Increased disk size in glaucomatous eyes vs normal eyes in the Reykjavik eye study.
OBJECTIVE
To evaluate the use of disk diameter as an indicator in the identification of glaucomatous optic neuropathy.


METHODS
We evaluated all available stereofundus photographs for 1,040 right eyes obtained in the Reykjavik Eye Study. Horizontal and vertical disk diameters were determined in a masked manner by a glaucoma specialist (K.F.D.). All disk diameters were corrected for refractive error.


RESULTS
There were significant differences (P <.05) between the corrected vertical disk diameters of normal subjects (0.189 +/- 0.018 inches) and those suspected of having glaucoma (0.202 +/- 0.020 inches) as well as between the normal and the glaucoma groups (0.206 +/- 0.029 inches). The corrected horizontal measurement showed the same pattern.


CONCLUSIONS
In the Reykjavik Eye Study, optic disks meeting structural criteria for glaucoma are significantly larger than normal nerves.
Wang
Lan
L
University of Ottawa Eye Institute, Ottawa, Ontario, Canada.
Damji
Karim F
KF
Munger
Rejean
R
Jonasson
Fridbert
F
Arnarsson
Arsaell
A
Sasaki
Hiroshi
H
Sasaki
Kazuyuki
K
D005902:Glaucoma, Open-Angle / Q000175:diagnosis*; D006801:Humans; D007055:Iceland; D008875:Middle Aged; D009798:Ocular Hypertension / Q000175:diagnosis; D009898:Optic Disk / Q000473:pathology*; D009901:Optic Nerve Diseases / Q000175:diagnosis*; D010781:Photography; D012372:ROC Curve