ABO Advanced Formulas Exam Questions and Answers 100% Pass

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)



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, 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

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