Biometry

What is biometry?

Biometry, also known as ocular biometry or eye biometry, is a non-invasive test used to measure the various structures of the eye. It plays a crucial role in planning for cataract surgery by helping determine the correct power of the intraocular lens (IOL) that will be implanted in place of the clouded natural lens.

Using highly accurate optical technology, biometry provides essential information about the shape and size of the eye. These measurements ensure the best possible vision outcomes after cataract surgery.

What is Lenstar Biometry?

Lenstar biometry refers to a specific type of biometry performed using the Lenstar LS 900, an advanced optical device. This machine uses Optical Low-Coherence Reflectometry (OLCR) to measure eye dimensions with exceptional precision.

The Lenstar LS 900 is known for its accuracy and reliability. It is often preferred by eye surgeons for its ability to deliver multiple detailed eye measurements in one quick session, making it an ideal tool for IOL power calculation before cataract surgery.

What is Lenstar biometry test used for?

The Lenstar biometry test is used to gather key measurements of the eye, including:

Axial length – the length of the eyeball, from the front (cornea) to the back (retina)
Corneal thickness – how thick the front surface of the eye is
Anterior chamber depth – the space between the cornea and the lens
Lens thickness – the size of the eye’s natural lens

These measurements are essential for calculating the right IOL power. Accurate IOL power selection ensures the patient achieves the best vision possible after cataract surgery, reducing or eliminating the need for glasses.

How is biometry test done?

The biometry test is simple, painless, and non-contact. Here’s what you can expect:

1. Patient Setup and Eye Alignment : The patient is comfortably seated, and the eye is aligned using an internal fixation target to ensure accuracy.
2. Measurement and Data Collection :The Lenstar takes multiple optical scans of the eye. It collects data on axial length, lens thickness, and more. The technician ensures each scan meets the required signal quality.
3. IOL Power Calculation and Report Generation : Using modern IOL calculation formulas like Barrett, Haigis, or Hoffer Q, the system calculates the most suitable lens power for surgery. A full report is generated for the surgeon’s review.

How Long Does the Biometry Test Take?

The Lenstar biometry test typically takes around 10–15 minutes to complete. It is quick, safe, and efficient, making it a standard part of the pre-cataract surgery assessment process.

Why is Biometry Important Before Cataract Surgery?

Accurate eye measurements are critical to ensuring successful outcomes in cataract surgery. Choosing the wrong IOL power can lead to blurred vision or dependence on glasses after the surgery. Biometry using the Lenstar 900 helps eliminate this risk by providing precise data that leads to personalized treatment for each patient.

Book Your Biometry Test

If you’re preparing for cataract surgery, your ophthalmologist may recommend a Lenstar biometry test as part of your pre-operative evaluation. To learn more or schedule an appointment, contact our centre today.

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