ABO/NAO 5 Exam Questions and
Answers 100% Pass
what is the average convergence distance in children - CORRECT ANSWER-
2mm instead of 3mm in adults
what is the refractive index of highlite lenses - CORRECT ANSWER-1.70
chem-tempering makes a clear glass lens more impact resistant by placing the lens
in a potassium nitrate bath. the lens undergoes a process known as what? -
CORRECT ANSWER-ion exchange
what is the formula for the index of refraction - CORRECT ANSWER-index of
refraction=velocity of light in air over velocity of light in other media
what is polyamide - CORRECT ANSWER-a nylon-based material that is very
strong. it can be made thinner and is lighter than cellulose acetate. can be made
translucent, is resistant to chemicals and solvents and is hypoallergenic
when fitting a patient with progressive addition lenses for optimum performance,
what is the vertex and pantoscopic tilt, and is face form required? - CORRECT
ANSWER-the frame should have sufficient face form, a short vertex distance as
long as the eyelashes do not touch the lens and should be adjustable for
pantoscopic angle of 10 to 12 degrees
Answers 100% Pass
what is the average convergence distance in children - CORRECT ANSWER-
2mm instead of 3mm in adults
what is the refractive index of highlite lenses - CORRECT ANSWER-1.70
chem-tempering makes a clear glass lens more impact resistant by placing the lens
in a potassium nitrate bath. the lens undergoes a process known as what? -
CORRECT ANSWER-ion exchange
what is the formula for the index of refraction - CORRECT ANSWER-index of
refraction=velocity of light in air over velocity of light in other media
what is polyamide - CORRECT ANSWER-a nylon-based material that is very
strong. it can be made thinner and is lighter than cellulose acetate. can be made
translucent, is resistant to chemicals and solvents and is hypoallergenic
when fitting a patient with progressive addition lenses for optimum performance,
what is the vertex and pantoscopic tilt, and is face form required? - CORRECT
ANSWER-the frame should have sufficient face form, a short vertex distance as
long as the eyelashes do not touch the lens and should be adjustable for
pantoscopic angle of 10 to 12 degrees
