What is an OCT scan?

Why do I need an OCT scan?

Your eye care professional will recommend an OCT scan depending on factors specific to your eye health. This may form part of a comprehensive eye test every few years, but this will vary depending on your eye care professional and your medical history.

Your eye care professional may recommend more frequent OCT scans if you:

• are over 65,
• are experiencing new symptoms or changes in your vision,
• have been diagnosed with a progressive eye condition which requires monitoring, or;
• have a high risk of developing an eye condition.

OCT can be used to identify and monitor a number of eye conditions, including macular degeneration and other conditions affecting the macula, glaucoma, diabetic retinopathy, among others.

What happens during an OCT scan?

An OCT scan typically takes five to 10 minutes at most. You will be instructed to place your chin on a rest and look forward into the OCT machine, usually at a coloured light or cross at the back of the machine. The machine will then scan each eye one at a time and you may see a flash of light across the eye being scanned. The exam is completely painless and non-invasive, and the results will be available instantly for your eye care professional to review with you.

Your eye care professional may use dilating eye drops in your eyes to provide a clear image. This can increase the length of your appointment as the drops can take up to 30 minutes to work. Most people find the drops painless, but they may cause temporary light sensitivity and blurred vision for a few hours afterwards. If you suspect your eye care professional may dilate your eyes during an appointment, it may be helpful to bring a pair of sunglasses and plan not to drive after the appointment. You can call your eye care professional’s practice ahead of time if you are unsure whether they might dilate your eyes during your appointment. Read our article about pupil dilation during eye exams.

Is OCT covered under Medicare?

Most eye care professionals charge a fee for an OCT scan; however, the amount will depend on your specific practitioner. Some practitioners may waive this additional fee, but this is at their own discretion. To find out about the costs associated with your eye appointment, it is best to speak with the practice directly.

What is fundus photography?

Fundus photography is another method your eye care professional may use to examine the back of your eye, detecting similar conditions to an OCT scan in the same amount of time. While OCT measures the layers and structures of the retina, fundus photography provides a 2D picture of the back of the eye . Your eye care professional will be able to explain which examination they will perform and what is most appropriate for your eyes.

For more information

Always speak to your eye care professional about the best treatment options for you.