Cataracts

A clouding of the naturally clear lens within the eye.

What are cataracts?

Cataracts are a very common condition where the natural crystalline lens of the eye becomes cloudy over time. This cloudiness prevents light from properly reaching the retina, causing decreased vision. It is the main cause of vision impairment and vision loss around the world.

Symptoms

Cataracts develop over time and often occur in both eyes, though each eye may be affected differently.

Symptoms of cataracts may include:

  • Blurry or foggy vision

  • Double vision

  • Trouble seeing in low or very bright lighting

  • Bright light sources may be dazzling or uncomfortable to look at

  • Colours appear faded with a yellow or brownish tinge

Common causes

Cataracts usually develop as you age, but there are also other factors that can increase the risk of developing cataracts, including:

  • Smoking

  • Diabetes

  • Heavy alcohol consumption

  • Exposure to UV rays, especially without protective eyewear like sunglasses

  • Using certain types of medication over a certain period of time

  • Previous eye injury or surgery

Treatment

If you have a mild form of cataracts, wearing glasses with different strengths or brighter reading lights may help with blurred vision. However, most cataracts do worsen over time, which will require treatment.  

Treatment for cataracts includes surgery, where your natural lens is removed and replaced with an artificial lens called an intraocular lens (IOL) by an ophthalmologist (eye surgeon). If your optometrist detects cataracts during an eye exam, they will refer you to an ophthalmologist to further assess the cataracts and decide on a treatment plan. 

Cataracts are just one of the eye conditions that can be detected during a comprehensive eye exam, which is why they’re so important.

Cataracts surgery

What does cataract surgery involve?

An ophthalmologist will determine if you’re a good candidate for cataract surgery. Most cataract operations are performed using a local anesthetic. This means that you’ll be awake and may sense touch or cool fluid on your eye, but you shouldn’t feel any pain.   

During the procedure you may see some lights and shadows while the ophthalmologist is working. They will make a tiny incision to remove the cataract and will normally replace it with an acrylic lens so that you can see clearly after the eye has fully healed. The surgery typically takes around 15‑20 minutes and won’t usually require sutures. After the surgery, you’ll need someone to drive you home as you won’t be able to drive until you’ve been cleared by your surgeon during your post‑operative appointment.

What are the risks of cataract surgery?

Cataract surgery is generally a very successful procedure, and the majority of patients are happy with the results. 

But as with all surgery, there are risks involved and you shouldn’t have the operation unless you feel it is right for you.   

Your ophthalmologist will walk you through all the benefits and risks for your case and also provide you with a management plan after surgery to make sure your eyes heal properly.

Next steps

We want to help you see clearly and keep your eyes healthy for as long as possible. If your optometrist detects any signs of an eye condition during your comprehensive eye exam, they will determine an appropriate management plan that suits your needs.

Book an eye exam

Get answers to your questions

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Reviewed by Dr. Bosung Kim

Dr. Bosung Kim is a Doctor of Optometry in Canada and is the optometrist partner at Specsavers Hastings‑Sunrise. Dr. Kim is a prominent leader in his community and is passionate about serving others and improving the lives of the public through better sight. 

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