Previously, people who had cataract surgery could only see far away and had to wear glasses for near vision. Now with refractive phaco, after surgery, patients can see clearly at all distances.
April 19, MSc.BS. 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 becoming increasingly common among younger people.
Cataract, also known as cataract, cataract, or dry cataract, is a vision disorder caused by changes in the protein structure of the lens under the influence of harmful substances produced from the outside. within the body or from the external environment.
Disturbed protein structure changes the curvature, clarity, elasticity and thickness of the lens, making the lens opaque, blocking light from passing through, leading to reduced vision. Patients have difficulty with daily activities such as driving, reading, etc., and can even become blind if not treated appropriately.
Artificial lens replacement surgery is the last method to bring light back to the patient. An artificial lens (Intraocular lens – IOL) is an intraocular lens sized to fit the human eye, made to replace the natural lens that becomes cloudy after surgery.
“In the past, people with cataracts often had to wait until they were ‘nearly blind’ before they dared to have surgery because after surgery their eyesight only helped them see far away. If they wanted to read books (close vision) or watch TV (intermediate vision), they had to wear additional glasses. glasses,” Dr. Sanh said, adding that now a new generation of IOLs has been born, overcoming this drawback.
Patient after phaco surgery at the hospital. Image: Hospital provided
In terms of function, IOLs are divided into two types: monofocal and multifocal. Monofocal IOL allows all light to focus at one point and the patient can only see at a certain distance, usually for distance vision. Multifocal IOLs can be bifocal (bifocal) allowing light to focus at 2 points of near and far vision, while (trifocal) can also help see at intermediate distances.
Although monofocal IOLs have many advantages such as 100% of light being absorbed, the patient’s vision achieves maximum contrast and sharpness at a certain distance. Therefore, after surgery, patients adapt quickly and usually have no discomfort. However, if you want to read a book (see up close 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 IOLs with many outstanding advantages, bringing comfort to help patients see at all distances. , meets all daily needs without wearing glasses.
In addition, asymmetric multifocal IOLs also bring many benefits to cataract patients with combined eye fundus disease to be examined and intervened without obstructions like other generations of multifocal IOLs.
Currently, over 60% of cataract patients undergoing surgery at this place use asymmetric refractive multifocal IOLs, and are eligible for health insurance benefits.