The canthal index (CI) can help to quantitate facial and ocular features.
Parameters:
(1) inner canthal distance in mm
(2) outer canthal distance in mm
canthal index as a percent =
= (inner canthal distance in mm) / (outer canthal distance) * 100
where:
• Canthal measurements differ from measurements of the orbital bone distances.
Measurements in people with normal development vary based on:
(1) age
(2) race
(3) gender
Omotade listed reference ranges for term neonates in Scotland and Nigeria.
|
Site
|
Range
|
Mean
|
|
Scotland
|
22.9 to 40.3
|
35.0
|
|
Nigeria
|
23.0 to 37.5
|
32.0
|
