New technique helps cataract surgery patients not have to wear glasses

Previously, people who had cataract surgery could only see far away, and still had to wear glasses to see near. Now with refractive phaco, after surgery, patients can see clearly at all distances.

On April 19, Master, Doctor Nguyen Van Sanh, Director of Hanoi High-Tech Eye Hospital (Hitec), said that cataracts are the main cause of blindness, accounting for more than 60% of eye diseases and are increasingly affecting younger people.

Cataract, also known as cataract, cataract, dry cataract, is a vision disorder caused by changes in the protein structure of the lens under the influence of harmful substances produced from within the body or from the external environment.

The disordered protein structure changes the curvature, clarity, elasticity and thickness of the lens, making the lens opaque, obstructing the passage of light, leading to reduced vision. Patients have difficulty in daily activities such as driving, reading books and newspapers..., and can even go blind if not treated properly.

Artificial lens replacement surgery is the last method to bring light to the patient. An artificial lens (Intraocular lens - IOL) is an intraocular lens of the appropriate size to the human eye, manufactured to replace the natural lens that has become cloudy after surgery.

"Previously, cataract patients often waited until they were 'near blind' before daring to have surgery because after surgery, their vision only helped them see far away. If they wanted to read a book (near vision) or watch TV (intermediate vision), they would have to wear glasses," said Dr. Sanh, adding that now the new generation of IOLs has been born, overcoming this disadvantage.

Patient after phaco surgery at the hospital. Photo: Provided by the hospital — Patient after phaco surgery at the hospital. Photo: *Provided by the hospital*

In terms of function, IOLs are divided into two types: monofocal and multifocal. Monofocal IOLs allow all light to converge at one point and the patient can only see at a certain distance, usually for distance vision. Multifocal IOLs can be bifocal, allowing light to converge at two points for near and far vision, while trifocal can also help with vision at intermediate distances.

Although monofocal IOLs have many advantages such as 100% light absorption, the patient's vision achieves maximum contrast and sharpness at a certain distance. Therefore, after surgery, the patient adapts quickly and usually does not have any discomfort. However, if the patient wants to read (look near about 35 cm) or do other activities at intermediate distances (50-60 cm), the patient still has to depend on glasses.

Asymmetric rotating refractive multifocal IOL (Lentis comfort), manufactured using European technology, is a new generation of multifocal IOL with many outstanding advantages, providing comfort to help patients see at all distances, meeting all daily living needs without wearing glasses.

In addition, asymmetric multifocal IOLs also bring many benefits to cataract patients with associated fundus disease, allowing them to be examined and treated without being hindered like other generations of multifocal IOLs.

Currently, over 60% of cataract surgery patients here use asymmetric refractive multifocal IOLs, which are covered by health insurance benefits.

Le Nga

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