Bifocal vs. Laser: Multifocal Lens Options

In an era where a variety of vision problems such as nearsightedness, farsightedness, and presbyopia are combined, there arises a need for an integrative solution tailored to the complex reality of the modern eye. According to the World Health Organization, at least 2.2 billion people in the world suffer from vision problems, and they are looking for solutions that will allow them to see clearly at all ranges and under all conditions. Estimates suggest that only 36% of people with distance vision impairments due to refractive errors and only 17% of people with vision impairments due to cataracts have received appropriate treatment. This article will examine the various options available for treating these vision problems, including multifocal lenses and laser surgeries, and will analyze the advantages and limitations of each.

Who are bifocal lenses for?

Bifocal lenses are designed to correct vision for two ranges: near and far. They are perfect for people over the age of 40 who suffer from presbyopia, a phenomenon where there is a decrease in near vision ability. The bifocal lens has two clear segments: the upper for distance vision and the lower for near vision. The transition between the segments can be noticeable and has a visible line.

What are multifocal or trifocal lenses?

Trifocal lenses correct vision in three different ranges: close, intermediate, and far. Like bifocal lenses, they are divided into segments but include an additional segment for intermediate distance vision. The separate segments can create a "jump" in the image when transitioning between segments, but they provide an effective solution for those who need support in all three vision ranges.

*Multifocal lenses are lenses that provide correction for more than two conditions.

Are there multifocal contact lenses?

Yes, multifocal contact lenses exist and work similarly to multifocal glasses, providing a solution for people who need vision correction at several ranges: close vision, distance vision, and intermediate range. These lenses are uniquely designed to allow smooth transition between different vision ranges, offering the convenience of correcting multiple vision problems without the need for several types of glasses.

Multifocal contact lenses work by using concentric or aspheric designs, where each area of the lens focuses on a different vision range. For instance, the center of the lens might be intended for close vision, while the outer areas focus on distance vision. This allows the user to see clearly at various ranges without having to switch between different lenses or glasses. However, finding the right fit and prescription can be more challenging than with traditional contact lenses, and one must consider individual needs and the characteristics of the eye.

What are the disadvantages of multifocal lenses? 

Multifocal lenses offer an innovative solution for vision at multiple distances, but sometimes an adaptation period is required for the different viewing areas. During this period, which can last from one day to six weeks, one may experience blurry vision, dizziness, difficulty transitioning from distant to close vision, and problems with navigating stairs or identifying objects at floor level. Additionally, there may be glare in the dark during the adaptation period, but this effect eventually passes. The price of multifocal lenses is higher than other types of contact lenses due to their technological complexity and the lengthy fitting process. To facilitate easier adaptation, it is recommended to use the new lenses all day, establishing a regular routine for putting them on and taking them off, and to report any discomfort to the eye doctor.

Progressive lenses: A modern alternative

Progressive lenses provide a smooth and invisible transition between different vision ranges, unlike bifocal and trifocal lenses which have distinct lines separating the ranges. The main difference between progressive lenses and bifocal or multifocal lenses is the lack of dividing lines, allowing for more continuous and natural vision across all ranges. They are particularly suitable for people who need vision correction at multiple ranges and are looking for a visual experience without disturbances.

However, even progressive lenses require a challenging adaptation period, as there may also be feelings of dizziness or difficulty orienting in space during the transition between ranges of vision. It might be necessary to change the angle of the head in order to see clearly at different ranges. Additionally, the price of the lenses can be even higher than that of standard bifocal and trifocal lenses. Therefore, for some people, other solutions such as bifocal or multifocal lenses might be more suitable.

What are the costs?

Multifocal lenses can be quite expensive, with prices usually ranging from 1,000 to 4,000 ILS, but they can even reach up to 8,000 ILS. The high prices are attributed to several factors, including the thickness of the lens, the type of coating, the brand, and whether they belong to a new or old generation. The new generation lenses offer a wider field of vision and a smoother transition between different ranges of vision, but they come at a higher price.

Is laser surgery a more effective alternative?

In our journey to explore vision correction options, we consulted with the team of experts at Assuta Optic to understand the potential of laser eye surgery. Surgeries like LASIK and PRK, which use laser technology to reshape the cornea, have proven to be a popular alternative to glasses and contact lenses. The innovation in these surgeries is the potential to offer a permanent, not just temporary, solution to various vision problems.

According to data presented by the Assuta Optic team, laser surgery can be particularly effective for people with visual impairments such as myopia (nearsightedness) and hyperopia (farsightedness). The surgery provides a long-term and often a complete solution, thereby reducing dependency on glasses or contact lenses. "Laser vision correction surgery brings about an improvement in the quality of life for patients and is characterized by high success rates and patient satisfaction of up to 98%," says one expert. "Awareness of various complications that can impair vision and cause a range of symptoms is the foundation of our comprehensive process for understanding and managing complications before surgery, at the initial screening and fitting, during surgery at the technological and professional level, and after surgery by providing customized recommendations for each patient. All these are an integral part of the process and constitute a central component in the high success rates."

In addition, the experts noted that the popular reasons for choosing laser surgery include the desire to improve visual acuity, sports activities where glasses and contact lenses are disruptive, daily comfort and the prevention of dependency on glasses, problems with contact lenses, professional requirements, and aesthetic reasons. The freedom and convenience offered by laser surgery are significant factors in clients choosing this solution.

What problems does the surgery solve?

Laser surgery provides a solution for myopia, hypermetropia, presbyopia, and astigmatism.

Surgery cost compared to multifocal lenses

When comparing costs, the price of laser surgery ranges between 4,450 to 15,000 ILS, depending on the type of surgery and the technology used. For example, Trans-PRK surgery costs about 4,450 ILS under certain conditions, while Z-Lasik surgery costs about 6,450 ILS under certain conditions. This cost is considered a one-time expense, as the medical correction is for life. Partial funding by health insurance for this medical procedure should be taken into account.

On the other hand, multifocal lenses require frequent replacement and updates, and their costs range from 1,000 to 4,000 ILS and even more, depending on the model and quality of the lenses. For example, lenses from the latest generation with special coatings can cost up to 8,000 ILS. Overall, the recurring costs for these lenses can be higher over time when they need to be replaced or when the prescription needs to be updated regularly.

Reliability and suitability

However, despite all the advantages, laser surgery is not suitable for everyone. About 30% of the population are not suitable for surgery for medical reasons, which is why pre-surgery exams are critical.

Navigating through the options for vision correction can be crucial. Multifocal lenses, whether glasses or contact lenses[1], offer a convenient solution but at a significant price. Bifocals provide simpler alternatives but are sometimes less satisfying. Advanced lenses solve[2] some of the disadvantages of bifocals and multifocals but come with a price tag that not everyone wants to pay over time. On the other hand, laser surgery presents a permanent solution at a cost-effective price, although it is not universally suitable and requires a higher initial investment. Ultimately, the choice depends on individual vision needs, lifestyle, and budget.

The content on this channel does not constitute professional advice, recommendation, a substitute for consultation with an expert, or receipt of medical advice.