Keratoconus and Eye Testing: What You Need to Know

Keratoconus is a progressive condition that affects the cornea, the clear front surface of the eye.

In healthy eyes, the cornea has a smooth, dome-like shape that helps focus light clearly. In keratoconus, the cornea gradually thins and bulges forward into a cone-like shape. This irregular surface bends light unevenly, leading to distorted or blurred vision.

For people living with keratoconus, everyday tasks such as reading, driving at night, or working on a computer can become increasingly difficult. Symptoms may start with mild blurriness or sensitivity to light, but as the condition progresses, vision can become more unstable. Frequent changes in glasses prescriptions, double vision, or halos around lights are all common experiences.

Because keratoconus can worsen over time, early diagnosis is very important. Detecting changes early makes it possible to monitor the condition closely and discuss treatment options before vision is significantly affected.

Why Early Detection Of Keratoconus Is Important

One of the challenges with keratoconus is that it can be mistaken for other eye conditions in the early stages. Without the right tests, it may go undiagnosed until vision is noticeably impaired. When detected late, options for management are more limited, and advanced stages may require more complex treatments.

By identifying keratoconus early, optometrists can:

• Track the progression of the condition over time.
• Recommend treatments that may slow or stabilise its development.
• Help maintain clearer vision for as long as possible.

This makes regular, comprehensive eye examinations an essential part of long-term eye care, especially for people at higher risk.

What Happens During a Comprehensive Eye Exam?

At Optometrist Parramatta, our comprehensive eye exams include a combination of tests to assess the shape, strength, and health of your cornea.

The tests involved will depend on your individual eye health and requirements, but may include:

• Corneal topography – A non-invasive scan that maps the surface of your cornea in detail. This test can reveal subtle irregularities in shape, often before vision problems become obvious.
• Corneal thickness measurement – Because thinning is a hallmark of keratoconus, measuring the thickness of the cornea helps in diagnosis and monitoring.
• Slit-lamp examination – Using a microscope and bright light, this test allows close examination of the front of the eye, including the cornea, to check for scarring or other changes.

These tests provide a detailed picture of how healthy your cornea is and whether keratoconus may be present.

Who Is at Risk Of Keratoconus?

Keratoconus can affect anyone, but certain factors increase the likelihood of developing it. These include:

• Family history – Having a close relative with keratoconus increases your risk.
• Frequent changes in prescription – Regularly needing stronger glasses may be a sign of irregular corneal changes.
• Eye rubbing – Vigorous or chronic eye rubbing has been linked to the progression of keratoconus.
• Age – The condition often appears during adolescence or early adulthood, though it can develop later in life.

If you fall into one of these categories, regular eye exams and corneal imaging are especially important.

What Happens If I Have Keratoconus?

Hearing that you may have keratoconus can be daunting, but our optometrists will explain your test results so you understand what is the condition and what management options are available, based on your individual eye health and circumstances.

It is important to schedule regular follow-up scans, as recommended by your optometrist, to allow comparisons over time. This will help assess whether the condition is stable or progressing.

What Treatment Options Are There For Keratoconus?

There is no single approach to keratoconus. Treatment depends on the stage of the condition and how much it is affecting your vision.

Options may include:

• Glasses – In early stages, standard prescription glasses may still provide adequate vision correction.
• Contact lenses – Specialised lenses such as rigid gas permeable (RGP), hybrid, or scleral lenses can provide a smoother surface for light to pass through, improving clarity.
• Corneal cross-linking – A medical procedure that strengthens corneal tissue to help slow or stop progression of keratoconus. This is most effective when performed in earlier stages.
• Corneal graft or transplant – In advanced cases with significant thinning or scarring, surgery to replace part or all of the cornea may be considered.

Which option is most suitable will depend on your test results, how advanced the condition is, and your individual needs.

Living With Keratoconus

Although keratoconus can be challenging, many people continue to live full, active lives with the right management. Regular monitoring ensures any changes are caught early, and advances in contact lenses and treatments mean more options are available than ever before.

The key is to maintain consistent eye examinations and follow your optometrist’s advice about testing and treatment.

If you have a family history of keratoconus, notice frequent changes in your glasses prescription, or are concerned about your vision, it may be time to book a comprehensive eye test.

By identifying keratoconus early and monitoring it carefully, you give yourself the best chance of maintaining good vision and protecting your eye health into the future.

To find out more, book an appointment with Optometrist Parramatta today.