D l Cataract Iinformation
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A cataract is a clouding of the lens in the eye that leads to a decrease in vision. It develops when the protein in the lens clumps together, blocking light from reaching the retina. The four main types are age-related, congenital, secondary, and traumatic. Symptoms include blurry or foggy vision, sensitivity to light, and frequent changes in prescription glasses. Treatment options range from eyeglasses to surgical removal of the clouded lens and replacement with an artificial lens. Cataract surgery is highly effective but does carry risks of complications.
D l Cataract Iinformation
- 1. Cataract Normal Eye Cataracts
- 2. What is a Cataract? An ocular opacity, partial or complete, of one or both eyes, on or in the lens or capsule, especially an opacity impairing vision or causing blindness. The subsequent cloudy appearance of the eye resulted in the origin of the name cataract
- 3. The lens is made mostly of water and protein. The protein is normally arranged to let light pass through and focus on the retina. Protein clumps together Small areas of lens begin to cloud Light is blocked from reaching the retina and vision is impaired Cataract Development An advanced stage cataract would be something like putting sheets of wax paper over your glasses You would be able to see light and dark and maybe distinguish large objects and see movement.
- 4. Cataract Formation 1. Early Stages – change prescription 2. Late Stages – surgical removal It is 90% effective for age-related cataracts For secondary, traumatic and congenital cataracts surgery is not always an option Once a cataract begins to develop there is nothing that can be done to prevent its growth.
- 5. Types of Cataracts There are four different types of cataracts 1. Age-related cataract: Most cataracts are related to aging 2. Congenital cataracts: Some babies are born with cataracts or develop them in childhood , often in both eyes. These can lead to blindness or may not affect vision at all 3. Secondary cataract: Development in people who have certain other health issues, such as diabetes or things such as steroid use 4. Traumatic cataract: cataracts which develop after an eye injury
- 6. What causes a Cataract? This is a somewhat complicated subject Aging of the lens is caused by oxidation (the formation of free radicals) b) Free Radicals : A molecule which has lost an electron and will do anything to get it back They attack the protein of the lens, steal a hydrogen and cause oxidative damage. This leads to a snowball effect The protein then clumps together and the lens begins to cloud, blocking some light from reaching the retina and clouding vision Speed of oxidation is increased by: 1. Smoking /Alcohol use 2. Diabetes 3. Excessive exposure to ultraviolet sunlight
- 7. What does a mid-stage cataract look like? The type of cataract you have will
- 8. What does a late-stage cataract look like?
- 9. How an early stage cataract effects vision
- 10. Symptoms Cloudy, fuzzy, foggy or filmy vision Changes in the way you see colors Problems driving at night because headlights seem too bright Problems with glare from lamps or the sun Frequent changes in your eyeglass prescription Double vision Better near vision in those who are farsighted As the lens becomes cloudier the optics of the eye change this may actually allow people who once needed glasses to be able to read without them
- 11. Eye examination Visual acuity test : This eye chart test measures how well you see at various distances Pupil dilation : the pupil is widened with eye drops to allow your eye doctor to see more of the lens and retina and look for other eye problems Tonometry : This is a standard test to measure fluid pressure inside the eye Cataract Detection
- 12. How are cataracts treated? For early cataracts Vision may be improved by: Using different eyeglasses Magnifying lenses Stronger lighting If these measures do not improve quality of life, surgery is the only option Involves the removal of the cloudy lens and replacing it with a substitute lens A cataract needs to be removed only when vision loss interferes with everyday activities such as driving, reading or watching TV
- 13. How is a cataract removed? Phacoemulsification : The most common method of removal. Phaco involves a small incision on the side of the cornea. A tiny probe is inserted which emits ultrasound waves that soften and break up the cloudy center of the lens so it can be removed with suction
- 14. Intraocular Lens After the lens is removed a clear, artificial lens called an Intraocular lens (IOL) is required. The IOL becomes a permanent part of the eye and must last the rest of the patients life
- 15. Benefits of Cataract Surgery Improvements in activities Driving Watching TV Reading Working Moving around Social activities Hobbies Safety Self-confidence Independence
- 16. BUT….
- 17. Risks of Cataract Surgery Possible complications: High pressure in the eye Blood collection inside the eye Infection inside the eye Artificial lens damage Drooping eyelids Retinal detachment Severe bleeding inside the eye Swelling or clouding of the cornea Blindness LOSS OF EYE
- 18. Epidemiology of Cataracts According to the World Health Organization cataracts are the number one cause of blindness worldwide 50 million persons in the world are BLIND from cataracts More then half of people over 65 have cataracts 60% of people over the age of 75 have cataracts If you live long enough you are virtually GUARANTEED to develop a cataract
- 19. Primary Prevention Intake of dietary antioxidants prevent cataract formation by blocking the oxidative modification of the lens Vitamins A, C and E People who had regular daily doses of the antioxidants Vitamin C and E were 32% less likely to have developed cataracts
- 20. VITAMIN A
- 21. VITAMIN C
- 22. VITAMIN E
- 23. What can I do to protect my vision? Wearing sunglasses and a hat with a brim to block ultraviolet sunlight may help to delay cataract. If you smoke, stop . Researchers also believe good nutrition can help reduce the risk of age-related cataract. They recommend eat ing green leafy vegetables, fruit, and other foods with antioxidants
- 24. If you are age 60 or older, you should have a comprehensive dilated eye exam at least once every two years. In addition to cataract, your eye care professional can check for signs of age-related macular degeneration, glaucoma, and other vision disorders. Early treatment for many eye diseases may save your sight. What can I do to protect my vision? Cont…