The aging of the population and the demand for tasks that require good vision at intermediate distances, such as computer work and the use of mobile phones and other electronic devices, make it necessary to develop new treatments to improve the patient's quality of life .
From the age of 45, and in full productive age, the ability to accommodate distant and nearby objects is lost, a visual defect known as presbyopia. According to the Spanish Federation of Associations of the Optical Sector (FEDAO), 67.3% of the Spanish population has presbyopia, whose symptoms affect their quality of life and condition the development of daily and work tasks.
Until a few years ago, intraocular monofocal lenses were the most used permanent solution to end presbyopia and cataracts, but only corrected at a certain distance, whether near, intermediate or far, so patients still needed glasses to be able to see well at all distances.
Intraocular multifocal lenses
In recent years, a new generation of lenses has been developed that correct vision in multiple ranges, without the additional use of glasses or contact lenses: intraocular multifocal lenses. These lenses provide good vision at all distances and allow patients to read and work with the computer without the need to wear glasses.
The procedure of implantation of the multifocal lens has evolved dramatically in recent years and has become a mere outpatient surgery. The first step of the intervention is the rupture of the lens through ultrasound, a technique called phacoemulsification. After extraction by aspiration, the lens is replaced by the lens, which is injected into the folded eye through a small corneal incision.
The effectiveness achieved with the intraocular multifocal lens is very high, and results in a high degree of satisfaction for the patient. This is the result of clinical studies performed on people implanted with the lens, who state that for 93.1% of them surgery changed their overall vision in a very positive way. The results of these studies also indicate that 87.2% do not require the use of glasses at any distance. Thus, patients declare that they have no difficulties performing everyday tasks such as watching television, reading the time on the clock and using the computer or mobile phone without the need to wear glasses.
Currently, new advances in this field of eye surgery allow to correct also myopia, hyperopia and astigmatism. This is the case of the multifocal toric lens that, by means of a single intervention, solves these refractive defects at the same time as presbyopia and cataracts.
In Spain it is estimated that 20,000 patients are operated every year since this technology landed five years ago in our country, and it is estimated that due to the progressive aging of the population and the increase in life expectancy the figures will increase significantly in the next years.