{"id":1877,"date":"2022-01-06T02:30:43","date_gmt":"2022-01-06T02:30:43","guid":{"rendered":"https:\/\/eceye.com.hk\/?page_id=1877"},"modified":"2024-10-09T13:22:57","modified_gmt":"2024-10-09T05:22:57","slug":"cataract-centre","status":"publish","type":"page","link":"https:\/\/eceye.com.hk\/en\/cataract-centre\/","title":{"rendered":"examination before cataract surgery"},"content":{"rendered":"
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"examination\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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examination before cataract surgery<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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examination before cataract surgery<\/span>is the leading cause of blindness worldwide. The World Health Organization (WHO) reports that an estimated 19.34 million people globally are blind due to age-related cataracts, accounting for 43% of all cases of blindness.1<\/sup>As the population grows and life expectancy increases, the number of blind people in the world and the rate of cataract blindness will continue to increase. Common symptoms of cataracts include blurred vision, glare, and dim colors of scenery. The causes of cataracts include aging of the lens, eye diseases, etc. The current preferred treatment method is minimally invasive ultrasonic cataract surgery followed by implantation of an intraocular lens (monofocal lens or multifocal lens). Generally, hospitalization is not required and there will be no recurrence after surgery.<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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1<\/sup>Source: World Health Organization<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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What is Cataract?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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A cataract is a change in the protein of the lens in the eye that gradually degrades, hardens, and becomes opaque, so that vision is blurred as if covered by a foggy lens. The disease is likely to occur in one or both eyes, which, however, do not spread or infect each other. The condition varies depending on the location and degree of clouding of the lens. Vision loss also varies from person to person and can be severe enough to cause blindness.<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Normal\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Symptoms of Cataract<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Early-stage cataracts do not show any obvious symptoms, but as the condition becomes more severe the following symptoms may occur:<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Blurred vision<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Cataracts\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Glare appears<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Landscape\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Landscape colours
\nbecome dull<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Double or multiple
\nvision in one eye<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Refractive errors get worse
\n(myopia, astigmatism)<\/span><\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Causes of Cataract<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Lens\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Aging of the lens
\nwith aging<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"External\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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External Trauma<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Excessive\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Excessive ultraviolet- \/
\ninfrared-light exposure<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Metabolic\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Metabolic diseases
\n (e.g. diabetes)<\/span><\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"High\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Drug-induced
\n(e.g. prolonged use of steroids)<\/span><\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Other eye illnesses
\n(e.g. high myopia)<\/span><\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Congenital\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Congenital or genetic factors<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Phacoemulsification
Cataract removal surgery<\/span><\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Cataract\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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There are currently no medications that can effectively prevent or treat cataracts, and cataract surgery is the only method recognized as effective in treating cataracts.\n

\nMinimally invasive ultrasound cataract removal surgery is the treatment of choice today. The surgery only requires local anesthesia. The main surgical method is to use ultrasonic waves to emulsify the cataract into fragments, suck out the small pieces and then implant the artificial lens. After surgery, the posterior capsule of the eye becomes clear, allowing light to focus on the retina again, while restoring vision and reducing refractive errors. The operation time is short, the patient can leave the same day and the recovery time is quick.<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Local anaesthesia<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Go\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Go home on the same day
\nof the surgery <\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"The\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Surgery can be
\nas short as 10-20 minutes<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Minimally\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Minimally invasive
\nsurgery has small wounds<\/span><\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Cataract\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Reduce refractive errors
\n(myopia, hyperopia, presbyopia and astigmatism) <\/span><\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Low\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Low risk of wound
\ninfection and complications<\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Local anaesthesia<\/p>\r\n <\/div>\r\n

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Go home on the same of the surgery<\/p>\r\n <\/div>\r\n

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Surgery takes only 10-20 minutes<\/p>\r\n <\/div>\r\n

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Minimally invasive<\/p>\r\n <\/div>\r\n

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Reduce refractive errors (myopia, hyperopia, presbyopia, astigmatism)<\/p>\r\n <\/div>\r\n

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Low risk of wound infection and complications<\/p>\r\n <\/div>\r\n<\/div>\r\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Procedure of ultrasound cataract surgery<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"Minimally\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Types of Intraocular Lens (IOL):<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n
<\/td>\r\n Monofocal Lens<\/td>\r\n Multifocal Lens (Trifocal)<\/td>\r\n Multifocal Lens (EDOF)<\/td>\r\n <\/tr>\r\n
\r\n \"Features\"\r\n Features\r\n <\/td>\r\n Good vision at one distance<\/td>\r\n Good vision at multiple distances<\/td>\r\n Good vision at multiple distances + Extended depth of field<\/td>\r\n <\/tr>\r\n
\r\n \"Field\r\n Field of view\r\n <\/td>\r\n Excellent, delivers good vision at far, medium or near distances<\/td>\r\n Excellent, delivers good vision at far, medium or near distances<\/td>\r\n Excellent, delivers good vision at far, medium and near distances; continuous vision at a range of distances; less halos and glare<\/td>\r\n <\/tr>\r\n
\r\n \"Astigmatism\"\r\n Astigmatism\r\n <\/td>\r\n Optional<\/td>\r\n Optional<\/td>\r\n Optional<\/td>\r\n <\/tr>\r\n
\r\n \"Limitations\"\r\n Limitations\r\n <\/td>\r\n Inability to focus on near and far vision at the same time<\/td>\r\n Inappropriate for people with high vision requirements at night, such as night-shift drivers<\/td>\r\n Absence of trifocal features for near distance<\/td>\r\n <\/tr>\r\n
\r\n \"Suitability\"\r\n Suitability\r\n <\/td>\r\n \r\n
    \r\n
  • With financial considerations<\/li>\r\n
  • Suitable for majority of the people<\/li>\r\n
  • Do not mind wearing glasses<\/li>\r\n <\/ul>\r\n <\/td>\r\n
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    \r\n
  • Financially affordable<\/li>\r\n
  • No frequent driving at night<\/li>\r\n <\/ul>\r\n <\/td>\r\n
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