1. Learn About Cataracts And Cataract Surgery - AllAboutVision.com A guide to the causes, symptoms and treatment of cataracts, including cataractsurgery. cataracts. Hazy or blurred vision may indicate a cataract. http://www.allaboutvision.com/conditions/cataracts.htm

Eye Health Topics Introduction Allergies Amblyopia or Lazy Eye AMD AMD News Astigmatism Cataracts Cataract News CMV Retinitis Color Blindness Conjunctivitis Crossed Eyes Diabetic Retinopathy Drooping Eyelids Dry Eyes Farsightedness Floaters and Spots Glaucoma Glaucoma News Keratoconus Light Sensitivity Macular Degeneration Nearsightedness Ocular Hypertension Pink Eye Presbyopia Ptosis Retinal Detachment Retinitis Pigmentosa Safety Strabismus Styes or AllAboutVision.com home Cataracts Hazy or blurred vision may indicate a cataract. By Judith Lee and Gretchyn Bailey ; reviewed by Dr. Vance Thompson A cataract is a clouding of the eye's lens, which lies behind the iris and the pupil. It works much like a camera lens, focusing light onto the retina at the back of the eye. The lens also adjusts the eye's focus, letting us see things clearly both up close and far away. The lens is mostly made of water and protein. The protein is arranged in a precise way that keeps the lens clear and lets light pass through it. But as we age, some of the protein may clump together and start to cloud a small area of the lens. This is a cataract, and over time, it may grow larger and cloud more of the lens, making it harder to see. A cataract is a clouding of the eye's natural lens.

2. Cataracts Fact Sheet and decreased. Although cataracts result from many conditions, themost frequent cause is the natural aging process. Other causes http://www.eri.harvard.edu/htmlfiles/cataract.html

Text Only Back to Your Eyes and You See also: Diagram of the Eye and Glossary of Terms Meet Rich Godfrey, our Volunteer Patient Liaison Topics: What is a Cataract? What Happens in Cataract Surgery? WHAT IS A CATARACT? A cataract is a clouding of a part of the eye known as the crystalline lens. The lens is a clear tissue located behind the pupil - the dark circular opening in the middle of the iris or colored part of the eye. The lens works with the transparent cornea, which covers the eye's surface, to focus light on the retina at the back of the eye. When the lens becomes cloudy, or cataractous, light cannot pass to the retina properly, and vision is blurred and decreased. Although cataracts result from many conditions, the most frequent cause is the natural aging process. Other causes may include injury, chronic eye disease, and other system-wide diseases such as diabetes. More than half the people over age 65 have some degree of cataract development. Cataracts can take from a few months to several years to develop. Sometimes, the cataract stops developing in its early stages, and vision is only slightly decreased. But if it continues to develop, vision is impaired, and treatment is necessary. Surgery to remove the diseased lens is the only effective treatment for cataract. Neither diet nor medications have not been shown to stop cataract formation. Cataract surgery is now a frequently performed operation in most parts of the world. More than one million cataract procedures are performed every year, and in the majority of those cases, the diseased tissue is replaced with an artificial device known as an intraocular lens implant.

3. Understanding Cataracts Understanding cataracts. How much do you know about sight problems? cataractscan form at any age, but most often develop as people get older. http://www.rnib.org.uk/info/cataract.htm

Search RNIB site for: Understanding cataracts How much do you know about sight problems? Blind people see nothing at all True False What is a cataract? If your doctor has told you that you have a cataract, don't be alarmed. Over half of those over 65 have some cataract development and most cases can be treated successfully with surgery. Despite what you may have heard, a cataract is not a skin that grows over your eye. A cataract is a clouding of part of your eye called the lens. Your vision becomes blurred or dim because light cannot pass through the clouded lens to the back of the eye. The lens The lens is a transparent body behind the iris, the coloured part of the eye. The lens bends light rays so that they give a clear image to the back of the eye - the retina. As the lens is elastic, it will change shape, getting fatter for close objects and thinner for distant objects. The diagram below shows the main parts of the eye. What causes a cataract? Cataracts can form at any age, but most often develop as people get older. In younger people they can result from an injury, certain drugs, long-standing inflammation or illnesses such as diabetes.

