Understand the specialized diagnostic tests for corneal thinning. Learn how Liv Hospital uses topography and tomography to plan your Keratoconus Treatment.
Send us all your questions or requests, and our expert team will assist you.
Diagnosis and Tests
To create an effective Keratoconus Treatment plan, the diagnosis must be incredibly precise. Because this condition involves microscopic changes in the thickness and curvature of the eye, standard vision tests are not enough. At Liv Hospital, we use advanced digital imaging to create a high definition map of your cornea. This allows our specialists to detect the earliest signs of bulging, even before your vision is significantly affected. Accurate diagnosis is the first and most important step in protecting your sight for the future.
Corneal topography is the primary tool used to identify and track the disease. This non-invasive test creates a three dimensional map of the front surface of the eye.
This map shows hills and valleys on the eye’s surface, allowing the specialist to see exactly how the light is being distorted as it enters the eye.
While topography looks at the front of the eye, corneal tomography allows us to see the front, the back, and the thickness of the cornea simultaneously.
This is vital because the disease often starts on the back surface before moving to the front. Tomography provides a Pachymetry Map, which is a color coded image showing the thickness across the entire cornea.
Identifying the thinnest point is essential for determining the safety of stabilization procedures like cross linking.
The surgeon uses a slit lamp to inspect the health of your eye structures under high magnification. During this test, the doctor looks for specific physical markers of the condition:
These physical signs help confirm the digital data and allow the specialist to assess the current stage of the tissue’s health.
During the diagnostic phase, we will determine your best corrected visual acuity. This test measures how well you see when we use different lenses to correct your vision. A key diagnostic indicator is when a patient cannot achieve 20/20 vision with standard glasses but can see clearly when a rigid lens is placed on the eye. This confirms that the vision loss is caused by surface irregularity rather than a problem with the retina or optic nerve.
Keratometry measures the curvature of the steepest and flattest parts of your cornea. These measurements, known as K-values, are significantly higher in eyes affected by bulging.
Monitoring these numbers over time is the most common way to track the progression of the disease. If the K-values are increasing, it is a clear sign that active Keratoconus Treatment is required.
Beyond shape and thickness, we also test the physical strength of the eye tissue. This is known as assessing corneal hysteresis. Using a gentle pulse of air, the machine measures how the cornea moves and returns to its original shape. A cornea that is thin and weak will have low resistance, indicating a high risk for further bulging. This data helps the specialist decide how aggressively the tissue needs to be strengthened.
Send us all your questions or requests, and our expert team will assist you.
A thorough diagnosis must ensure that your vision issues are not caused by something else. During your exam at Liv Hospital, we also check:
By ensuring the rest of the eye is healthy, the clinical team can focus specifically on the best corneal intervention for your needs.
Because this condition has a strong genetic component, the diagnostic phase often includes a recommendation for family screening. Siblings and children of diagnosed patients should have a baseline corneal topography scan. Identifying subclinical or “forme fruste” cases allows for the earliest possible intervention, often before the patient even notices a change in their vision. This proactive approach is the best way to prevent the disease from impacting the next generation.
Once all tests are completed, your surgeon will sit down with you to review your digital maps and measurements. We explain the exact stage of your condition and the logic behind the recommended treatment roadmap. This is your opportunity to ask questions about your lifestyle and visual goals. At Liv Hospital, we believe that an informed patient is the most successful patient, and we ensure you have a complete understanding of your diagnostic profile before moving forward.
No, the tests are completely non-invasive and usually involve simply looking at lights or into specialized cameras for a few seconds.
Contact lenses can temporarily change the shape of your cornea; we need to measure the eye in its natural state for an accurate diagnosis.
Expect to spend about ninety minutes at the clinic to complete all the advanced imaging and the physical consultation.
If the condition is stable, we may simply monitor you with regular scans every six months to ensure no changes occur in the future.
Yes, topography and thickness maps are the primary tools we use to determine if the procedure is safe and necessary for you.
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