too long can make the cataract harder and surgery more demanding.
• Studies link cataract surgery with fewer car crashes in older drivers.
• Sometimes surgery is advised earlier for medical reasons, such as narrow angles or to examine the retina.

Do You Have to Wait for a Cataract to “Ripen”?

No. This is one of the most common myths I hear. Decades ago, cataracts were removed through a large incision, and surgeons waited until the lens was very cloudy. With modern phaco surgery through a 2.2 mm incision, there is no benefit in waiting. In fact, a very mature, hard cataract needs more ultrasound energy and makes surgery more demanding.

What Are the Signs That It Is Time for Surgery?

• Glasses no longer give clear enough vision for your work, reading or hobbies
• Glare and halos make night driving difficult or unsafe
• You struggle to recognise faces, read signs or watch television
• You need much more light to read
• Your vision affects your independence, balance or confidence moving around
• You do not meet the vision standard for driving

When Might I Recommend Surgery Earlier?

• Narrow drainage angles: a thick cataract can crowd the front of the eye and raise the risk of angle-closure glaucoma.
• Retinal disease: in diabetes or macular disease, a clear view of the retina is needed for treatment and monitoring.
• A very dense or rapidly progressing cataract, before it becomes harder to remove.
• A large difference between the two eyes that causes imbalance or double vision.

Is It Ever Too Early for Cataract Surgery?

If a cataract is mild and your vision still meets your needs with updated glasses, you can safely wait and be reviewed regularly. Surgery is a choice made together, based on your symptoms and examination, not on age or a number on the chart alone.

There is one situation where the lens is removed before a cataract is significant: refractive lens exchange. Here, a clear or slightly cloudy lens is replaced with a lens implant to correct a high prescription or the need for reading glasses, for example in patients whose cornea is not suitable for laser, or who want a more permanent solution and are getting closer to the age when a cataract develops. Because it is surgery inside the eye, it carries a slightly higher risk than laser vision correction, so I discuss it carefully at the screening. Read about Presbyond and when lens surgery is the better option.

“I do not operate on a cataract because it is there. I operate when it is holding someone back, and the right time is different for a taxi driver, a surgeon and a retired reader.” — Dr. Fouad El Sayyad

Why Does Timing Matter for Safety?

Good vision is important for safety. A 2023 systematic review in BMJ Open found that cataract surgery can reduce the risk of car crashes, and an Australian study found fewer crashes after both first- and second-eye surgery. Clearer vision also helps with balance and moving around safely. A 2022 study in JAMA Internal Medicine also found that older adults who had cataract surgery had a lower risk of developing dementia than those who did not, although this association needs further research.

What Happens If You Delay Too Long?

A cataract that is left for many years can become very dense and white. Vision can fall to seeing only light and shapes, surgery becomes technically harder, and in some eyes the swollen lens can cause inflammation or raised eye pressure. These problems are much less likely when surgery is planned at the right time.

What Happens Next?

If you and I decide surgery is right for you, I plan it with a careful slit-lamp examination and precise measurements, and we choose the lens implant together. Read the complete guide to cataract surgery, how to choose a lens and the causes and symptoms of cataracts.

What Patients Say (Google Reviews)

Dr. Fouad El Sayyad combines scientific skill, good manners and very careful follow-up. I had a cataract operation that was a great success, and I thank him, the medical team and all the staff of Sayyad Eye Center.

Google review · Sayyad Eye Center, Mohandeseen · December 2025 · translated from Arabic

Where Does Dr. Fouad El Sayyad See Patients?

• Sayyad Eye Center, Mohandeseen (main branch, where cataract surgery is performed): 3A Gameat El Dowal El Arabeya St., Sphinx Square.
• Sayyad Eye Center, New Cairo: Medical Park 2, opposite New Cairo Court.

To book an appointment with Dr. Fouad El Sayyad, call or WhatsApp 01000088168.

Frequently Asked Questions

When is the right time for cataract surgery?

When the cataract starts to affect your daily life, such as reading, driving or working, and glasses no longer help enough. You do not need to wait for the cataract to ripen.

Should I wait for my cataract to ripen?

No. With modern phaco surgery, waiting brings no benefit. A very hard, mature cataract can make surgery more demanding.

Can I drive with a cataract?

Many people with early cataracts drive safely, but glare at night is often the first problem. If you struggle at night or do not meet the vision standard for driving, it is time to consider surgery.

Is it dangerous to delay cataract surgery?

Delaying for a short time is usually safe. Leaving a cataract for many years can make it very dense, make surgery harder and, in some eyes, cause inflammation or raised eye pressure.

Can I have cataract surgery if I also have glaucoma or diabetes?

Yes. Cataract surgery is often done in eyes with glaucoma or diabetes, and sometimes earlier, to help treat or monitor these conditions. The plan is adapted to your eye.

Is there an age limit for cataract surgery?

No. Cataract surgery is performed safely in people in their 90s. What matters is your overall eye and general health, not age alone.

Do both eyes need surgery at the same time?

No. Each eye is assessed on its own. When both eyes need surgery, I usually operate on the second eye within a few days to a week.

Can the lens be removed before a cataract is advanced?

Yes. In refractive lens exchange, the natural lens is replaced early to correct a high prescription or reduce the need for reading glasses, even when the cataract is mild. It suits selected patients and is discussed carefully, because it is surgery inside the eye.

How do I know if my cataract is causing my blurred vision?

Only an eye examination can tell. Other conditions, such as dry eye, corneal problems or macular disease, can cause similar blurring and change the plan.

This article is for general education and does not replace an eye examination. Treatment decisions depend on your own eye assessment.

References

• Miller KM, Oetting TA, Tweeten JP, et al. Cataract in the Adult Eye Preferred Practice Pattern. Ophthalmology. 2022;129(1):P1–P126.
• Chen SP, Woreta F, Chang DF. Cataracts: a review. JAMA. 2025;333(23):2093–2103.
• Nguyen H, Di Tanna GL, Coxon K, et al. Associations between vision impairment and vision-related interventions on crash risk and driving cessation: systematic review and meta-analysis. BMJ Open. 2023;13(8):e065210.
• Meuleners LB, Brameld K, Fraser ML, et al. The impact of first- and second-eye cataract surgery on motor vehicle crashes and associated costs. Age Ageing. 2019;48(1):128–133.
• Lee CS, Gibbons LE, Lee AY, et al. Association between cataract extraction and development of dementia. JAMA Intern Med. 2022;182(2):134–141.