Cirrus HD-OCT: Revealing the complete picture.

Cirrus HD-OCT offers the ultimate benefit for people livingwith glaucoma - the best possible care. Early detection helps your optometrist to diagnose and control glaucoma before permanent damage is done. If you have glaucoma or are developing glaucoma, Cirrus HD-OCT enables your optometrist to watch closely for the slightest changes and respond as needed. Cirrus HD-OCT gives your optometrist high-quality, highly accurate knowledge of your eyes that is simply unavailable with any other technology. The extremely detailed understanding of your eyes can be instrumental and essential to safeguarding your vision for many years to come.

What is glaucoma?

Glaucoma is a progressive disease of the optic nerve.

It can be associated with elevated pressure inside the eye and can lead to permanent vision loss.

There are usually no symptoms at first. As the disease progresses, a person with glaucoma may not notice his or her vision gradually failing.

Your optometrist can use a highly innovative instrument called Cirrus™ HD-OCT. This
advanced-technology instrument never touches your eye, so there’s no discomfort. It’s safe and requires only a few minutes. Most importantly, the Cirrus HD-OCT helps your optometrist to clearly see the internal structures of your eye, so problems can be treated before they progress. The unique view that your optometrist sees with Cirrus HD-OCT is called a direct cross-sectional image of your retina.

What is direct cross-sectional retinal imaging?

The retina is the innermost lining of the inside of your eye. It is composed of several layers, and functions like the film in a camera. The lens of the eye focuses images on your retina, much like the lens of a camera focuses images on film. These images are transmitted to your brain by the optic nerve, enabling you to see.

Direct cross-sectional imaging enables your optometrist to look directly at a “cutaway” view of the layers of the retina and optic nerve, and accurately measure their characteristics. Other machines show the surface of these structures, but Cirrus HD-OCT also shows your optometrist what is below the surface.

What does direct cross-sectional retinal imaging offer that’s unique?

With Cirrus HD-OCT’s ability to image the individual layers of retina, your optometrist can see and measure delicate structures and monitor any changes. OCT imaging is the only technology that provides these cross sectional images, so it’s the ultimate tool for precise diagnosis and treatment.

What can direct cross-sectional imaging tell my optometrist about glaucoma?

Cirrus HD-OCT enables your optometrist to perform multiple analyses for glaucoma. The three most common tests are:

  • Retinal Nerve Fibre Layer (RNFL) Analysis reveals the thickness of the layer of the retina that contains nerve fibres that travel up the optic nerve. If glaucoma is present, that layer may gradually lose thickness.
  • Macular Thickness Analysis examines the condition and thickness of the macula, which is the part of the retina that provides central vision. Thinning of the macula is a possible sign of glaucoma progression.
  • Optic Nerve Head Analysis reveals the structure of the optic nerve where it originates in the retina. With glaucoma, the “cup” in the optic nerve may enlarge.