Frequently Asked Questions
For users and clinicians
About G-Screen
What is glaucoma?
Glaucoma is an eye condition that damages the optic nerve, often without symptoms until significant vision loss has occurred. It frequently goes undiagnosed but is treatable when caught early.
Why was G-Screen created?
Most people see an optometrist when their vision worsens, but early glaucoma doesn't work like that. By the time you notice symptoms, significant damage may already be done. G-Screen was created to help more people become aware of glaucoma and see an eye care professional sooner. We're working towards multilingual support to lower barriers even further.
Who developed G-Screen?
G-Screen was developed by an Australian optometrist, with input from glaucoma ophthalmologists and vision science researchers. Meet the team.
Is this a diagnosis?
No. G-Screen is an educational awareness tool, not a diagnostic test. It presents your test data and survey responses for discussion with your eye care professional. Only a qualified eye care professional can diagnose glaucoma.
Is it free?
Yes. G-Screen is completely free to use. There are no charges, no subscriptions, and no in-app purchases. It is funded by its sponsors and developed as a public health awareness initiative.
Do I need an account?
No. G-Screen does not require an account, registration, or login. You can start the check immediately without providing any personal information. No email address or phone number is needed to use the tool.
How it works
How does the eye health check work?
G-Screen includes a brief survey about your age, family history and eye health, a near visual acuity check, and a peripheral vision test. The vision tests use Melbourne Rapid Fields (MRF) technology, which is FDA-cleared and TGA-registered. Educational content is informed by published guidelines from Glaucoma Australia.
What devices can I use?
G-Screen works on desktop computers, laptops and tablets 10 inches or larger. Smartphones are not supported because the screen is too small for accurate visual field testing. A dimly lit environment works best. You should wear your reading glasses if you normally use them.
Why doesn't G-Screen ask about diabetes or other conditions?
G-Screen focuses on key factors that can be quickly assessed. Other factors like diabetes, high myopia and steroid use are best discussed with your optometrist or eye care professional.
I'm a clinician. Can I recommend this?
Yes. G-Screen is free and designed to complement clinical practice. We welcome collaborators who share our approach — get in touch if you'd like to work together.
Results and privacy
Is my data stored?
No account or personal information is required. Anonymised results may be stored for research purposes and cannot be linked to you. If you choose to email your results, your email address is passed to a third-party delivery service and is not stored on our servers. For full details, see our Privacy Policy.
What do I do if my results are abnormal?
G-Screen does not diagnose glaucoma or any other condition. If your results suggest you may benefit from further assessment, we encourage you to book an appointment with an optometrist. Take your G-Screen results with you as a conversation starter. Many Australians are eligible for a Medicare-rebated eye exam. Find an optometrist near you.
How long are my results available?
If you choose to save your results via email or SMS, the results link remains active for 30 days. After that, the link expires and the data is deleted. You can save or print your results at any time before the link expires.