ABO Practical Exam Questions and Answers
A measurement - ANSWER-horizontal frame depth
ANSI - ANSWER-American National Standards Institute: A private, non-profit
organization that coordinates the development and use of voluntary consensus
standards in the United States.
ASTM - ANSWER-American Society for Testing and Materials
B measurement - ANSWER-vertical frame depth
B& L style adjusting pliers - ANSWER-flat arm will work with pads whose mountings are
flush against the pad
Bifocal - ANSWER-lens having two focus strengths
Big Brass screwdriver - ANSWER-unscrew most screw, with a large brass handle
Bridge pressure - ANSWER-90% of eyeglass weight
too small bridge will cause irritation on the sides of the nose
to large a bridge will put unnecessary pressure on the crest of the patients nose
C- size - ANSWER-The circumference of the lens
Calculating Prismatic Effects - ANSWER-obtained at the center of an optical lens by
producing a difference in edge thickness, either by grinding the back surface at an angle
to the front surface during lens surfacing or, if the lens has sufficient power, de-
centering the optical center of the lens
Cancelling Prism - ANSWER-BI & BO
BD & BD
BU & BU
chappel cutting pliers - ANSWER-he Chappel Cutting Plier cuts screw assemblies and
reduces the risk of damaging lenses
Circumference gauge - ANSWER-For quick and accurate measurements of lenses or
patterns.
Compounding Prism - ANSWER-BI & BI
BO & BO
BU & BD
Corneal reflex Pupilometer - ANSWER-for precisely measuring and digitally recording
pupillary distances. Used for measuring of monocular and binocular
, Datum Line - ANSWER-180 line, reference point for measurements
DBC - ANSWER-distance between centers, also referred to as the frame PD or FPD
DBL - ANSWER-distance between lenses, smallest linear measurement between
lenses
Digital Measurement System - ANSWER-takes measurements digitally for pd, seg
height, and oc
Distometer - ANSWER-An instrument for measuring vertex distance.
ear pressure - ANSWER-90% of adjustment to make it feel comfortable
ED - ANSWER-effective diameter, twice the longest radius of the lens
EPA - ANSWER-Environmental protection agency, an independent federal agency
established to coordinate programs aimed at reducing pollution and protecting the
environment
European pad adjusting pliers - ANSWER-designed specifically for screw and snap in
type nosepad adjustment. box shaped indentation fits around the nosepad box.
opposite jaw is curved to mimic the shape of the pad itself. curved arm is padded tp
protect the pads when working with soft silicone pads
eyewire sizing pliers - ANSWER-used to check the size of the lens without damaging
the barrels of the frame
FDA - ANSWER-Food and Drug Administration. The agency that is responsible for
determining if a food or drug is safe and effective enough to be sold to the public.
Fitting traingle - ANSWER-frame should touch at three points, the bridge and the skull
at the crotch of each ear. the pressure at these points must be balanced and evenly
distributed along the fullest possible contact area
Flat/round Nose Pliers - ANSWER-used to change the curvature of pad arm loops.
positioned so the loop is bent around the round tip
Frontal angle nose pads - ANSWER-angle from the bridge center down along the length
of the pad surface
FTC - ANSWER-Federal Trade Commission. Protects consumers from misleading and
fraudulent advertising. Reviews advertising claims. Can order a company to change
their ad
A measurement - ANSWER-horizontal frame depth
ANSI - ANSWER-American National Standards Institute: A private, non-profit
organization that coordinates the development and use of voluntary consensus
standards in the United States.
ASTM - ANSWER-American Society for Testing and Materials
B measurement - ANSWER-vertical frame depth
B& L style adjusting pliers - ANSWER-flat arm will work with pads whose mountings are
flush against the pad
Bifocal - ANSWER-lens having two focus strengths
Big Brass screwdriver - ANSWER-unscrew most screw, with a large brass handle
Bridge pressure - ANSWER-90% of eyeglass weight
too small bridge will cause irritation on the sides of the nose
to large a bridge will put unnecessary pressure on the crest of the patients nose
C- size - ANSWER-The circumference of the lens
Calculating Prismatic Effects - ANSWER-obtained at the center of an optical lens by
producing a difference in edge thickness, either by grinding the back surface at an angle
to the front surface during lens surfacing or, if the lens has sufficient power, de-
centering the optical center of the lens
Cancelling Prism - ANSWER-BI & BO
BD & BD
BU & BU
chappel cutting pliers - ANSWER-he Chappel Cutting Plier cuts screw assemblies and
reduces the risk of damaging lenses
Circumference gauge - ANSWER-For quick and accurate measurements of lenses or
patterns.
Compounding Prism - ANSWER-BI & BI
BO & BO
BU & BD
Corneal reflex Pupilometer - ANSWER-for precisely measuring and digitally recording
pupillary distances. Used for measuring of monocular and binocular
, Datum Line - ANSWER-180 line, reference point for measurements
DBC - ANSWER-distance between centers, also referred to as the frame PD or FPD
DBL - ANSWER-distance between lenses, smallest linear measurement between
lenses
Digital Measurement System - ANSWER-takes measurements digitally for pd, seg
height, and oc
Distometer - ANSWER-An instrument for measuring vertex distance.
ear pressure - ANSWER-90% of adjustment to make it feel comfortable
ED - ANSWER-effective diameter, twice the longest radius of the lens
EPA - ANSWER-Environmental protection agency, an independent federal agency
established to coordinate programs aimed at reducing pollution and protecting the
environment
European pad adjusting pliers - ANSWER-designed specifically for screw and snap in
type nosepad adjustment. box shaped indentation fits around the nosepad box.
opposite jaw is curved to mimic the shape of the pad itself. curved arm is padded tp
protect the pads when working with soft silicone pads
eyewire sizing pliers - ANSWER-used to check the size of the lens without damaging
the barrels of the frame
FDA - ANSWER-Food and Drug Administration. The agency that is responsible for
determining if a food or drug is safe and effective enough to be sold to the public.
Fitting traingle - ANSWER-frame should touch at three points, the bridge and the skull
at the crotch of each ear. the pressure at these points must be balanced and evenly
distributed along the fullest possible contact area
Flat/round Nose Pliers - ANSWER-used to change the curvature of pad arm loops.
positioned so the loop is bent around the round tip
Frontal angle nose pads - ANSWER-angle from the bridge center down along the length
of the pad surface
FTC - ANSWER-Federal Trade Commission. Protects consumers from misleading and
fraudulent advertising. Reviews advertising claims. Can order a company to change
their ad