4. Cataracts Complete and organized information, diagrams and animations about cataract and its treatment. http://www.clinicareinoso.com/conditns/cataract.htm

CATARACT When the lens of the eye turns cloudy enough to impair vision, it is considered a cataract. Cataracts are the main cause of blindness worldwide. Four out of ten persons over 60 years old develop cataracts. Treatment consists of a safe and simple surgical procedure. How do cataracts lead to blindness? The lens of the eye is the structure in charge of focusing objects at different distances from the eye. It is capable of changing its shape to do so. With time, the lens looses its transparency turning opaque. At this moment it is called a cataract. Light is not able to reach the retina and vision diminishes even to the point of blindness. Click the green button several times to see this process. Who is at higher risk of developing cataracts? There are different kinds of cataracts; the most common of which are senile cataracts. These develop in people over 50 years of age. The lens looses its transparency due to damage to its fibers with time. This is because lens fibers are not replaced throughout life but instead new layers are added continuously. Ultraviolet light (sunlight), free radicals and oxidizing agents have been connected to age related cataract formation. Which are the symptoms of cataract?

5. Cataracts A graphic description of cataracts and available treatment options.Category Health Conditions and Diseases Eye Disorders Cataract......What is a cataract? When cataracts are mentioned, people often think of a filmthat grows on their eyes causing them to see double or blurred images. http://www.stlukeseye.com/Conditions/Cataracts.asp

Conditions Home Macular Degeneration Diabetic Retinopathy Dry Eye Syndrome ... Services Search Selected by the sciLINKS program, a service of National Science Teachers Association. What is a cataract? When cataracts are mentioned, people often think of a film that grows on their eyes causing them to see double or blurred images. However, a cataract does not form on the eye, but rather within the eye. Eye without a cataract Eye with a cataract A cataract is a clouding of the natural lens, the part of the eye responsible for focusing light and producing clear, sharp images. The lens is contained in a sealed bag or capsule. As old cells die they become trapped within the capsule. Over time, the cells accumulate causing the lens to cloud, making images look blurred or fuzzy. For most people, cataracts are a natural result of aging. In fact, they are the leading cause of visual loss among adults 55 and older. Eye injuries, certain medications, and diseases such as diabetes and alcoholism have also been known to cause cataracts.

6. NEI - Page Has Been Moved Learn how to prevent or correct this eye condition experienced by half of the population over 65. In large print for easy reading. lighting and eyeglasses may lessen vision problems caused by cataracts. At a certain point, however, surgery may http://www.nei.nih.gov/publications/cataracts.htm

Health Funding News Laboratories ... Help Viewing Site We've updated the NEI site.The page you have requested has been moved. Please update your bookmarks or links to the new URL, which is: http://www.nei.nih.gov/health/cataract/cataract_facts.htm You will be redirected to that page in 10 seconds. NEI Home Site Index Free Publications Contact Us ... Accessibility We welcome your questions and comments. Please send general questions and comments to the NEI Office of Communication, Health Education, and Public Liaison . Technical questions about this website can be addressed to the NEI Website Manager National Eye Institute 2020 Vision Place Bethesda, MD 20892-3655 www.nei.nih.gov d d

7. FAQs: Cataracts And Cataract Surgery - AllAboutVision.com cataracts Frequently Asked Questions. Reviewed by Dr. Vance Thompson 1. Whatexactly is a cataract? 2. Are cataracts found only in older people? 3. http://www.allaboutvision.com/faq/cataracts.htm

