The Multifocal Lens Mistake That Sends Patients to My Office

Ajouté : 2026-06-07

[00:00:00]Choosing the right lens for your cataract surgery is one of the most important decisions you'll ever make for your eyes. And some eyes should almost never get one particular lens, the multif focal. Choose wrong and the result can be heartbreaking. Let me show you what I mean. A man came to see me a while back. He'd had a cataract surgery somewhere else, a multif focal lens in one eye, but he wasn't seeing the way that he'd been promised. He had a lot of problems with severe glare at night and things looked generally hazy to the degree that he couldn't drive anymore.

[00:00:38]The other eye also couldn't see well because of cataract but he was hesitant to proceed with any surgery in that eye.

[00:00:45]And here's the part that stayed with me.

[00:00:48]Years earlier he had had LASIC which means his eyes were never the right fit for a multif focal in the first place.

[00:00:56]Nobody told him that before the surgery.

[00:00:59]I was able to fix it. And by the end of this video, I'll tell you exactly how and why he can drive again today. But first, you need to understand how he ended up there so it never happens to you. I have also implanted multif focal lenses in tens of thousands of surgeries. And the truth is the vast majority of patients walk away thrilled they did it. But I've also seen the heartbreak up close. As I often see patients who seek a lens exchange after their initial surgery elsewhere didn't provide the results they expected, a lot of that heartbreak was completely avoidable because those eyes were never the right fit for the lens in the first place. So today I'm going to walk you through five groups of people who should almost never get a multif focal lens.

[00:01:49]And stick around for the last one. It's the group patients underestimate the most. And even if you don't see yourself on this list, don't go anywhere because at the very end, I'll give you one simple question, just one sentence that protects every single person getting cataract surgery. No matter which group you're in, or even if you're in none of them. And if you see yourself on this list, please don't panic. There's a very good chance a different lens can still give you sharp, beautiful vision with little or no need for glasses. But you need to hear this before you ever sit down to choose because once that lens is in your eye, exchanging it is an extra surgery and it is a more complex surgery. So, who is this video for? If you're about to choose a lens for cataract surgery, this is for you. And if you already have a multif focal and something feels off, stay with me. I'll show you exactly what to do near the end. Hi, I'm Dr. Elon Cohen. I'm a boardcertified Carak and premium lens surgeon. Over the last 25 years, I've performed tens of thousands of cataract and lens surgeries. Let me be honest with you. I implant a lot of multif focal lenses every week, and I love them. I'm not here to scare you away from them, but I've also removed and exchanged more of them than almost any surgeon I know, including for patients who fly in from other states after being told nothing more could be done. And let me be clear about one more thing right up front. No company paid me to make this video. I don't have a financial deal with any lens maker. This is just what I've learned from real eyes, including the ones I've had to fix. Now before we get to the list, let me say the most important thing first. This is not about a bad lens. Multif focal lenses are brilliant. In the right eye, they can free you from glasses in a way that feels like magic. The problem is never the lens by itself. It's the lens in the wrong eye. And to understand why these five groups struggle, you only need one simple idea. A multif focal works by taking the light coming into your eye and splitting it into separate points of focus. Some light for far, some for the middle, and some for up close. So for it to work, the rest of the eye has to send a clean and strong signal. A healthy retina to catch the picture, a clear cornea to focus it, and a smooth, steady surface up front. Take away any one of those and now you're splitting light that was already weak or blurry. And that's exactly what goes wrong in these five groups I'm about to show you. Let's start with the first.

[00:04:40]Number one, anyone with moderate to advanced macular degeneration. Your macula is the tiny bullseye at the center of your retina. It's responsible for your sharpest, more detailed vision.

[00:04:54]macular degeneration slowly damages it.

[00:04:57]Now remember, a multif focal already gives up a little contrast to give you that fantastic range. Contrast is the richness that lets you teleport similar shades like a gray car on a gray road.

[00:05:10]And an eye fighting macular degeneration can't afford to give up any contrast it has left. These patients do far better when we send every bit of light to one strong point of focus. Which brings me to a condition that acts in a similar way, but for a very different reason.

[00:05:28]Number two, diabetic retinopathy. That's damage to the retina from diabetes.

[00:05:34]Diabetes can quietly hurt the tiny blood vessels that feed the retina. If you have active diabetic retinopathy, you should never get a multif focal lens.

