Corneal Topography

Corneal topography is an advanced eye imaging test used to map the shape and curvature of the cornea. The cornea is the clear front surface of the eye that plays an important role in focusing light for clear vision. A corneal topography scan provides a detailed map of the cornea, allowing eye care professionals to detect irregularities that may affect vision.

At Eyesight.sg, corneal topography in Singapore is performed using modern diagnostic technology to help assess corneal health, guide contact lens fitting, and evaluate suitability for certain vision correction procedures. The scan is quick, non-invasive, and provides valuable information about the structure of the eye.

What Is Corneal Topography?

A corneal topography test is a specialised imaging procedure that measures the curvature and shape of the cornea. The test produces a detailed colour-coded map of the corneal surface, helping optometrists understand how light enters the eye and how well the cornea focuses vision.

Because the cornea plays such an important role in visual clarity, even small changes in its shape can affect vision quality. A corneal imaging test helps identify these changes early and supports accurate diagnosis of various corneal conditions.

Corneal topography is commonly used to assess:

• Corneal shape and curvature
• Irregular astigmatism
• Early signs of keratoconus
• Contact lens fitting requirements
• Suitability for refractive procedures

The information collected during the scan helps eye care professionals develop appropriate treatment or monitoring plans when needed.

How Corneal Topography Works?

Corneal topography works by projecting light patterns onto the surface of the cornea. The way these patterns reflect back from the eye allows the device to measure the curvature of the cornea with high precision.

The system then converts this information into a detailed visual map that shows the shape of the cornea. This map helps identify areas where the cornea may be steeper, flatter, or irregular.

Because every person’s cornea is unique, these measurements help eye care professionals provide more personalised vision care and treatment recommendations.

Who May Need a Corneal Topography Test?

A corneal topography scan may be recommended for a variety of reasons related to eye health and vision correction.

Patients Considering Contact Lenses

Corneal topography helps optometrists understand the exact shape of the cornea, which is important when fitting certain types of contact lenses. A properly fitted lens improves comfort and vision quality.

Patients Evaluating Vision Correction Procedures

People considering refractive procedures such as LASIK often undergo a corneal imaging test to determine whether the cornea is suitable for treatment.

Patients with Irregular Vision

Individuals who experience blurred or distorted vision that cannot be fully corrected with glasses may benefit from corneal topography testing.

Monitoring Corneal Conditions

Corneal topography is often used to monitor conditions such as keratoconus, where the cornea gradually changes shape over time.

The Corneal Topography Test Procedure

A corneal topography test is simple and usually takes only a few minutes to complete.

Step 1: Preparation

You will sit comfortably in front of the imaging device while resting your chin on a support. The eye care professional will guide you to look at a fixed target.

Step 2: Corneal Imaging Scan

The device projects rings or light patterns onto the surface of the eye. These reflections are captured by the system to analyse the shape of the cornea.

Step 3: Corneal Surface Mapping

The system processes the information and generates a detailed colour-coded map of the corneal surface.

Step 4: Result Evaluation

The optometrist reviews the corneal map to identify any irregularities and determine whether further evaluation or treatment is needed.

The entire process is painless and does not involve direct contact with the eye.

Why Corneal Topography Is Important?

Corneal topography provides detailed information about the cornea that cannot be obtained through a basic eye examination.

Early Detection of Corneal Irregularities

Subtle changes in the shape of the cornea may indicate early signs of certain eye conditions. Early detection allows appropriate monitoring and care.

Improved Contact Lens Fitting

Some contact lenses require precise fitting to match the natural shape of the cornea. Corneal topography helps ensure a comfortable and accurate fit.

Assessment Before Vision Correction Procedures

Before undergoing certain vision correction procedures, the structure and thickness of the cornea must be evaluated carefully. Corneal imaging helps determine whether the eye is suitable for these treatments.

Monitoring Changes Over Time

For patients with known corneal conditions, repeated corneal topography scans allow eye care professionals to monitor how the cornea changes over time.

Corneal Topography Test Cost in Singapore

The cost of a corneal topography test in Singapore may vary depending on the clinic and whether the scan is performed as part of a comprehensive eye examination or a specialised evaluation.

Many patients undergo corneal topography when being assessed for contact lenses, refractive surgery, or monitoring corneal health conditions. Your optometrist can advise whether this imaging test is recommended based on your eye examination results.

Frequently Asked Questions About Corneal Topography in Singapore

Q: Is a corneal topography test painful?

A: No. The test is completely non-invasive and painless. The imaging device measures the shape of the cornea without touching the eye.

Q: How long does a corneal topography scan take?

A: The scan usually takes only a few minutes and is often completed during a routine eye examination.

Q: Do I need corneal topography before getting contact lenses?

A: In some cases, especially for specialised contact lenses, corneal topography helps ensure the lenses fit properly and comfortably.

Q: Can corneal topography detect eye problems?

A: The scan helps detect irregularities in the cornea and can assist in identifying conditions such as keratoconus or irregular astigmatism.

Q: How often should corneal topography be performed?

A: The frequency depends on your eye health and whether you are monitoring a specific condition. Your optometrist can recommend an appropriate schedule.

Get a Professional Corneal Topography Scan in Singapore

If you are experiencing vision changes, considering contact lenses, or evaluating vision correction options, a corneal topography scan can provide valuable insight into the health and structure of your eyes.

At Eyesight.sg, our optometrists perform comprehensive eye examinations and advanced corneal imaging to help patients understand their eye health and explore appropriate vision care solutions.