Biometry Flashcards
1
Q
What formula for axial length < 22mm
A
Hagis
Hoffer Q
2
Q
What formula if AL 22- 26mm
A
SRK/T or Barret Universal II
3
Q
What formula if AL > 26mm
A
Hagis
SRK/T
4
Q
What formula if prev refractive surgery
A
Haigis L
5
Q
What is axial length difference < 0.3mm between eyes
A
Check if prev refraction - anisometropia/amblyopia
Consider repeating or confirm with US
6
Q
When should CL be removed prior to biometry
A
Soft lenses 1 week
Rigid gas permeable 2-4 weeks
7
Q
When should you repeat biometry
A
< 4 years
IOL exchange required
Prev corneal surgery or progressive corneal disease
