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Каква вътреочна леща да изберем? Вътреочните лещи са изкуствени лещи, които заместват естествената леща, премахната при операция на катаракта. Те биват различни видове. Коя е най-подходящата леща за Вас решавате заедно с Вашия офталмолог, който се съобразява с Вашия начин на живот, диагноза, желания и др. Монофокалните лещи имат една точка за фокусиране и могат да предоставят ясно зрение за далеч. Въпреки подобреното зрение надалеч пациентът ще има нужда да носи очила за определени дейности, като четене или работа с компютър. Специалният дизайн на повърхността на изкуствената леща може да подобри функционалното зрение при неблагоприятни светлинни условия, като например в полумрак или в мъгла. Мултифокалните лещи и лещите, коригиращи астигматизъм, са създадени за пациенти със или без катаракта, които не желаят да носят очила. Те могат да заместят естествената леща и да коригират и пресбиопията (старческо далекогледство). С тях Вие ще виждате еднакво добре наблизо и надалеч без очила. Новаторската технология на мултифокалните лещи позволява на пациентите да виждат ясно след операцията както наблизо, така и надалече, без да е необходима корекцията с очила. Лещите, коригиращи астигматизъм, са специално разработени за пациенти с катаракта и роговичен астигматизъм. Подобно на монофокалните лещи, и този вид лещи осигуряват качествено зрение за далеч, с по-малка зависимост от очила. Мнозинството от пациенти обаче все още се налага да носят очила за активности като четене или работа с компютър. Възвърнато качество на живота Лещите, коригиращи астигматизъм, предлагат качествено зрение за далеч. Те имат вградени UV и жълт филтър срещу опасната за ретината синя светлина. Мултифокалните торични лещи са създадени за пациенти с астигматизъм, които не желаят да носят очила за близо и далеч, независимо дали имат катаракта, или не. Те могат да заместят естествената човешка леща и да коригират пресбиопията, давайки изключителна острота на зрението на всички разстояния – близко, средно и далечно. При повечето операции имплантираме монофокални лещи. При този тип лещи се получава много добра корекция на зрението за далечно разстояние. Поради това, че тези лещи имат фиксиран фокус, който обикновено се изчислява за виждане надалеч, пациентът трябва да ползва очила за четене или работа от близко разстояние. При мултифокалните лещи се постига добра зрителна острота както за близко, така и за далечно разстояние, поради факта, че оптичните им свойства могат да разделят светлината на повече от един фокус при различна осветеност на околната среда.
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Do I have cataracts? Cataracts are one of the leading causes of vision impairment in the United States. A natural part of aging, a cataract is a clouding of the lens inside your eye. If you are over 55, there’s a good chance that you may have some form of cataracts. Because they form slowly over a long period of time, many people suffer from this condition without ever realizing it. When the lens becomes clouded with a cataract, it prevents lights and images from reaching the retina. Vision with cataracts has been described as seeing through a cloudy or foggy window. If you experience any of these symptoms, you may have cataracts: - Blurry or foggy vision - Colors appear dull, washed out or faded - Poor night vision - Halos appear around lights - Sensitivity to sunlight or bright lights - Needing more light to read - Your glasses don’t seem to work If left untreated, the clouded areas of your lens can become larger and denser, causing your sight to become worse. This can take months to many years. Eventually, your entire lens can cloud over and cause blindness. More than three million cataract procedures are performed each year in the United States alone. If you think that you may have cataracts, contact our office to schedule an evaluation. Treating Your Cataracts The only way to truly correct your vision is to remove your clouded lens and replace it with a new, artificial one. It’s a safe, simple procedure that can be performed as soon as your vision interferes with your daily life. Today, patients can choose from a variety of replacement lenses (IOL-intraocular lens). When preparing for your traditional or laser cataract procedure, remember the following: - You will need someone to drive you to and from the surgery center. No overnight stay is required and the whole process usually lasts less than 30 minutes. - Before and/or after surgery, your doctor will likely prescribe eye drops to help prevent infection and reduce swelling for faster recovery. - Most patients experience improved vision very soon after surgery. Your sight may continue to steadily improve. - One eye is treated at a time to give the eye adequate time to recover and stabilize before treating the other. This usually takes several weeks. Following your procedure, your brain will have to learn how to work with your new artificial lens. It may take a few weeks or even months for your vision to be optimal. Talk to our doctors about the risks and benefits of cataract procedures so you can make an informed decision about your options. Which Replacement Lens is Right for Me? Because of the options available, there has never been a better time to have cataract surgery. An intraocular lens, known as an IOL, is an artificial lens used to replace your cloudy natural lens. Today’s options with IOLs offer an opportunity to correct other vision problems. Because no single lens is right for everyone, our doctors will determine which lens is the most appropriate option for you. Monofocal Lenses These lenses have a single focal point for clear distance vision. While distance vision is improved, most patients still need to wear glasses for near vision activities, like reading. Your doctor will help you determine which lens is best for you based upon your eyes, your visual needs and your preferences. Astigmatism-Correcting Lenses This type of lens is specifically designed for patients with astigmatism. They are similar to monofocal lenses as distance vision is improved and most patients will still need to wear glasses for up-close tasks, like reading. Your doctor will help you determine which lens is best for you based upon your eyes, your visual needs and your preferences. Multifocal Lenses These lenses are designed to provide a full range of clear, sharp vision. They can correct for nearsightedness, farsightedness and presbyopia. Your doctor will help you determine which lens is best for you based upon your eyes, your visual needs and your preferences. Cataract Surgery Options During cataract surgery, the natural lens of your eye is removed and replaced with a clear artificial lens called an intraocular lens implant. There are two approaches – traditional and advanced laser assisted. The traditional surgical process involves a small incision phacoemulsification technique which many eye doctors refer to as micro-surgery. This means that the cataract surgery is performed using the smallest possible incision and removal of the lens material is accomplished using an ultrasonic needle. Once the eye has been properly dilated, the eye is then prepared with a cleaning solution. Topical anesthetic is then administered to the surface of the eye. Next, under a microscope, an incision of less than 3 millimeters in length is created at the junction of the cornea (the clear structure on the front of the eye) and the sclera (the white part of the eye). After the incision is made, another dose of anesthetic is administered inside the eye. The front part of the lens envelope, known as the lens capsule, is carefully opened so that the lens material can be removed. This is accomplished using a needle-like ultrasonic device, which pulverizes the hardened and yellowed lens proteins known as the cataract. The pulverized material is simultaneously vacuumed from the eye. Once the cataract material has been removed, a foldable (IOL) intraocular lens is inserted through the main incision and positioned into the lens capsule. The lens will remain inside your eye in this location without moving. Intraocular lenses cannot be felt or sensed in any way by the patient. There are different options for the replacement lens that may enable vision without glasses after surgery. Source: 2013 Novartis 11/13 IOL13075PA