Other FAQs General FAQs AMD (macular degeneration) Cataracts Contact Lenses Diabetic Retinopathy Eyeglasses Glaucoma LASIK and PRK Sunglasses or AllAboutVision.com home Cataracts: Frequently Asked Questions Reviewed by Dr. Vance Thompson What exactly is a cataract? Are cataracts found only in older people? My doctor says I have a cataract, but he wants to wait a while before removing it. Why? ... What are possible side effects? 1. What exactly is a cataract? A cataract is a cloudiness of the eye's natural lens, which lies between the front and back areas of the eye. [top] 2. Are cataracts found only in older people? About half of the population has a cataract by age 65, and nearly everyone over 75 has at least one. But in rare cases, infants can have congenital cataracts. These are usually related to the mother having German measles, chickenpox, or another infectious disease during pregnancy, but sometimes they are inherited. [top] 3. My doctor says I have a cataract, but he wants to wait a while before removing it. Why? Cataracts usually start as very small and practically unnoticeable but grow gradually larger and cloudier. Your doctor is probably waiting until the cataract interferes significantly with your vision and your lifestyle. You need to continue to visit your eye doctor regularly so the cataract's progress is monitored. Some cataracts never really reach the stage where they should be removed. If your cataract is interfering with your vision to the point where it is unsafe to drive, or doing everyday tasks is difficult, then it's time to discuss surgery with your doctor.

8. Cataract A cataract is a clouding of the natural lens, the part of the eye responsible for focusing light and producing clear, sharp images. http://www.stlukes-eye.com/cataracts.htm

What is a cataract? W hen cataracts are mentioned, people often think of a film that grows on their eyes causing them to see double or blurred images. However, a cataract does not form on the eye, but rather within the eye. A cataract is a clouding of the natural lens.

9. Facts About Cataract have a cataract. In the early stages, stronger lighting and eyeglassesmay lessen vision problems caused by cataracts. At a certain http://www.nei.nih.gov/health/cataract/cataract_facts.htm

Health Funding News Laboratories ... Health Information Facts About Cataract CONTENT LIST What is the lens? What is a cataract? What are the symptoms? What are the different types of cataract? ... What can you do to protect your vision? Information for Patients A cataract is a clouding of the eye's lens that can cause vision problems. The most common type is related to aging. More than half of all Americans age 65 and older have a cataract. In the early stages, stronger lighting and eyeglasses may lessen vision problems caused by cataracts. At a certain point, however, surgery may be needed to improve vision. Today, cataract surgery is safe and very effective. What is the lens? The lens is the part of the eye that helps focus light on the retina. The retina is the eye's light-sensitive layer that sends visual signals to the brain. In a normal eye, light passes through the lens and gets focused on the retina. To help produce a sharp image, the lens must remain clear. What is a cataract? The lens is made mostly of water and protein. The protein is arranged to let light pass through and focus on the retina. Sometimes some of the protein clumps together. This can start to cloud small areas of the lens, blocking some light from reaching the retina and interfering with vision. This is a cataract.

10. Are You At Risk For Cataract? National Eye InstituteÕs publication for people who are at higher risk forcataracts. It is after age 60 that most cataracts steal vision. TOP. http://www.nei.nih.gov/health/cataract/cataract_risk.htm

Health Funding News Laboratories ... Health Information Are You At Risk for Cataract? CONTENT LIST What is a cataract? What causes it? When are you most likely to have a cataract? What are its symptoms? ... What can you do to protect your vision? What is a cataract? A cataract is a clouding of the eye's lens that causes loss of vision. This brochure is about age-related cataract, the most common type. What causes it? The lens lies behind the iris and the pupil (see diagram). It works much like a camera lens. It focuses light onto the retina at the back of the eye, where an image is recorded. The lens also adjusts the eye's focus, letting us see things clearly both up close and far away. The lens is made of mostly water and protein. The protein is arranged in a precise way that keeps the lens clear and lets light pass through it. But as we age, some of the protein may clump together and start to cloud a small area of the lens. This is a cataract. Over time, the cataract may grow larger and cloud more of the lens, making it harder to see. Researchers suspect that there are several causes of cataract, such as smoking and diabetes. Or, it may be that the protein in the lens just changes from the wear and tear it takes over the years.

