At What Age Do Cataracts Develop?

Most patients become aware of cataracts after the age of 60. However, cataracts begin developing much earlier than that in the form of Dysfunctional Lens Syndrome (DLS), a term now widely used to describe the natural ageing changes of the eye’s lens. Your natural lens goes through a gradual ageing process, which can begin to affect vision from around the age of 40.

There is currently no medical cure for DLS or cataracts, as these changes are part of the normal ageing process of the eye. Over time, DLS can progress into visually significant cataracts, which may lead to severe vision impairment if left untreated. Surgical intervention remains the only definitive treatment once cataracts interfere with daily life.

If you notice any signs or symptoms of DLS or cataracts, it is important to consult an ophthalmologist in NSW or Canberra to confirm a diagnosis and discuss appropriate treatment options.

How Long Do Cataracts Take to Develop?

As mentioned earlier, cataracts develop slowly over many years, often decades. In most cases, the process begins subtly in the 40s as part of DLS, progresses through gradual lens changes in the 50s, and only becomes visually significant in the 60s or later.

For many people, early lens changes cause mild symptoms that are easily managed with glasses or lighting adjustments. Cataracts usually reach the point of requiring surgery only when vision starts to interfere with everyday activities such as driving, reading, or recognising faces.

However, the rate of progression can vary. Factors such as genetics, diabetes, smoking, prolonged UV exposure, eye injury, or long-term steroid use may accelerate cataract development. Regular eye examinations allow changes to be monitored over time and help determine the right moment for intervention.

Below, we outline the stages of cataract development to help you understand what may be happening if you are experiencing changes in your vision.

Stage 1: Early DLS

Patients in their 40s commonly begin to experience early DLS as the natural lens becomes less flexible and gradually loses clarity at a microscopic level. The most noticeable effect is difficulty focusing on near objects.

At this stage, the lens usually still appears clear on examination and does not yet show visible clouding. However, it has become stiffer, reducing its ability to change shape and focus up close. This condition is known as presbyopia, a universal age-related change that affects everyone over time.

Treatment Options for Stage 1

Many patients may not immediately seek assessment, particularly if they already wear glasses or contact lenses for short-sightedness, long-sightedness, or astigmatism. However, recognising early changes in vision remains important, as multiple refractive issues can coexist.

For suitable candidates, refractive procedures such as LASIK monovision or KAMRA presbyopic corneal inlay may help improve near vision and reduce dependence on reading glasses during this stage.

Stage 2: Advanced DLS

As DLS progresses, typically in a person’s 50s or early 60s, the natural lens may begin to yellow and develop early clouding. Patients often notice blurrier vision, reduced contrast, and increasing glare, particularly at night. Night driving may become uncomfortable or unsafe, which should never be ignored.

Another common sign of Stage 2 DLS is frequent prescription changes, as the optical properties of the lens continue to shift. Many patients also find they need brighter lighting to read or perform detailed tasks.

Treatment Options for Stage 2

At this stage, patients may elect to permanently correct their vision by replacing the ageing natural lens with an artificial intraocular lens. This approach addresses visual symptoms and prevents progression to advanced cataracts.

Stage 3: Cataracts

Around half of Australians aged 65 to 74 are affected by cataracts. As DLS advances beyond the age of 60, the lens becomes increasingly cloudy and scatters light as it enters the eye. Once this clouding significantly interferes with vision, it is classified as a cataract.

Cataracts can present in different forms and may cause symptoms such as blurred or distorted vision, double vision, progressive vision loss, increased glare, faded colours, or a white or milky appearance in the pupil.

Treatment Options for Stage 3

Early treatment improves visual outcomes and reduces the risk of complications. If left untreated, cataracts can contribute to secondary conditions such as glaucoma and may eventually lead to blindness.

The most effective treatment is cataract surgery, which involves removing the cloudy natural lens and replacing it with an artificial intraocular lens. This procedure is highly successful, commonly performed, and typically involves a short recovery period.

Start Your Cataract Assessment

To learn more about your cataract treatment options or to discuss your symptoms with an experienced ophthalmologist, contact personalEYES today to book a free consultation.