Facts about Cataracts
Treatment Method: | Lens implantation (intraocular lens) |
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Symptoms: | Blurred vision, light sensitivity, double vision, so-called halos (light rings around the image source), frequently affected adaptation to bright/dark environments and depth perception, reduced color and contrast vision |
Treatment Duration: | Approx. 15 minutes |
Anesthesia: | Locally numbing eye drops |
Clinic Stay: | Outpatient |
Aftercare: | Rest, protect eyes by wearing sunglasses, no rubbing of eyes, no washing hair or showering for 24 hours, return to work after 2-3 days, avoid hobbies with infection risk for several weeks |
Cataract, also called “grey star” or “katarakt,” refers to a progressive clouding of the body’s natural human lens. This leads to worsening vision, reduced color perception, and increased light sensitivity—especially at night and when driving. Since nearly everyone develops cataracts during their lifetime, the therapy—known as cataract surgery—is the most common surgical procedure worldwide.
Symptoms
Unlike glaucoma, with which it should not be confused, vision impairment in most cases of cataracts is reversible, and visual acuity can be fully restored. Affected individuals usually experience some blurriness at first and may have light sensitivity. Double vision and so-called halos (rings of light around a light source) can occur. Finally, light/dark adaptation is often impaired, and depth perception can also be significantly affected.
Causes
Cataracts most commonly develop with age but can also appear earlier. Typically, they develop over several months or even years.
Factors that promote cataract formation include UV radiation, diabetes mellitus, drugs, trauma, and smoking. As an occupational disease, cataracts mainly affect people working with hot materials (welding, blast furnace workers, glassblowers, etc.) or those exposed to high levels of UV radiation.
In children, cataracts are rare but can result from rubella infection during pregnancy.
The clouding of the lens is mainly caused by a disturbance in the molecular arrangement of the crystallin proteins that make up the eye lens.

Treatment
During cataract surgery, the naturally aged and clouded lens is removed using the latest technology and replaced with a clear plastic intraocular lens (IOL). The operation is performed on an outpatient basis, usually under painless topical anesthesia, and takes about 15 minutes. Visual performance is often noticeably improved just hours after surgery.

More information on lens implants

INTRAOCULAR LENSES (ICL)
A minimally invasive procedure that ensures rapid healing while preserving corneal stability.

MULTIFOCAL LENSES
In addition to cataract treatment, these lenses are also suitable for treating high refractive errors and corneal astigmatism.
Frequently Asked Questions about Cataracts
What is a cataract and how can it be treated?
A cataract is a clouding of the lens and can be easily recognized in patients because the lens appears somewhat gray, almost foggy. This is also where the German name “Grauer Star” (meaning “Gray Star”) comes from. The term cataract means “waterfall” or “a rapid blocked by rocks.”
Since when has cataract disease existed?
Cataracts have been known and even treated since ancient times. In the Middle Ages, there were so-called "couchers" — scholars who used sharp instruments to push the clouded lens downward. This temporarily relieved the cataract, but the procedure left patients without a lens and thus severely visually impaired. Often, the lens would also slip back into place, meaning the cataract was not actually treated.
What to do about cataracts?
Nowadays, cataracts are well treatable. In most cases, the therapy involves replacing the eye’s natural lens with a new artificial lens. This procedure is now well established and achieves excellent results for patients. Often, with the implantation of special lenses during such a treatment, complete freedom from glasses can even be achieved.
We definitely recommend consulting your ophthalmologist at the first symptoms to obtain a reliable diagnosis.
What are the causes of cataracts?
Cataracts are a clouding of the lens. This occurs because the proteins in the lens, for reasons not yet fully understood, form crystals. Besides genetic predisposition, the natural aging process is also considered a cause of cataracts. It is believed that as we age, the lens receives fewer nutrients. The use of certain medications, eye injuries or diseases, UV radiation, existing diabetes, or exposure to glowing hot materials (e.g., glassblowers) are also known triggers for cataracts.
How does cataract manifest itself?
Cataracts usually present as reduced vision, particularly in low-contrast environments, fading colors, and blurry vision where the world appears as if seen through a veil. If you experience these symptoms, you should consult an eye doctor as soon as possible.
When should cataracts be treated?
Cataracts should be treated surgically when the clouding of the lens leads to a significant impairment in vision. Since the procedure places only minimal strain on the body, there is no age limit for the surgery.
What happens if cataracts are left untreated?
With cataracts, the loss of color vision gradually worsens over time. Visual acuity typically continues to decline as well. In severe cases, untreated cataracts can eventually lead to blindness.
What types of artificial lenses are available?
To correct more severe nearsightedness or farsightedness, so-called monofocal intraocular lenses are often suitable. If you want to achieve good vision at both near and far distances, multifocal intraocular lenses can offer a good solution. In addition to treating cataracts, multifocal lenses are also effective for correcting high refractive errors and astigmatism.
We will be happy to provide you with personal advice on the most suitable lenses for your individual case at our clinics in Linz and Vienna.
Can you see well immediately after the surgery?
On the first day after the operation, vision is already noticeably clearer. In the following days, it continues to improve gradually. The healing process is usually fully completed after about 4 to 6 weeks. By then, the eye has adapted to the new lens.
With multifocal intraocular lenses, it can sometimes take several months for the brain to fully adjust to the special optics of this lens type (a process known as neuroadaptation).
What are the costs of cataract surgery?
The cost of cataract surgery depends on the type of lens selected and the complexity of the treatment. However, statutory health insurance usually covers the cost of cataract surgery with standard lenses.
During a personal consultation, we will be happy to provide you with a detailed cost estimate tailored to your individual treatment.
Can cataracts come back after treatment?
After cataract surgery, around 20 to 30 percent of patients may develop what is known as a "secondary cataract" — a clouding of the remaining back part of the lens capsule. However, this can be quickly and easily treated with a simple laser procedure that restores clear vision within moments.
CONTACT
Ophthalmology Clinic Linz
Weissenwolffstraße 13, 3rd Floor
4020 Linz
Office Hours
Phone Consultation Hours
MON, WED, THU 09:00 AM – 6:00 PM
TUE 09:00 AM - 4:00 PM
FRI 09:00 AM – 12:00 PM
Appointment Days
By appointment only
Ophthalmology Clinic Wien
Habsburgergasse 10, 4th Floor
1010 Wien