11. Cataracts cataracts. cataracts are the each year. Removal of cataracts is themost common surgery for Americans over the age of 65. cataracts http://www.eyecare.org/consumer/disease/cat.html

Cataracts Cataracts are the leading cause of blindness worldwide and over 1.3 million cataract operations are successfully performed in the United States each year. Removal of cataracts is the most common surgery for Americans over the age of 65. Cataracts are a progressive clouding of the internal lens of the eye. The human lens is normally crystal clear and allows images to be focused properly on the retina. As the lens ages, this clouding prevents the image from focusing clearly onto the retina. Some degree of cataract formation is quite common in all patients over the age of 60. When cataract formation progresses and begins to impinge upon the patient's visual functioning, then treatment is indicated. Some examples of when a cataract is interfering with the vision might include difficulty with reading, excessive glare, difficulty driving, difficulty recognizing faces, problems with avocations or hobbies. Common Symptoms . Cataracts result in a slow progressive loss of visual acuity in one or both eyes. Cataracts commonly result in glare and frequent changes in the spectacle prescription required for best vision. Patients may also experience a loss of contrast and occasionally may experience double vision in one eye with cataracts. When cataracts progress and begin to limit the patient's ability to perform the activities of daily life, treatment should be considered. When cataracts interfere with a patient's functioning, common complaints include difficulty with ambulation, reading, excessive glare, night driving, problems recognizing faces, or difficulty performing avocations and or hobbies.

12. Cataracts In Small Animals cataracts and Cataract Surgery in Small Animals WHAT IS A CATARACT? The lens is a unique living ocular tissue that is usually clear or transparent and is referred to as 'the crystalline lens' by doctors. http://www.eyevet.org/cataract.html

French German Italian Portuguese Spanish Powered by SYSTRAN Cataracts and Cataract Surgery in Small Animals CATARACT WHAT IS A CATARACT? WHAT SHOULD YOU DO IF A CATARACT IS SUSPECTED? The first thing to do if your veterinarian indicates your pet has a cataract is to have your pet examined by a veterinary ophthalmologist. The lens is an important link of the total visual system, yet the health of the entire eye should be evaluated before the lens develops a complete cataract. Early evaluation of the eye with a cataract sometimes permits examination of the retina. If the cataract is complete and 'mature', the retina cannot be directly examined and an ultrasound or an electroretinogram examinations, or both may be needed to assess the health of the retina. At the time of the initial examination, the cataract may sometimes be identified as to cause, area of involvement and stage of progression. Not all cataracts lead to blindness. "Incomplete" cataracts may not impair vision significantly. If your pet has a cataract and has shown some visual loss, evaluation will include the consideration of and benefit of cataract surgery. HOW DO YOU KNOW IF YOUR PET HAS A VISION PROBLEM?

13. Cataracts In America Monthly emagazine for doctors and patients about the advances in surgery. Also find surgeon in your area.Category Health Conditions and Diseases Eye Disorders Cataract...... Bulletin Boards. Foreign Ophthalmic Organizations. Vocational RehabilitationAgencies. American Board of Eye Surgery. ABSTRACTS, cataracts Linked to Obesity? http://www.cataractsinamerica.com/

SEARCH: Find A Doctor VisionLossDocShop is a resource that allows patients to learn about VisionLoss, the technology behind procedures related to Visionloss, and find a VisionLoss specialist who has a website in their area. Click here to visit VisionLossDocshop. RESOURCES Organizations Physician Directories LASIK Illustrations LASIK Videos ... Foreign Ophthalmic Organizations ABSTRACTS Cataracts Linked to Obesity? A recent study showed a correlation between body mass index (BMI) and the incidence of cataracts, suggesting that obese individuals may run a higher risk of developing the vision ... Click for more>> Awareness of Cataracts Important ... Click for more>> Find a Doctor In Your Area! Choose a state or province below... Alabama Alaska Arizona Arkansas ... Puerto Rico Canadian Provinces Alberta British Columbia Manitoba New Brunswick ... Mexico International England / Wales Scotland Ireland / Northern Ireland Australia ... Other International Published the 1st Friday of Each Month PUBLICATIONS Find the latest news on the following topics from our other publications. Cosmetic Surgery In America Fertility In America Dentistry In America Hair Loss In America ... Vision Loss In America Are you interested being published online?