[00:05:45]Here again, a less than perfect retina is not a good match and it can lead to great disappointment. Now, what if you have diabetes but no active retinopathy?

[00:05:57]If your blood sugar is in good control and you likely to stay that way, you may still benefit from a multif focal lens, but you should have an honest discussion about it with your surgeon. And the next group has nothing to do with the retina.

[00:06:12]It's about the front of the eye. Number three, anyone who had LASIK or a similar laser vision correction in the past.

[00:06:20]Don't get me wrong, LASIC is fantastic, but it works by reshaping your cornea, the clear front window of your eye, and that reshaping can leave the cornea a little bit irregular. Now you place a multif focal lens which has its own complex pattern on top of a cornea that already has one, the two patterns stack and you can end up with more glare, more halos and a result that's truly hard to predict. And this is exactly what happened to the man I told you about at the start. Multif focal lenses placed on eyes that already had LASIK for advanced myopia. the two patterns fought each other and that's what left him with that waxy vision and the glare that took away his driving. Now certain patients who had LASIC before may still be able to enjoy multif focal lenses depending on the prescription that was treated originally and the surface contour of your cornea. And speaking of the cornea that leads me to group four number four coral distrophies like fuches and corial scarring. Let me make that simple. In fugistrophe, the tiny palm cells that keep your cornea clear slowly fail. So the cornea can turn hazy and swollen, especially first thing in the morning.

[00:07:39]Scarring does something similar. It scatters the light before it ever reaches the lens. And splitting light as it passes through a foggy window only multiplies the problem. On top of that, some of these patients may need a cornea procedure down the road. That makes locking in a complex lens today a risky move. And this brings us to the last group, and it's the one that the patients underestimate the most. Real quick, if this is already helping you look at your own eyes differently, hit the subscribe button. I break this stuff down every week straight from the operating room. Okay, number five, severe dry eye. This one surprises people because they think of dry eye as just a nuisance. But your tear film, the tear layer of tears that coats the front of your eye, is the very first surface the light hits. When it's unstable, your vision flickers and blurs from one minute to the next. It also throws off the careful measurements we take before surgery, so we can't choose the lens as confidently. And a multif focal is the least forgiving lens of all when that front surface isn't smooth. Now, if your dry eye is mild and treatable, that's a different story. We can often calm it down first. It's the severe stubborn cases I'm warning you about here. So, if you've seen yourself in any of these five groups, here the part I really want you to hear. Being told no to a multif focal is not being told no to great vision. Not even close. For most of these patients, Edaf lenses, extended depth of focus lenses, could be an excellent choice. They handle light far more gently and protect your contrast.

[00:09:28]They can also give you great vision with little or no dependence on glasses. And then there are also the standard monopocal lenses if you don't mind wearing glasses at all. Either one gives you crisp, dependable sight, sometimes with a little extra range built in through the way we aim each eye.

[00:09:49]Remember, the goal is the clearest, most reliable vision for your eyes, not the fanciest lens. Here is exactly what to do and the one crucial question I promised you at the start. Before choosing a lens, ensure your surgeon has truly checked the three key areas. the health of your retina, the clarity of your cornea, and the stability of your tear film. Then ask them in plain words, "Are my eyes good candidates for a multif focal lens? Yes or no?" A good surgeon will welcome that question. If you do not get a confident answer, seek a second opinion before anything becomes permanent. Now, remember the man from the very start of this video, the one with the blurry vision who had given up driving? Here's how this story ends. I took the multif focal lens out and I exchanged it for a pure Cy lens. That's an EDOF lens, extended depth of focus lens. The same kind of gentle lens I just told you about. The lens I removed was called Panoptics Pro. The next time he came to see me, he was driving again and he was in his own words thrilled.

[00:10:58]He's not scheduled to have the second eye done. Now, if you're watching this video because you already had a multif focal and you're just not seeing the way that you wished, please don't lose hope.

[00:11:10]Taking these lenses out and exchanging them is a big part of what I do. Look at the link in the description below. Now, I want to hear from you. Comment the number you saw yourself in one through five or comment the word clean if you don't have any of these contra indications. And if someone you love is about to have cataract surgery, send them this before they choose. It could save them years of regret. If this helped you see your own eyes a little more clearly, subscribe and stay with me. Take care of those eyes and I'll see you in the next