Cataract: symptoms, surgery and lens types explained

At a glance

What is it? A clouding of the eye's lens (cataract), usually age-related. Vision slowly becomes blurry, as if through a grey veil.
Main symptom Gradually blurred vision, paler colours and increasing sensitivity to glare. There is no pain.
Treatment There is no effective medication. The only treatment is a short operation, one of the most common procedures in Germany.
Costs Statutory insurance covers the operation with a standard lens. Premium lenses or a laser cost an extra fee that you pay yourself.

What is a cataract?

In a cataract, the normally clear lens of the eye becomes cloudy. It works like a camera lens: when it turns milky, less light reaches the retina and the image becomes blurred. In the vast majority of cases the cause is simply age. From around the age of 60, the lens slowly changes in many people, and this age-related cataract accounts for about 90 percent of all cases. Less often, UV light, smoking, diabetes, certain medicines such as cortisone or eye injuries play a role.

A cataract develops gradually and painlessly, often over years. That is exactly why it is frequently noticed late. Millions of people in Germany are affected, and cataract surgery is among the most common procedures of all.

It is important to distinguish this from glaucoma: despite the similar German names, it is a completely different condition. Glaucoma damages the optic nerve, usually through raised pressure in the eye. A cataract, by contrast, affects the lens. The two have nothing to do with each other, except that both threaten your sight.

Record changes in vision before you see the eye doctor

Because a cataract develops slowly, it helps to note changes in your vision and open questions. That way you go well prepared into the conversation about lens type and costs. With brite you record this in one place, free of charge.

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Symptoms: how do I recognise a cataract?

The complaints come on slowly and often affect just one eye at first. Typical signs are:

  • Blurred vision, as if looking through frosted glass or a grey veil
  • Fading contrasts and paler colours, often shifted toward yellow
  • Increasing sensitivity to glare, for example from the sun or oncoming headlights
  • A growing need for light when reading and trouble seeing at dusk
  • Frequently changing glasses prescriptions that no longer really improve vision
  • Sometimes double contours or double images in one eye only

Because a cataract causes no pain, the brain compensates for the gradual decline for a long time. It often only becomes noticeable when you cover one eye and compare with the other. Anyone over 50 should therefore have regular eye check-ups, even if vision still seems fine.

The surgery: a realistic step-by-step course

Cataract surgery is a routine procedure with very good results. The principle: the clouded natural lens is removed and replaced with a clear artificial lens. Here is how it works in practice:

  1. Pre-examination and choice of lens: The eye is measured (biometry) to calculate the power of the artificial lens. Together with the eye doctor you decide on the lens type and target refraction and are informed about the course, risks and costs.
  2. On the day of surgery: The procedure is usually done as an outpatient. The eye is numbed with drops, and if you wish, light sedation is added. The pupil is dilated, the eye disinfected and covered sterile. You are awake but feel no pain.
  3. The procedure (about 15 to 20 minutes): Through a tiny, self-sealing incision in the cornea, the clouded lens is broken up by ultrasound and suctioned out. This is called phacoemulsification. The back lens capsule stays in place as a holder. Through the same small incision, the folded artificial lens is inserted and unfolds into position.
  4. Right afterwards: Usually no stitches are needed. An eye shield is worn briefly, and you can go home the same day, but should be picked up.
  5. First check and second eye: The first check follows the day after surgery. Many people see more clearly within hours to days. The second eye is usually operated on a few days to weeks later.

A note on the often advertised laser method: the femtosecond laser is used in fewer than 2 percent of cases in Germany and is not the standard. The established ultrasound method is considered safe and delivers very good results.

Which lens suits me? The lens types compared

The artificial lens stays in the eye for life. Which type makes sense depends on your eyes and your everyday life.

Lens type What it can do Costs
Monofocal lens Sharp vision at one distance, usually far. Glasses are still needed for other ranges. Covered by statutory insurance
Toric lens Also corrects astigmatism. Extra fee
Multifocal or trifocal lens Several focal points, often glasses-free. Stronger glare and halos at night are possible, however. Extra fee
EDOF lens A continuous range from far to intermediate, with fewer halos. Glasses may still be needed for near vision. Extra fee

The monofocal lens is the reliable standard option with a very predictable result. Premium lenses can bring more freedom from glasses, but not without trade-offs. Honest advice weighs these pros and cons for your situation.

