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Extended Range Lenses

Clear Vision for far and near

Extended Range Lenses (ERLs) for Cataract Surgery

Cataract surgery is a common treatment in which the clouded lens of the eye is removed and replaced with a lens implant known as an intraocular lens (IOL). Extended Range Lenses (ERLs) are a form of intraocular lens that may give good vision at varied distances, making them a popular choice for patients who wish to lessen their reliance on glasses or contact lenses following cataract surgery.

What are Extended Range Lenses?

Extended range lenses are a specific type of intraocular lens (IOL) that are meant to enable clear vision at a variety of distances in patients that have cataract. Since these patients lost their near vision, it would be ideal if cataract surgery could restore both near and distance vision.

These lenses work best for intermediate (Computer work) and distance vision. Although they also help with near vision, it is not what they do best and it might be better to use multifocal lenses for this purpose. Although they might sometimes be referred to as “multifocal” lenses, this is not an accurate description. Multifocal lenses have a different mechanism of action.

What are Extended Range Lenses?

Extended range lenses

Your Vision with Cataract

Your Vision with Monofocal Lens

Your Vision with Multifocal Lens

Types of Extended Range Lenses

There are several types of extended range lenses available, including:


Accommodating Lenses

Accommodating lenses are meant to change their shape and lens power in reaction to the natural muscles of accommodation in the eyes in order to focus at varying distances, much like the natural lens of the eye. They modify the lens shape using the eye’s natural focusing process, enabling patients to view things at varied distances without the need for glasses or contact lenses. However, this is an aged product and except in specific circumstances, there are better options for vision correction available to patients today.


Extended Depth of Focus Lenses

Extended depth of focus lenses are intended to give clear vision at a variety of distances while having fewer discrete zones of vision correction than multifocal or trifocal lenses. They function by extending the focus range of the lens using a proprietary technology, resulting in a more natural and continuous range of vision correction.


Multifocal Lenses

Dr. Cohen prefers not to classify multifocal lenses under this broader category. But they are mentioned here anyway for purposes of comparison. In short, they correct eyesight in several zones, enabling patients to see well at various distances most often with excellent reading vision. They focus on objects at various distances by utilizing the optical properties of both diffraction and refraction on different sections of the lens.

Benefits of Extended Range Lenses

The main advantage of extended range lenses is that they may give good vision at a variety of distances, decreasing or eliminating the need for glasses or contact lenses. This is especially advantageous for people who have relied on glasses or contact lenses for the most of their lives. As compared to typical monofocal lenses, Extended Range Lenses (ERLs) may also deliver higher visual acuity and overall visual quality.

Risks and Considerations

Although extended range lenses have numerous advantages, they may not be appropriate for all patients. Extended Range Lenses (ERLs) may not be appropriate for patients with certain eye problems, such as severe astigmatism or diseases that affect vision like macular degeneration. Extended Range Lenses (ERLs) may also be more costly than regular monofocal lenses and are generally not fully covered by insurance.

Extended range lenses are also more likely to cause optical side effects such as halos, glare, and decreased contrast sensitivity in specific groups of patients. These side effects are more prevalent in the early phases of recovery and may be addressed with adequate follow-up treatment and lens prescription modifications. In rare cases an intraocular lens (IOL) exchange procedure might become necessary.

Choosing the Right Extended Range Lens

The correct extended range lens is determined by a number of criteria, including the patient’s age, lifestyle, eye health, and visual demands. Patients may review their choices during their consultation with their surgeon and choose the lens that is most suited to their requirements. Reasonable expectations, your surgeons’ experience with a wide range of lenses and a detailed discussion about the benefits and the risks will result in happy outcomes.

Extended range lenses are an excellent option for patients who want to reduce their dependence on glasses or contact lenses

Choosing the Right Extended Range Lens

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When looking for a doctor to do my LASIK surgery, I was searching for someone with deep subject matter expertise, who is precise with a high degree of attention to detail, and who enjoyed and was enthusiastic about what they did.

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I met Dr. Cohen through the recommendation of one of my ophthalmology friends when I was looking to get LASIK surgery. I am 20/15 in both eyes and have never had a problem. Thank you Dr. Cohen!

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I chose Dr. Cohen for my cataract surgery with a multifocal lens implant because over the last 20 years of knowing him and referring many of my patients to him, he never made a mistake. I couldn’t be happier with my vision.

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Dr. Ilan Cohen is one of the finest surgeons I could possibly imagine. He has done multiple surgeries, he’s handled incredibly complicated cases. He is one of the finest doctors and I am more than happy to recommend him.

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When it comes to mine or my family’s eyes, Dr. Cohen is my number one choice. Why? Because I have seen his results, and they are far superior than most surgeons in the area. If you want the best results, it’s Dr. Cohen that you have to go to.

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Dr. Cohen is one of the finest surgeons I know. I have seen plenty of his LASIK post op results which have been excellent. I would not hesitate to send any of my family members to him. 

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I have known Dr. Cohen for over 10 years through his reputation and personal interaction. He is one of the best surgeons that I know. When working on a complicated case, I will call Dr. Cohen because his opinion is very important to me.

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I have co-managed hundreds of patients with Dr. Cohen who have had all kinds of refractive surgery. Each procedure is tailored to the patient's particular eye. 

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I have been the director of an ophthalmology surgical center for the last 30 years. I personally know over 100 eye surgeons. If a member of my family needed eye surgery, Dr. Cohen would be the one to perform it.

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I've been an optometrist for 19 years, and I've worked with a number of different surgeons. I think Dr. Ilan Cohen has some of the best hands that I've ever seen.

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When I think of doctor Ilan Cohen, I think of the best. Dr. Cohen and I have been involved in some of the most exciting research projects. Dr. Cohen, in my opinion is one of the best surgeons on this plant.

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