Glaucoma

Four questions people ask, put to Google AI Overviews, Google AI Mode and ChatGPT in November 2026.

Got the NHS facts right
Got the NHS facts right
Got the NHS facts right
Got the NHS facts right
Cited NHS or accredited sources
Cited NHS or accredited sources
Cited NHS or accredited sources
Cited NHS or accredited sources

The questions

Question
The NHS says
AI Overviews
AI Mode
ChatGPT
What is the Glaucoma UK helpline number?
01233 64 81 70
–
Google AI Mode Yes
The NHS says glaucoma UK helpline: 01233 64 81 70
ChatGPT (logged out) Yes
The NHS says glaucoma UK helpline: 01233 64 81 70
How often should I get an eye test to check for glaucoma?
Every 2 years
Google AI Overviews Unconfirmed The first check found different: Contradicts the NHS. The NHS says: Eye test every 2 years. The second check disagreed, so it isn’t counted.
Google AI Mode Matches the NHS
The NHS says eye test every 2 yearsEngland
ChatGPT (logged out) Matches the NHS
The NHS says eye test every 2 yearsEngland
Does glaucoma always cause symptoms like eye pain?
Usually none
Google AI Overviews Matches the NHS
The NHS says usually no symptoms
Google AI Mode Matches the NHS
The NHS says usually no symptoms
ChatGPT (logged out) Matches the NHS
The NHS says usually no symptoms
Can glaucoma be cured?
No cure
Google AI Overviews Matches the NHS
The NHS says no cure, treatment slows damage
Google AI Mode Matches the NHS
The NHS says no cure, treatment slows damage
ChatGPT (logged out) Matches the NHS
The NHS says no cure, treatment slows damage
Matches the NHS Unconfirmed

Where the answers came from

Answers, of 9 with sources
NHS websiteNHS6
Glaucoma UKUK charity on the PIF TICK list4 Glaucoma Research FoundationUS website2 JAMA NetworkUS health website2 Mayo ClinicUS hospital1
Medical Eye ClinicUK health company1

Where the answers came from

Answers, of 3 with sources
Glaucoma Research FoundationUS website2
NHS websiteNHS2
JAMA NetworkUS health website2 Mayo ClinicUS hospital1
Medical Eye ClinicUK health company1
Glaucoma UKUK charity on the PIF TICK list1

Where the answers came from

Answers, of 4 with sources
NHS websiteNHS3
Glaucoma UKUK charity on the PIF TICK list1
Ophthalmology TimesUS website1

Where the answers came from

Answers, of 2 with sources
Glaucoma UKUK charity on the PIF TICK list2
NHS websiteNHS1
UK charities for glaucoma Glaucoma UKRNIB