ABO Advanced Formulas with 100%
correct question and answers
Resolving Prism= - correct answer <<<<<<<<<<<Vertical = (prism)(sin angle)
Horizontal = (prism) (cos angle)
Resultant Prism= - correct answer <<<<<<<<<<<The square root of (Vertical prism^2) + (Horizontal
prism^2)
tan a=V/H
Shape Factor= - correct answer <<<<<<<<<<<1/1-(T/NxF)
T=center thickness in m
N= index of refraction of lens material
F= front base curve
Power Factor= - correct answer <<<<<<<<<<<1/1-(HxD)
H= vertex distance plus 3 mm in m
D= Dioptric power
Spectacle Magnification= - correct answer <<<<<<<<<<<shape factor x power factor
1/ 1-(T/NxF) x 1/1-(HxD)
Power in Oblique Meridians= - correct answer <<<<<<<<<<<Total power = sphere power + cyl power x
sin^2 (O)
Snell's Law= - correct answer <<<<<<<<<<<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= - correct answer <<<<<<<<<<<angle I= angle r
I= angle of incidence
r= angle of reflection
Angle of incidence= - correct answer <<<<<<<<<<<I=r+d
I= angle of incidence
r= angle of refraction
d= deviation
Index of refraction= - correct answer <<<<<<<<<<<Speed of light in a vacuum/Speed of light in the
medium
Prentice Rule= - correct answer <<<<<<<<<<<Prism= (hxd)/10
h=distance moved in mm
D= total dioptric power for the meridian
Thick Lens Back Vertex Power= - correct answer <<<<<<<<<<<De= D1+D2+ (t/n x D1^2)
De= effective, vertex or lensometer power
D1= true power of the front curve
D2= ture power of the back curve
t= lens thickness in meters
n= index of refraction
Focal length - correct answer <<<<<<<<<<<D=1/f
correct question and answers
Resolving Prism= - correct answer <<<<<<<<<<<Vertical = (prism)(sin angle)
Horizontal = (prism) (cos angle)
Resultant Prism= - correct answer <<<<<<<<<<<The square root of (Vertical prism^2) + (Horizontal
prism^2)
tan a=V/H
Shape Factor= - correct answer <<<<<<<<<<<1/1-(T/NxF)
T=center thickness in m
N= index of refraction of lens material
F= front base curve
Power Factor= - correct answer <<<<<<<<<<<1/1-(HxD)
H= vertex distance plus 3 mm in m
D= Dioptric power
Spectacle Magnification= - correct answer <<<<<<<<<<<shape factor x power factor
1/ 1-(T/NxF) x 1/1-(HxD)
Power in Oblique Meridians= - correct answer <<<<<<<<<<<Total power = sphere power + cyl power x
sin^2 (O)
Snell's Law= - correct answer <<<<<<<<<<<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= - correct answer <<<<<<<<<<<angle I= angle r
I= angle of incidence
r= angle of reflection
Angle of incidence= - correct answer <<<<<<<<<<<I=r+d
I= angle of incidence
r= angle of refraction
d= deviation
Index of refraction= - correct answer <<<<<<<<<<<Speed of light in a vacuum/Speed of light in the
medium
Prentice Rule= - correct answer <<<<<<<<<<<Prism= (hxd)/10
h=distance moved in mm
D= total dioptric power for the meridian
Thick Lens Back Vertex Power= - correct answer <<<<<<<<<<<De= D1+D2+ (t/n x D1^2)
De= effective, vertex or lensometer power
D1= true power of the front curve
D2= ture power of the back curve
t= lens thickness in meters
n= index of refraction
Focal length - correct answer <<<<<<<<<<<D=1/f
