Understanding Your Prescription


You may not realise it, but optometrists use a wide variety of tests and procedures to examine your eyes. These tests range from reading an eye chart to complex tests using high-powered lenses to visualize the tiny structures inside of your eyes.


Before you even enter the testing room, you will usually be taken to a pre-testing area to use two pieces of equipment.

One is an Optomap image which is fast, painless and comfortable. Nothing touches your eye at any time and it is suitable for the whole family. To have the exam, you simply look into the device one eye at a time (like looking through a keyhole) and you will see a comfortable flash of light to let you know the image of your retina has been taken.

Under normal circumstances, dilation drops might not be necessary, but your eye care practitioner will decide if your pupils need to be dilated depending on your conditions. The capture takes less than a second. Images are available immediately for review AND you can see your own retina. You see exactly what your eye care practitioner sees - even in a 3D animation.

The visual field test is a subjective measure of central and peripheral vision, or “side vision,” and is used by your doctor to diagnose, determine the severity of, and monitor your glaucoma. The most common visual field test uses a light spot that is repeatedly presented in different areas of your peripheral vision.

In some opticians, you may find the Optometrist using a different Glaucoma test in their room. More commonly though this is done as part of the pre-test before the main eye examination. This test is important as typically you have no warning signs of glaucoma until you already have significant vision loss.