-
1
The 'Halo Sign' is a novel optical phenomenon linked to advanced keratoconus.
-
2
It appears as an annular light projection during slit-lamp examination.
-
3
Eight out of 22 examined eyes showed the sign, indicating advanced disease.
-
4
Halo Morphology Index (HMI) measures halo shape variability.
-
5
Halo-positive eyes have worse visual acuity and higher aberrations.
-
6
The Halo Sign should complement, not replace, existing diagnostic methods.
Original Source(s)
Related Content
Inside the Aging Eye
A comprehensive new Elsevier publication brings global expertise together to unpack how aging drives ocular structure, function, and disease
April 28, 2026
-
2 min
Keeping an Eye on Diabetes
Progress, pitfalls and the future of the UK’s Diabetic Eye Screening Program
April 28, 2026
-
7 min
Shape-Changing IOL Shows Durability
Atia Vision reports positive 36-month data for its shape-changing IOL at ASCRS 2026
April 28, 2026
-
3 min