What does the surgery cost? Cover, extra fees and IGeL

The basic rule is simple: cataract surgery is medically necessary and therefore covered by statutory health insurance. This applies to the procedure itself, the standard lens (monofocal lens) and the pre- and post-examinations. As a statutory patient you usually pay nothing for this.

Extra costs only arise when you go beyond this base. This includes premium lenses (toric, multifocal, EDOF), the femtosecond laser and some special diagnostics offered as an individual health service (IGeL). Important and often misunderstood: since a change in the law, as a statutory patient you only pay the extra cost of a premium lens compared with the standard lens, not the whole operation.

Service Own share per eye (guide values)
Surgery plus standard lens (monofocal) Usually nothing, covered by insurance
Toric lens Extra fee, often about 500 to 1,000 euros
Multifocal, trifocal or EDOF lens Extra fee, often about 1,000 to 2,500 euros
Femtosecond laser (optional) Extra fee, often about 900 to 1,300 euros

These figures are guide values only and vary by practice, lens and effort. The only binding figure is an individual cost estimate, which you receive before the operation. Clarify cover in advance with your insurer, and for privately insured people with your specific plan. And remember: premium services are voluntary. The standard care delivers a very good result, and you do not have to take any add-on.

Do not forget the eye drops after surgery

After the operation, different eye drops are needed over several weeks, often several times a day and on a tapering schedule. brite reliably reminds you of every application and checks for interactions with your other medicines.

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After surgery: healing and after-cataract

Healing is usually uncomplicated. In the first weeks the following applies:

  • Use the eye drops exactly as prescribed, they protect against inflammation and support healing
  • Do not rub the eye and keep water or soap out of it
  • Avoid swimming pools, saunas and heavy lifting in the first weeks
  • Keep the check-up appointments, usually the next day and after a week and a month

A common but harmless late effect is the after-cataract. Here the back lens capsule clouds over months to years after surgery, and vision gets worse again. The treatment is simple: a laser opens the clouded capsule in a few minutes, as an outpatient, painlessly and covered by insurance. A new operation is not needed for this.

Warning signs after surgery

Complications are rare and most courses are uncomplicated. With these signs, however, you should not wait but see your eye doctor or the emergency eye service right away: a sudden drop in vision, increasing pain or redness of the eye, and flashes of light or a shadow or shower of spots in the field of vision, which can point to a retinal detachment.

Frequently asked questions about cataract

No. The eye is numbed with drops, and if you wish, with light sedation as well. You are awake but feel no pain, at most a slight sense of pressure.
The procedure itself takes about 15 to 20 minutes per eye and is usually done as an outpatient. Both eyes are mostly operated on a few days to weeks apart.
The operation with the standard lens (monofocal lens) is covered by statutory health insurance. Premium lenses and a femtosecond laser are add-ons. As a statutory patient you only pay the extra cost compared with the standard lens.
There is no generally best lens. The monofocal lens is very reliable but usually still requires glasses. Premium lenses offer more freedom from glasses but can cause more glare at night. The choice depends on your eyes, your everyday life and your budget.
When the loss of vision bothers you in everyday life. You do not have to wait until the cataract is ripe. What matters is the impact on quality of life, not a fixed point in time.
Many people see more clearly within a few hours to days. Full stabilisation takes a few weeks, supported by eye drops and a little rest.
The artificial lens does not cloud again. Months to years later, however, the back lens capsule can cloud over, the so-called after-cataract. It is treated in a few minutes as an outpatient, painlessly, with a laser.
A cataract is a clouding of the eye's lens. Glaucoma is damage to the optic nerve, usually from raised pressure in the eye. Despite the similar German names, they are two completely different conditions.

Prepared before surgery, reliable afterwards

From the first symptom to aftercare: with brite you keep the overview.

  • Record changes in vision and questions for the eye doctor
  • Reminders for the eye drops after surgery, even on a tapering schedule
  • Interaction check for all medicines in one place
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Sources

  1. BVA and DOG: Guideline No. 19 and 19a, Cataract (grey star) in adults and its surgery.
  2. Verbraucherzentrale: Cataract, cost transparency before surgery (2026).
  3. Charite Berlin, Department of Ophthalmology: Cataract, surgical technique and complications.
  4. MSD Manual, Professional edition: Cataract (2025).

This article is for general information only and does not replace ophthalmological advice, diagnosis or treatment. Cost figures are non-binding guide values and may differ, the relevant figure being an individual cost estimate. With a sudden loss of vision, pain or warning signs, contact an eye practice or the emergency service right away.