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General Eye Health

What Is Cataract? When Is Surgery Needed?

03/07/2026
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Cataract is the loss of transparency of the eye’s natural lens. The natural lens helps focus light onto the retina. When this lens becomes cloudy, vision may become blurred, hazy or dull. Cataract is most commonly related to aging, but it may also develop due to trauma, diabetes, long-term corticosteroid use, eye inflammation or previous eye surgery. In some babies, cataract may be present from birth.

What Are the Symptoms of Cataract?

The most common symptoms are blurred vision and decreased visual quality. Patients may describe hazy vision, difficulty reading, faded colors, glare from lights and reduced night vision. Some patients may need frequent changes in glasses prescription. In advanced cataract, vision may decrease significantly and daily activities may become difficult.

Does Cataract Always Require Surgery?

Not every cataract requires immediate surgery. If cataract is mild and does not significantly affect the patient’s daily life, it may be followed with regular examinations. Surgery is considered when cataract begins to interfere with daily activities such as reading, driving, working or recognizing faces, or when it prevents evaluation or treatment of other eye diseases.

When Is Cataract Surgery Performed?

The timing of surgery is determined individually. Visual acuity, cataract density, the patient’s visual needs, occupation, lifestyle and the presence of additional eye diseases are evaluated together. In some cases, delaying surgery for too long may make the operation technically more difficult. Therefore, timing should be planned with an ophthalmologist.

How Is Cataract Surgery Performed?

Modern cataract surgery is usually performed using phacoemulsification. The cloudy natural lens is fragmented and removed through a small incision, and an artificial intraocular lens is placed inside the eye. The procedure is generally performed under local anesthesia. In many patients, it can be completed without sutures and recovery is relatively rapid.

Why Is Lens Selection Important in Cataract Surgery?

The intraocular lens placed during cataract surgery remains in the eye permanently. Therefore, lens selection is an important part of surgical planning. Standard monofocal lenses, toric lenses for astigmatism, multifocal, trifocal or EDOF lenses may be considered according to the patient’s eye structure and visual expectations. Not every lens is suitable for every patient.

The Surgical Decision Should Be Individualized

The decision for cataract surgery should not be based only on the presence of cataract. The patient’s complaints, visual needs, eye structure, retina and corneal status, intraocular pressure and general health should be evaluated together.

Conclusion

Cataract is a common eye condition that can reduce visual quality. When it significantly affects daily life or eye health, surgery may be needed. Successful cataract surgery requires appropriate timing, detailed preoperative evaluation and individualized intraocular lens selection. This content is intended for general informational purposes only. Diagnosis and treatment decisions should be made after detailed eye examination and individualized assessment by an ophthalmologist.
Tags:blurred visioncataractcataract surgerycataract symptomsintraocular lensphaco surgery
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