Keratoconus Diagnosis & Treatment in Sydney
What is Keratoconus?
Keratoconus is a progressive eye condition that affects the cornea, the clear front surface of the eye responsible for focusing light.
In a healthy eye, the cornea has a smooth, round shape. In keratoconus, the cornea gradually becomes thinner and weaker, causing it to bulge outward into a cone-like shape.
This irregular shape prevents light from focusing correctly on the retina, leading to distorted and blurred vision.
Keratoconus can cause:
- Blurred or distorted vision
- Increased astigmatism
- Progressive short-sightedness (myopia)
- Double vision or ghosting
- Increased glare and halos
- Sensitivity to light
- Frequent prescription changes
Without early diagnosis and treatment, keratoconus can continue to progress and significantly affect vision and quality of life.
Who Develops Keratoconus?
Keratoconus usually develops during the teenage years or early adulthood, most commonly between 16 and 30 years of age.
The condition often progresses over several years before stabilising later in life.
Because keratoconus often begins early, it can impact:
- Academic performance
- Driving and daily tasks
- Workplace productivity
- Social confidence
- Overall quality of life
Early detection is essential for preserving vision and reducing long-term complications.
What Causes Keratoconus?
The exact cause of keratoconus remains unknown, however research suggests it is influenced by a combination of genetic and environmental factors.
Genetic Factors
Keratoconus may run in families, suggesting a hereditary component, although many patients have no known family history.
Eye Rubbing
Frequent or vigorous eye rubbing — particularly knuckle rubbing — can weaken corneal fibres and may increase the risk of progression.
Allergies and Eye Irritation
Keratoconus is often associated with conditions that cause itchy eyes, including:
- Hay fever
- Allergic eye disease
- Asthma
- Eczema
Managing allergies and avoiding eye rubbing are important steps in slowing progression.
Signs and Symptoms of Keratoconus
Common symptoms include:
- Blurred or distorted vision
- Increasing astigmatism
- Frequent prescription changes
- Sensitivity to bright light
- Glare and halos at night
- Difficulty seeing clearly with glasses
- Ghosting or double vision in one eye
- Eye strain and headaches
If you notice these symptoms, a comprehensive keratoconus assessment is strongly recommended.
How is Keratoconus Diagnosed?
Keratoconus is diagnosed through a comprehensive eye examination.
During your assessment, your optometrist may identify:
- Reduced visual clarity
- Irregular astigmatism
- Changes in corneal shape
- Progressive prescription shifts
Advanced imaging technology is used for accurate diagnosis, including:
Corneal Topography
Corneal topography creates a detailed map of the cornea’s shape and curvature, allowing early detection of subtle irregularities.
Pachymetry
Pachymetry measures corneal thickness to identify thinning associated with keratoconus.
These tests allow us to detect keratoconus early — often before symptoms become severe.
Keratoconus Treatment by an Optometrist
Early-stage keratoconus can often be managed successfully with non-surgical treatment.
Spectacles & Soft Contact Lenses
Mild keratoconus may initially be corrected with glasses or soft contact lenses.
As the condition progresses, these may become less effective.
Rigid Gas Permeable (RGP) Contact Lenses
For moderate keratoconus, specially designed Rigid Gas Permeable (RGP) contact lenses provide clearer vision by creating a smooth optical surface over the irregular cornea.
Benefits include:
- Sharper vision
- Improved corneal optics
- Custom fitting for comfort and stability
Allergy Management & Eye Rubbing Prevention
Reducing eye rubbing is essential to slow progression.
Treatment may include:
- Anti-histamine eye drops
- Dry eye treatment
- Allergy management strategies
- Patient education on avoiding mechanical eye trauma
Ongoing Keratoconus Monitoring
Regular monitoring is critical to detect progression early.
Corneal scans allow us to track structural changes and determine if referral for specialist treatment is required.
Specialist Ophthalmology Treatments for Keratoconus
If keratoconus shows progression, referral to an ophthalmologist may be necessary.
Corneal Collagen Cross-Linking (CXL)
Corneal Cross-Linking is currently the only proven treatment that can slow or halt progressive keratoconus.
The procedure involves:
- Applying Riboflavin (Vitamin B2) drops to the cornea
- Activating the solution with controlled ultraviolet (UV) light
- Strengthening collagen fibres within the cornea
This increases corneal rigidity and helps stabilise the condition.
Benefits of Cross-Linking
- Slows or stops progression
- Strengthens the cornea
- Reduces risk of severe vision loss
- May produce mild corneal flattening
It is important to understand that cross-linking does not reverse existing vision loss or cure keratoconus, but it can preserve vision long-term.
Most patients are monitored for 3–6 months before treatment to confirm progression.
Intracorneal Ring Segments (Kerarings / Intacs)
Intracorneal Ring Segments (ICRS) are small plastic implants inserted into the cornea to flatten its cone-like shape and improve vision.
Common types include:
- Intacs
- Kerarings
- Ferrara Rings
These rings:
- Improve corneal shape
- Improve visual quality
- Can reduce dependence on glasses or contact lenses
They do not stop keratoconus progression, which is why they are often combined with cross-linking.
ICRS are best suited for:
- Early to moderate keratoconus
- Contact lens intolerance
- Patients unsuitable for other correction options
If necessary, rings can be removed or adjusted by the ophthalmologist.
Why Early Keratoconus Detection Matters
Early diagnosis allows treatment before significant vision loss occurs.
Prompt management can:
- Slow progression
- Preserve corneal health
- Reduce need for surgery
- Improve long-term visual outcomes
Book a Keratoconus Assessment in Sydney
If you are experiencing blurred vision, worsening astigmatism, or frequent prescription changes, early keratoconus testing is essential. Our experienced Sydney optometrists provide advanced keratoconus diagnosis, corneal topography, specialty contact lens fitting, and ongoing management to protect your vision. Book your comprehensive keratoconus assessment today.