A patient-education YouTube video (creator: Kathryn Najafi, MD) explaining cataract surgery and the use of a multifocal intraocular lens (IOL). It describes how cataracts cloud the natural lens, outpatient phacoemulsification procedure under local anesthesia (drops or injection), removal of lens fragments by suction, and permanent implantation of an IOL. The multifocal IOL has concentric focal zones that allow near and distance vision and can reduce dependence on reading glasses, though patients must adapt. The video lists general surgical risks (infection, bleeding, corneal or retinal swelling, retinal detachment, increased eye pressure, drooping eyelid, double vision, vision loss, need for more surgery) and multifocal-IOL-specific side effects (glare, halos, ghost images, peripheral black crescent, lens dislocation or need for replacement). Viewers are encouraged to ask their ophthalmologist about concerns and expectations.
Chapters
Cataract surgery is a very common procedure. This is when your eye surgeon removes the cloudy natural lens from your eye and replaces it with an artificial lens. Normally, the eye's lens is clear, allowing light rays to pass through and focus as they should on the retina. As a cataract forms, the lens gradually becomes cloudy. As light passes through this cloudy lens, it cannot focus clearly on the retina and objects look hazy or blurred. Cataract surgery is usually done as an outpatient procedure so you can go home afterwards. Your eyes will be numbed with either eye drops or an injection of medicine so that you don't feel any pain. During cataract surgery, your ophthalmologist will make a small opening in the side of your cornea. He or she will insert a pen shaped instrument through the opening to reach the lens. This instrument uses a special type of energy to break up the center of the cloudy lens. Then it will carefully suction out the lens pieces. Your surgeon will then insert an artificial lens called an intraocular lens, or iol. This IOL will stay in your eye permanently. The new lens lets light pass through and focus properly on the retina, bringing back clear vision. Once the IOL is in place, your ophthalmologist will close the incision, either with or without stitches. After surgery, a plastic shield may be placed over your eye to protect it. The lens you will have implanted is called a multifocal lens. This lens has focal zones or rings that allow you to see clearly at both near and far distances. This design means you can be less dependent on reading glasses. With a multifocal iol, your brain learns to automatically select the focus you need for the activity you are doing. It may take a little time to adjust to this way of seeing. For instance, you will need to learn how far away from your eyes to hold a menu or a book. But as you adjust, you may find you need reading glasses less often. As with any surgery, there are possible risks with cataract surgery. Cataract surgery risks may include infection in the eye, bleeding in the eye, swelling of the cornea, swelling of the retina, retinal detachment, where the retina lifts up from the eyewall. People who are very nearsighted are more at risk for this. Pieces of the cloudy lens left inside the eye, increased pressure in the eye, drooping eyelid, seeing double, losing some or all of your vision and needing to have more surgery. The multifocal IOL may cause some side effects or problems. Experiencing more glare. Seeing halos or rings around lights at night seeing double or ghost images, seeing a black crescent shape in your side vision, and having the lens move out of position or need to be replaced. The only way to remove a cataract is with surgery. You do not have to have a cataract removed. However, without surgery, your vision will probably continue to get worse each year. Millions of people find that cataract surgery improves their vision and their quality of life. If you have any questions or concerns about the procedure, ask your ophthalmologist. He or she will be happy to help you understand what to expect from cataract surgery. Also, if you have any questions or concerns about your eyes or your vision in general, don't hesitate to bring them up. Your ophthalmologist is committed to protecting your site.