14. Cataract.htm age. These are not cataracts! At times the cataract appears to worsenovernight. cataracts may develop in one or in both eyes. If http://www.flash.net/~anmleyz/cataract.htm

CATARACT What is a cataract? The lens is a unique living ocular tissue that is usually clear or transparent and is referred to as 'the crystalline lens' in medical texts. The normal lens focuses light on the light-sensitive nervous tissue (retina) located in the back of the eye. The word cataract literally means "to break down." Doctors refer to any opacity (or cloudy change) of the lens that causes light to scatter as a cataract. Cataractous changes of the lens may appear as small insignificant pigmented, gray or white "dots"., microscopic "blisters", a "cracked glass" appearance, a diffuse haze, a "pearly" sheen, white streaks or a completely white lens. The cataract usually begins as small dots or microscopic blisters and progresses to involve larger areas of the lens. The rate of progression is difficult to predict and may be very slow or quite rapid. A cataract is different than the normal aging change that occurs in the lens which is called nuclear sclerosis.

15. THE MERCK MANUAL--Home Edition, Sec. 20, Ch. 223, Cataracts Section 20. Eye Disorders. Chapter 223. cataracts. click on thumbnail to seefullsize imagecataracts produce a progressive, painless loss of vision. http://www.merck.com/pubs/mmanual_home/sec20/223.htm

The Merck Manual of Medical InformationHome Edition Section 20. Eye Disorders Chapter 223 Cataracts A cataract is a cloudiness (opacity) in the eye's lens that impairs vision. Cataracts produce a progressive, painless loss of vision. Their cause usually isn't known, although they sometimes result from exposure to x-rays (such as high-dose radiotherapy to the eye) or strong sunlight, inflammatory eye diseases, certain drugs (such as corticosteroids), or complications of other diseases such as diabetes. They're more common in older people; babies can be born with cataracts (congenital cataracts). Symptoms Because all light entering the eye must pass through the lens, any part of the lens that blocks, distorts, or diffuses light can cause poor vision. How much vision deteriorates depends on where the cataract is and how dense (mature) it is. In bright light, the pupil constricts, narrowing the cone of light entering the eye, so that it can't easily pass around the cataract. Thus, bright lights are especially disturbing to many people with cataracts, who see halos around lights, glare, and scattering of light. Such problems are particularly troubling when a person moves from a dark to a brightly lit space or tries to read with a bright lamp. People with cataracts who also take glaucoma medication that constricts the pupils may have greater vision loss. A cataract at the back of the lens (posterior subcapsular cataract) particularly interferes with vision in bright light. It affects vision more than other cataracts because the opacity is at the point where light rays cross.

16. Cataracts - VisionChannel Symptoms, diagnosis, and treatment of this condition which causes a clouding of the eye and can cause Category Health Conditions and Diseases Eye Disorders Cataract...... light. If left untreated, cataracts may eventually cause blindness. treatment.One in every 10,000 babies is born with congenital cataracts. http://www.visionchannel.net/cataracts/

Home Search SiteMap Ask the Dr. ... Medical Store advertisement CATARACTS Overview Types Diagnosis Treatment CONDITIONS Amblyopia (lazy eye) Blepharitis Cataracts Color Vision Deficiency ... Refractive Errors Correction Retinal Detachment Retinitis Pigmentosa Retinopathy of Prematurity Skin Cancer of the Eyelids Tear Duct Obstruction INTERACT VisionForum Links Clinical Trials ABOUT US Healthcommunities.com Pressroom Bibliography Overview A cataract is the clouding or opacity that develops in the eye’s lens . The crystalline lens is comprised primarily of protein and water. Normally, the protein is bonded in a way that allows light to pass through it. A cataract forms when bonding changes and protein molecules clump together. Eventually, these clumps cloud the lens and block light. If left untreated, cataracts may eventually cause blindness. Incidence and Prevalence In the United States, about 50% of those between the ages 65 and 74, and 70% of those over age 75 have a cataract. Women are affected more frequently than men. African Americans lose their vision from both cataracts and glaucoma at twice the rate of Caucasian Americans, primarily due to lack of

17. Cataracts cataracts. We are frequently asked the following questions regardingcataracts in animals. The answers have. WHAT ARE cataracts? A http://eyedvm.com/cataracts.htm

