ABO ACTUAL ASSESSMENT SCRIPT 2026 COMPLETE QUESTIONS AND FULL SOLUTION

ABO ACTUAL ASSESSMENT SCRIPT 2026
COMPLETE QUESTIONS AND FULL
SOLUTION

●● Cornea index of refraction.
Answer: 1.37


●● Tear Film, Vitreous index of refraction.
Answer: 1.33


●● Crystalline lens index of refraction.
Answer: 1.42


●● Optical Standard index of refraction.
Answer: 1.53


●● Crown Glass index of refraction.
Answer: 1.523


●● High index of refraction.
Answer: 1.74

,●● CR-39 index of refraction.
Answer: 1.49/1.50


●● Poly index of refraction.
Answer: 1.586


●● Air.
Answer: 1.00


●● How fast does light travel through air.
Answer: 186,000 mi/sec


●● MBS formula.
Answer: ED+2 (decentration)+2


●● Focal length formula.
Answer: 1/Dioptic Power power


●● Dioptic Power formula.
Answer: 1/Focal Length

,●● Antimetropia.
Answer: Rx with unlike signs in both eyes


●● Anisometropia.
Answer: Difference of 2 diopters btwn OD & OS


●● Anisiekonia.
Answer: When images from right and left eye are so different the brain
can not achieve fusion


●● What is the Radius of a 1 diopter curve?.
Answer: 530mm


●● Radius formula.
Answer: 530/Power = Radius


●● Power formula.
Answer: 530/Radius = Power


●● Vertical Decentration formula.
Answer: Seg.ht. - B/2

, ●● How much HORIZONTAL prism tolerance is allowed?.
Answer: 2/3 of a diopter
-or-
0.667


●● How much VERTICAL prism tolerance is allowed?.
Answer: 1/3 of a diopter
-or-
0.333


●● Base Curve tolerance.
Answer: +/-0.75


●● Sphere Tolerance up to 6.50.
Answer: +/- 0.13


●● Sphere Tolerance above 6.50.
Answer: +/- 2%


●● Cylinder Tolerance >1.50.
Answer: +/-2°