1
ABO NCLE EXAM QUESTIONS AND
ANSWERS (VERIFIED ANSWERS GRADED
A+) LATEST UPDATE 2025/2026
A condition of the eye in which light focuses in front of the retina. Caused by
either the eye being too strong or the globe of the eye being too long -
(ANSWER)Myopia
Difficulty accommodating* due to the crystalline lens becoming less elastic. -
(ANSWER)Presbyopia
Around what wavelenght of light is thought to cause cataracts - (ANSWER)460
nm
Axis pliers are meant to do what - (ANSWER)Turn and rotate a lens
Cr39 Index and abbe - (ANSWER)Index 1.49 Abbe 59
Crown glass index and abbe - (ANSWER)Index 1.523 Abbe 60
Trivex Index and abbe - (ANSWER)Index 1.54 Abbe 43-45
Polcarbanate index and abbe - (ANSWER)Index 1.58 Abbe 30
, 2
Hight index 1.60- 1.67 index and abbe - (ANSWER)1.6 abbe 36, 1.67 abbe 32
Ultra high index 1.70- 1.7.4 index and abbe - (ANSWER)1.7 abbe 36, 1.74 abbe 33
If somone chose a pair of lenses to put in a frame for primary sports use what
orginazation would have checked the safety of the lenses - (ANSWER)ASTM
What indication on a frame or glass indicates a pair of saftey glasses -
(ANSWER)ANSI Z87.1
how thick does a lens from a pair of safety glasses have to be - (ANSWER)3 mm
thick or on a perscription higher than +3 at its thinest part needs to be 2 mm
Where is the concentric circles in a lensometer ? - (ANSWER)Within the recticle
What is a distometer used for? - (ANSWER)Measuring vertex distance between
the front of the eye and the back of the lens
What is a phoropter used for ? - (ANSWER)measures the eye's refractive error to
help determine and eye prescription
What is a poalriscope used for? - (ANSWER)it measures internal stress within lens
ABO NCLE EXAM QUESTIONS AND
ANSWERS (VERIFIED ANSWERS GRADED
A+) LATEST UPDATE 2025/2026
A condition of the eye in which light focuses in front of the retina. Caused by
either the eye being too strong or the globe of the eye being too long -
(ANSWER)Myopia
Difficulty accommodating* due to the crystalline lens becoming less elastic. -
(ANSWER)Presbyopia
Around what wavelenght of light is thought to cause cataracts - (ANSWER)460
nm
Axis pliers are meant to do what - (ANSWER)Turn and rotate a lens
Cr39 Index and abbe - (ANSWER)Index 1.49 Abbe 59
Crown glass index and abbe - (ANSWER)Index 1.523 Abbe 60
Trivex Index and abbe - (ANSWER)Index 1.54 Abbe 43-45
Polcarbanate index and abbe - (ANSWER)Index 1.58 Abbe 30
, 2
Hight index 1.60- 1.67 index and abbe - (ANSWER)1.6 abbe 36, 1.67 abbe 32
Ultra high index 1.70- 1.7.4 index and abbe - (ANSWER)1.7 abbe 36, 1.74 abbe 33
If somone chose a pair of lenses to put in a frame for primary sports use what
orginazation would have checked the safety of the lenses - (ANSWER)ASTM
What indication on a frame or glass indicates a pair of saftey glasses -
(ANSWER)ANSI Z87.1
how thick does a lens from a pair of safety glasses have to be - (ANSWER)3 mm
thick or on a perscription higher than +3 at its thinest part needs to be 2 mm
Where is the concentric circles in a lensometer ? - (ANSWER)Within the recticle
What is a distometer used for? - (ANSWER)Measuring vertex distance between
the front of the eye and the back of the lens
What is a phoropter used for ? - (ANSWER)measures the eye's refractive error to
help determine and eye prescription
What is a poalriscope used for? - (ANSWER)it measures internal stress within lens