Animal Ophthalmology Clinic, PC CATARACTS We are frequently asked the following questions regarding cataracts in animals. The answers are intended as general responses to increase your understanding. Please feel free to ask any additional questions you may have. WHAT ARE CATARACTS? A cataract is defined as any opacity (or opacities) of the lens of the eye (see Figure 1). Such opacities may be quite small and interfere little with vision, or they may involve the entire lens causing blindness. Cataracts occur because something interferes with the normal function of lens fibers causing them to degenerate. Causes include inflammatory diseases, hereditary factors, aging changes, toxicities, and metabolic diseases such as diabetes mellitus. DO ALL ANIMALS DEVELOP CATARACTS WITH AGE? In general, no! In fact most animals should live their entire lives without developing cataracts. The lens does become thicker with age and thus appears grayer causing many people to mistake this change for a cataract. This normal aging process is called nuclear or lenticular sclerosis and does not impair vision other than making focusing on close objects more difficult. However some animals do develop cataracts and certain breeds of animals are afflicted with hereditary cataracts so that a significant percentage of the population may develop cataracts. This is especially true in dogs. Miniature schnauzers, cocker spaniels, poodles, Labrador retrievers and golden retrievers are just a few of the breeds which may be affected.

18. Cataracts In Small Animals cataracts and Cataract Surgery in Small Animals. CATARACT. WHAT CAUSES cataracts?The cause of cataracts is an area continually being studied. http://www.eyevet.info/cataract.html

19. Postgraduate Medicine: Failing Vision Symposium: Cataracts cataracts. Preview About half of the general population between the ages of 65 and75 years has cataractsand that number increases another 20% after age 75. http://www.postgradmed.com/issues/1998/05_98/trudo.htm

Cataracts Lifting the clouds on an age-old problem Edward W. Trudo, MD; Walter J. Stark, MD VOL 103 / NO 5 / MAY 1998 / POSTGRADUATE MEDICINE This page is best viewed with a browser that supports tables This is the first of four articles on failing vision Preview : About half of the general population between the ages of 65 and 75 years has cataractsand that number increases another 20% after age 75. While they are the most common treatable cause of vision loss in older adults, cataracts sometimes are unrecognized or are considered just another normal consequence of growing older. In this article, Drs Trudo and Stark explain the causes, symptoms, and differential diagnosis of cataracts and discuss treatment options that can improve independence and quality of life for many patients. M ore than 3,000 years ago, cataract surgery was performed by using a technique called couching. An assistant held the patient's head steady while the surgeon inserted a needle into the eye and pushed the clouded lens out of the visual axis, allowing it to rest, or "couch," in the back of the eye (1,2). The operation resulted in a clearer but unfocused view of the world. Nonetheless, a few patients regained the ability to perform the daily tasks that the cataract had precluded. While surgical techniques and skills have improved dramatically since those early times, the surgeon's goal of improving vision and quality of life still holds true today.

20. Postgraduate Medicine: Patient Notes: Cataracts cataracts. VOL 99 / NO 4 / APRIL 1996 / POSTGRADUATE MEDICINE. What are cataracts?They are clouding of the lens of the eye caused by changes within the eye. http://www.postgradmed.com/issues/1996/pat_note/cataract.htm

Patient Notes Cataracts VOL 99 / NO 4 / APRIL 1996 / POSTGRADUATE MEDICINE One result of the natural aging process is cataracts. By age 65, nearly everyone has the problem to some degree. Cataracts are painless, progress very slowly, and are visible only after they become advanced. What are cataracts? They are clouding of the lens of the eye caused by changes within the eye. They are not a film over the eye. With age, the lens becomes dense and firm. The proteins in the lens change, causing the white appearance that is noticeable when cataracts have progressed for some time. Cataracts may be on the edges of the lens for years without causing problems, but when they occur on or progress to the front of the lens, in line with your pupil, they cause the vision problems they are known for. What are the symptoms of cataracts? Like a camera lens, your eye's lens uses the light passing through it to focus on objects and produce clear images. When the lens becomes clouded by cataracts, vision becomes blurred. Also, night vision is poor and colors often appear dull or distorted. Many people become sensitive to bright light, especially reflected light, such as off water or snow. Almost always, one eye is affected more severely than the other. You may have double vision in the affected eye. You won't go completely blind from cataracts, because some light always gets through. But vision gets more and more blurry as cataracts progress. Do I need surgery?

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