EC Healthcare (Stock Code: 2138)

Cataract 
Symptoms of Cataract

Cataract 

Cataract are 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 As the population grows and lives longer, the number of blind people and the rate of cataract blindness in the world will continue to rise. Common cataract symptoms include blurred vision, glare, landscape colours becoming dull, etc. Minimally invasive phacoemulsification is the most common type of cataract surgery. It requires the implantation of IOL (monofocal lens or multifocal lens) without hospitalisation and replacement after the surgery.

1Source: World Health Organization

What is Cataract?

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.

Normal eye ball vs cataract

Symptoms of Cataract

Early-stage cataracts do not show any obvious symptoms, but as the condition becomes more severe the following symptoms may occur:

白內障症狀之一視力模糊

Blurred vision

白內障導致出現眩光症狀

Glare appears

景物顏色變 得暗淡

Landscape colours
become dull

導致出現單眼重影或多影

Double or multiple
vision in one eye

導致近視/散光度數加深

Refractive errors get worse
(myopia, astigmatism)

Causes of Cataract

白內障成因之一晶體老化

Ageing of the lens
with ageing

外來創傷可致白內障

External Trauma

紫/紅外光 過量接觸

Excessive ultraviolet- /
infrared-light exposure

新陳代謝疾病 例如糖尿病, 藥物 (如長期服用類固醇) 引起,

Metabolic diseases
(e.g. diabetes)

深度近視可 致白內障

Drug-induced
(e.g. prolonged use of steroids)

Other eye illnesses
(e.g. high myopia)

先天性或遺傳原因導致白內障

Congenital or genetic factors

Phacoemulsification
白內障切除手術

白內障超聲波手術

As there are no medications that can restore clear eyesight from cloudy vision resulting from cataract, surgery is the only recognised effective treatment.

Phacoemulsification, or phaco, is the most common type of cataract surgery. It requires only local anaesthesia. The main surgical procedure is the use of ultrasound to emulsify the cloudy lens into fragments which will be aspirated from the eye. Finally, an intraocular lens will be implanted. After the surgery, when all opacified materials have been removed, light can be refocused on the retina. Vision can be restored and refractive errors corrected at the same time. The operation is not long and can be done in a day surgery centre so patient can go home directly afterwards.

白內障手術時會局部麻醉

Local anaesthesia

Go home on the same day of the surgery

Go home on the same day
of the surgery

手術只需要10- 20分鐘

Surgery can be
as short as 10-20 minutes

微創超聲波手術傷口小

Minimally invasive
傷口小

白內障手術減少屈光不正

Refractive error can be corrected with use of different type of intraocular lens
(myopia, hyperopia, presbyopia and astigmatism)

手術傷口感染及併發症風險低

Low risk of wound
infection and complications

Local anaesthesia

Go home on the same day of the surgery

Surgery takes only 10-20 minutes

Minimally invasive

Refractive errors corrected (myopia, hyperopia, presbyopia and astigmatism)

Low risk of wound infection and complications

Steps of Phacoemulsification

Minimally Invasive Phacoemulsification

Types of Intraocular Lens (IOL):

Monofocal Lens Multifocal Lens (Trifocal) Multifocal Lens (EDOF)
Features Features Good vision at one distance Good vision at multiple distances Good vision at multiple distances + Extended depth of field
Field of view Field of view Excellent, delivers good vision at far, medium or near distances Excellent, delivers good vision at far, medium or near distances Excellent, delivers good vision at far, medium and near distances; continuous vision at a range of distances; less halos and glare
Astigmatism Astigmatism Optional Optional Optional
Limitations Limitations Inability to focus on near and far vision at the same time Inappropriate for people with high vision requirements at night, such as night-shift drivers Absence of trifocal features for near distance
Suitability Suitability
  • With financial considerations
  • Suitable for majority of the people
  • Do not mind wearing glasses
  • Financially affordable
  • No frequent driving at night
  • Financially affordable
  • Suitable for majority of the people
Preparing for Cataract Surgery

Preparing for Cataract Surgery

Preparing for Cataract Surgery

  • Comprehensive eye examination, including vision exam, corneal exam, etc.
  • Choose the right IOL according to your doctor's recommendation
  • Please follow your doctor's advice when prescribing medication for pre-operative use if necessary
  • Please inform your doctor in advance if you are taking medication for a long period of time
  • It is advisable to arrange for family or friends to pick up after the surgery
  • You can eat and drink as usual before the operation

Postoperative Care

Postoperative Care

Postoperative Care

  • Follow your doctor's instructions on the use of medication to prevent infection and reduce inflammatory response
  • For 1 to 2 weeks after surgery:
    • Do not rub or scratch your eyes at any time
    • Do not bend over to wash your hair or shower to prevent splashing water into your eyes
    • Avoid strenuous exercise, running and jumping to prevent increased intraocular pressure which may affect wound healing
  • During the first week of recovery, it is recommended to wear an eye shield when sleeping to prevent unintentional contact with the wound
  • Follow up on your doctor's advice to ensure you are well after surgery

Cataract Surgeries Programme
(白內障手術資助計劃)

Our ophthalmologists are among the designated doctors for the Hospital Authority's Cataract Surgeries Programme.
Eligible persons are welcome to receive cataract treatment at our Centre.

Details of the Programme can be found here.

白內障手術資助計劃 耀眼行動

Cataract FAQ

Patients should consider earlier cataract surgery as it is more difficult to be removed and the risk of complications will be higher if a cataract is more mature.
白內障手術建議不需要等到成熟才做Over clouding of the lens or over hardening of the nucleus will affect the surgeon's judgment and make the operation more difficult
Cataract FAQThe larger the lens, the larger the incision during removal and the longer the recovery time
延誤治療有機會引起青光眼等併發症Delayed treatment may lead to complications such as glaucoma and inflammation

It can reduce refractive errors (myopia, hyperopia, presbyopia, astigmatism).

No, because once implanted, IOLs can be used for life without replacement unless they fail to adapt or meet daily needs.

No. Cataract surgery is a minimally invasive procedure. Although the patient is awake for the treatment, most patients do not feel pain and can go home the same day.

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