What You Need to Know About Cataracts

Cataracts develop slowly in most people, and you may not notice symptoms right away. The questions below cover what happens as a cataract grows, how doctors detect it, what treatment looks like, and what to expect after surgery. These are the things people ask most often when they first learn they have a cataract or are thinking about whether to have it removed.

Your eye doctor is the right person to answer questions about your specific cataract — its size, location, and how fast it is changing. This guide covers the general facts that help you understand what your doctor is telling you and what your choices are.

Key Takeaways

  • Cataracts form when the lens of your eye becomes cloudy over time, usually starting after age 60, though they can develop earlier.
  • You may not need surgery right away; many people live with mild cataracts for years, and surgery is done only when vision loss affects your daily life.
  • Cataract surgery is outpatient, takes about 15 minutes per eye, and most people see improvement within a few days.
  • After surgery, you will need to use prescribed eye drops and avoid heavy lifting and water in your eye for several weeks while it heals.
  • Wearing sunglasses outdoors and managing conditions like diabetes may slow cataract growth, though nothing stops them completely once they start.

When Do I Need Cataract Surgery?

You need surgery when the cataract is causing vision loss that interferes with things you want to do — reading, driving, watching television, or recognizing faces. Your eye doctor measures how much the cataract is affecting your vision using a chart and a special light, and you decide together whether now is the right time.

Many people have cataracts for years without surgery. If your vision is still good enough for your needs, waiting is safe. The cataract will not damage your eye by sitting there. Surgery becomes urgent only if the cataract causes other problems, such as inflammation or a sudden rise in eye pressure, which your doctor will tell you about.

The decision is yours. Some people choose surgery as soon as vision starts to slip; others wait until it affects their independence. There is no "right" time — only what works for your life.

What Happens During Cataract Surgery

Your surgeon makes a small cut in the front of your eye, removes the cloudy lens, and puts a clear artificial lens in its place. The whole procedure takes about 15 minutes per eye. You are awake the whole time but given numbing drops so you do not feel pain — you may feel pressure or see light, but not discomfort.

Most cataract surgery is done as outpatient care, meaning you go home the same day. You cannot drive yourself, so you will need someone to pick you up. The eye is bandaged or covered with a protective shield when you leave, and you start using prescribed eye drops that day.

Your surgeon will tell you which eye is being done first and when the second eye will be scheduled. Most people have both eyes done, but not on the same day — usually one to three weeks apart so the first eye can heal while the second is treated.

What Is Recovery Like After Surgery

The first few days are the most restricted. You cannot get water in your eye, so you shower carefully and avoid swimming and hot tubs for at least a week. You cannot rub or press on your eye. You cannot do heavy lifting, strenuous exercise, or yard work for about four weeks — these activities raise pressure inside the eye and can harm the healing.

You will use antibiotic and anti-inflammatory eye drops several times a day for the first few weeks, following the exact schedule your surgeon gives you. Missing doses or stopping early can slow healing or cause infection. Your eye may feel scratchy, watery, or sensitive to light — this is normal and usually improves within a week.

Most people notice clearer vision within a few days, though it may take two to four weeks for vision to stabilize completely. You will have follow-up visits at one day, one week, and four weeks after surgery so your doctor can check that healing is on track. If you have pain, sudden vision loss, or heavy discharge, call your surgeon right away — do not wait for a scheduled visit.

Will I Need Glasses After Surgery

Almost everyone needs glasses after cataract surgery, even if they did not wear them before. The artificial lens your surgeon places is set for one distance — usually distance vision — so you will likely need reading glasses for close work. Some people choose a lens set for near vision instead and use glasses for distance.

Your eye prescription changes after surgery, so you cannot get new glasses until your eye has fully healed — usually four to six weeks after the operation. Your surgeon will tell you when it is safe to have your eyes measured for glasses. At that point, an optometrist or ophthalmologist can give you the correct prescription.

Some surgeons offer premium artificial lenses that correct astigmatism or allow you to see at multiple distances. These cost more than standard lenses and are not covered by Medicare or most insurance plans. Ask your surgeon which options are available and what the costs are before surgery.

Can Cataracts Come Back After Surgery

The cataract itself cannot come back because your surgeon removed the cloudy lens. However, the membrane that holds the artificial lens in place can become cloudy over time — this is called posterior capsular opacification, or PCO. It happens to about one in four people within a few years of surgery.

If PCO develops and blurs your vision, your eye doctor can treat it in the office with a laser procedure called a YAG capsulotomy. The laser makes a small opening in the cloudy membrane, restoring clear vision. It takes a few minutes, is painless, and you go home the same day. After the procedure, you may need to use eye drops for a few days and have your eye pressure checked.

PCO is not a complication or a sign that surgery failed — it is a known side effect that is easily treated. It does not mean you will need another surgery.

What Slows Down Cataract Growth

Wearing sunglasses that block ultraviolet (UV) light outdoors may slow cataract development, though it cannot stop it once a cataract has started. Look for sunglasses labeled as blocking 99 to 100 percent of UVA and UVB rays. Wearing a wide-brimmed hat also helps.

If you have diabetes, keeping your blood sugar in your target range may slow cataract growth. High blood sugar over time can speed up clouding. The same is true for smoking — quitting or not starting reduces your risk of cataracts and slows growth if you already have one.

There is no medicine, supplement, or eye drop that stops or reverses a cataract. Claims about special drops or vitamins that dissolve cataracts are not supported by research. Once a cataract forms, surgery is the only way to remove it.

Frequently Asked Questions

Can I drive with a cataract?

That depends on how much the cataract is affecting your vision and your state's vision requirements for driving. Your eye doctor can test whether your vision meets your state's standard. If it does not, you should not drive — cataracts can make it harder to see at night, judge distances, and spot movement. Talk to your doctor about when it is safe to stop driving and when surgery might help you drive again.

Is cataract surgery painful?

No. Your eye is numbed with drops before surgery, so you should not feel pain — only pressure or awareness of movement. If you feel sharp pain during surgery, tell your surgeon when ready. After surgery, mild scratchiness or irritation is normal for a few days, but severe pain is not and should be reported to your surgeon right away.

How long does it take to see clearly after surgery?

Most people see improvement within a few days, but vision continues to improve for two to four weeks as the eye heals and swelling goes down. Your final vision may be different from what you expected if you have other eye conditions like macular degeneration or diabetic retinopathy. Your surgeon can discuss what to expect based on your eye health before surgery.

What if I have cataracts in both eyes?

Both eyes are usually treated, but not at the same time. Your surgeon will do one eye first, let it heal for one to three weeks, then do the second eye. This way, you always have one eye healing while the other is already clear, and your surgeon can make sure the first eye healed well before operating on the second.

Can I prevent cataracts?

You cannot prevent cataracts completely — they are a normal part of aging for most people. You can reduce your risk by wearing UV-blocking sunglasses, not smoking, managing diabetes and high blood pressure, and eating a diet rich in fruits and vegetables. These steps may delay cataract development, but they do not may provide you will never get one.