ABO Advanced Formulas Exam
Questions and Answers 100% Pass
Resolving Prism= - ✔✔Vertical = (prism)(sin angle)
Horizontal = (prism) (cos angle)
Resultant Prism= - ✔✔The square root of (Vertical prism^2) + (Horizontal
prism^2)
tan a=V/H
Shape Factor= - ✔✔1/1-(T/NxF)
T=center thickness in m
N= index of refraction of lens material
F= front base curve
Power Factor= - ✔✔1/1-(HxD)
1
100% Pass Guarantee Katelyn Whitman, All Rights
, H= vertex distance plus 3 mm in m
D= Dioptric power
Spectacle Magnification= - ✔✔shape factor x power factor
1/ 1-(T/NxF) x 1/1-(HxD)
Power in Oblique Meridians= - ✔✔Total power = sphere power + cyl
power x sin^2 (O)
Snell's Law= - ✔✔N1 sin i = N2 sin r
N1= index of refraction of incident medium
i= angle of incidence
N2= index of refraction of refracting medium
r= angle of refraction
Angle of reflection= - ✔✔angle I= angle r
I= angle of incidence
r= angle of reflection
Angle of incidence= - ✔✔I=r+d
2
100% Pass Guarantee Katelyn Whitman, All Rights
Questions and Answers 100% Pass
Resolving Prism= - ✔✔Vertical = (prism)(sin angle)
Horizontal = (prism) (cos angle)
Resultant Prism= - ✔✔The square root of (Vertical prism^2) + (Horizontal
prism^2)
tan a=V/H
Shape Factor= - ✔✔1/1-(T/NxF)
T=center thickness in m
N= index of refraction of lens material
F= front base curve
Power Factor= - ✔✔1/1-(HxD)
1
100% Pass Guarantee Katelyn Whitman, All Rights
, H= vertex distance plus 3 mm in m
D= Dioptric power
Spectacle Magnification= - ✔✔shape factor x power factor
1/ 1-(T/NxF) x 1/1-(HxD)
Power in Oblique Meridians= - ✔✔Total power = sphere power + cyl
power x sin^2 (O)
Snell's Law= - ✔✔N1 sin i = N2 sin r
N1= index of refraction of incident medium
i= angle of incidence
N2= index of refraction of refracting medium
r= angle of refraction
Angle of reflection= - ✔✔angle I= angle r
I= angle of incidence
r= angle of reflection
Angle of incidence= - ✔✔I=r+d
2
100% Pass Guarantee Katelyn Whitman, All Rights
