Specialised Tests


At Jason Harley Optometrists we have access to advanced diagnostic tests that mean we can offer complete eye health assessment.

Optos Daytona Ultra Wide Field Scanning (Optomap)

This is the latest addition to our suite of advanced testing devices.


The Optos Daytona is a retinal imaging device that represents a quantum leap in our ability to view and analyse retinal pathology.


The Retina extends for about 240 degrees at the back of the eye. Normal retinal cameras allow an Optometrist to image about 45 degrees, or 1/5 of the whole retina. The Optos images up to 200 degrees or 80% of the retina. The scan takes only a matter of seconds.

These images allow the Optometrist to see both the central and outer reaches of the Retinae in detail, and to complete further analysis to determine if there are any areas of concern. This instrument is particularly useful in monitoring diabetic retinopathy, macular degeneration, glaucoma and retinal detachment.

The images are astounding and we have identified pathology that would  have otherwise been hidden from view.

The Optos Daytona Scanning Laser Ophthalmoscope                                       Optomap Image of projected Wet AMD

Optical Coherence Tomography (OCT)


One of the major advances in retinal examination over the past ten years has been the ability to construct two dimensional images of the inside of the eye with an OCT. These devices measure the optical reflection of light from the different structures within the eye. These instruments can see within these structures.



optos daytona.jpg

OCT image showing cystoid spaces at the macula

The OCT is particularly effective in examining the macula for any signs of degeneration, particularly Wet AMD which requires urgent attention. The instrument is also great at looking for evidence of glaucomatous damage to the Optic Nerve.


We have an Optovue OCT in Merimbula which can quickly and painlessly screen the maculae and optic nerve heads for any signs of damage. This test is not done routinely, however you can request to have an OCT done if you have any concerns or perhaps a family history of macular degeneration or glaucoma.


There is a fee for this extra test. Ask our receptionist for information when you book
your appointment.




Visual Field Testing:


Damage to the Optic nerve at the back of the eye can lead to a loss of central or peripheral vision.


This damage can be as the result of trauma, vascular accident, tumour or disease. The most common cause of field loss is Glaucoma, a degenerative disease of the optic nerve.


Field testing machines can measure and quantify visual fields and compare them to normal or determine the degree and position of abnormality.  These instruments now perform an important role in assessing ocular health and are indispensable in modern optometry.


Our practices have computerised perimeters that are quick, reliable and able to identify field losses at a very early stage.  Most field tests are covered under Medicare and are performed as indicated by the Optometrist.


Digital Retinal Photography:


Digital cameras are used to record the appearance of the retina at the back of your eyes.


They are used when the Optometrist determines there is some abnormality that should be monitored, or to establish a baseline appearance for future reference.


We have digital cameras at both practice locations. They are used routinely in diabetic screenings and as required otherwise.


There is sometimes a small charge for digital image capture.


Binocular Indirect Ophthalmoscopy (BIO):


The BIO is used to gain a wider field of view of the back of the eye when there is some concern for pathology in the peripheral retina.


It is usual to dilate the pupil with a drop so that the optometrist can gain a better image of the retina.




Opthalmoscopic appearance of the

retina to show the macula lutea

(yellow around fovea)

Zeiss Visucam Digital

Fundus Camera