{"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":"2025-06-09T13:25:28","modified_gmt":"2025-06-09T05:25:28","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>With population growth and increased life expectancy, the number of blind individuals and the rate of cataract\u2011related blindness are expected to continue rising worldwide. Common symptoms of cataracts include blurred vision, glare, and dimming of colors. Causes of cataracts include aging of the lens and other eye diseases. At present, the preferred treatment is minimally invasive phacoemulsification surgery to remove the cataract, followed by implantation of an intraocular lens (either monofocal or multifocal). Hospitalization is generally not required, and recurrence does not occur 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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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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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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Currently, there is no medication that can effectively prevent or treat cataracts. Cataract surgery is the only recognized effective method of management.\n

\nMinimally invasive phacoemulsification cataract surgery is currently the preferred treatment method. The procedure requires only local anesthesia. The main surgical technique involves using ultrasound to break the cataract into small fragments, which are then removed before implanting an artificial intraocular lens. After surgery, the posterior capsule of the eye becomes clear again, allowing light to refocus on the retina, thereby restoring vision and reducing refractive errors. The surgery is short in duration, patients can usually go home the same day, and recovery is fast.<\/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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\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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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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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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