Prentice rule - Study guides, Class notes & Summaries

ABO Study Guide Questions with Complete Solutions Prentice Rule - ANSWER (Power x distance in mm) /10 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 ...

ABO Study Guide Questions & Answers Passed Prentice Rule - ️️ (Power x distance in mm) /10 Cornea index of refraction - ️️ 1.37 Tear Film, Vitreous index of refraction - ️️ 1.33 Crystalline lens index of refraction - ️️ 1.42 Optical Standard index of refraction - ️️ 1.53 Crown Glass index of refraction - ️️ 1.523 High index of refraction - ️️ 1.74 CR-39 index of refraction - ️️ 1.49/1.50 Poly index of refraction - ️️ 1.586 Air - ️️ 1.00 How fast...

ABO Practical Exam Questions and Answers 2024 Cancelling effect- subtract prism amounts -Answer-BU/BU BD/BD BI/BO Powers between 0.00 & +/- 3.00 -Answer-Read in 1/8 diopters .12 .37 .62 .87 Lensometer is also referred to as -Answer-Lensmeter, focimeter, vertometer To focus eyepiece -Answer-1) while turned off. Place white sheet of paper against lens stop. 2) turn focus ring all the way counter clockwise,and then back clockwise until sharp. 3) remove paper and turn lensometer on 4) ...

ABO Practical Exam Questions And Correct Answers, With Complete Verified Solution. Cancelling effect- subtract prism amounts BU/BU BD/BD BI/BO Powers between 0.00 & +/- 3.00 Read in 1/8 diopters .12 .37 .62 .87 Lensometer is also referred to as Lensmeter, focimeter, vertometer To focus eyepiece 1) while turned off. Place white sheet of paper against lens stop. 2) turn focus ring all the way counter clockwise,and then back clockwise until sharp. 3) remove paper and turn lensomet...

Prentice Rule - ANS (Power x distance in mm) /10 Cornea index of refraction - ANS 1.37 Tear Film, Vitreous index of refraction - ANS 1.33 Crystalline lens index of refraction - ANS 1.42 Optical Standard index of refraction - ANS 1.53 Crown Glass index of refraction - ANS 1.523 High index of refraction - ANS 1.74 CR-39 index of refraction - ANS 1.49/1.50 Poly index of refraction - ANS 1.586 Air - ANS 1.00 How fast does light travel throu...

Cancelling effect- subtract prism amounts - BU/BU BD/BD BI/BO Powers between 0.00 & +/- 3.00 - Read in 1/8 diopters .12 .37 .62 .87 Lensometer is also referred to as - Lensmeter, focimeter, vertometer To focus eyepiece - 1) while turned off. Place white sheet of paper against lens stop. 2) turn focus ring all the way counter clockwise,and then back clockwise until sharp. 3) remove paper and turn lensometer on 4) move power drum to high plus, then turn away from you until sharp- shoul...

ABO Practical Exam Questions And Correct Answers, With Complete Verified Solution. Cancelling effect- subtract prism amounts BU/BU BD/BD BI/BO Powers between 0.00 & +/- 3.00 Read in 1/8 diopters .12 .37 .62 .87 Lensometer is also referred to as Lensmeter, focimeter, vertometer To focus eyepiece 1) while turned off. Place white sheet of paper against lens stop. 2) turn focus ring all the way counter clockwise,and then back clockwise until sharp. 3) remove paper and turn lensomet...

When should you use occluder? - For noticeable eye abnormalities. Ex.: Strabismus. Also to check binocular PD by occluding each eye to see if eye moved when occluded. BD/BD - Cancels- subtract BI/BI - Compounds- add BI/BO - Cancels- subtract Binocular PD - Total PD of both eyes together. From one pupil to the other pupil. Black numbers on lensometer power drum - (+) BO/BO - Compounds- add BU/BD - Compounds- add BU/BU - Cancels- subtract Cancelling effect- subtract prism amounts - BU/BU...

Resolving Prism= - ANSWER-Vertical = (prism)(sin angle) Horizontal = (prism) (cos angle) Resultant Prism= - ANSWER-The square root of (Vertical prism^2) + (Horizontal prism^2) tan a=V/H Shape Factor= - ANSWER-1/1-(T/NxF) T=center thickness in m N= index of refraction of lens material F= front base curve Power Factor= - ANSWER-1/1-(HxD) H= vertex distance plus 3 mm in m D= Dioptric power Spectacle Magnification= - ANSWER-shape factor x power factor 1/ 1-(T/NxF) x 1/1-(HxD) ...

ABO -American Board of Opticianry Practical Exam Questions and Answers Cancelling effect- subtract prism amounts{Answer: - BU/BU BD/BD BI/BO Powers between 0.00 & +/- 3.00{Answer: - Read in 1/8 diopters .12 .37 .62 .87 Lensometer is also referred to as{Answer: - Lensmeter, focimeter, vertometer To focus eyepiece{Answer: - 1) while turned off. Place white sheet of paper against lens stop. 2) turn focus ring all the way counter clockwise,and then back clockwise until sharp. 3) ...