Optician Practical UPDATED Exam
Questions and CORRECT Answers only
a lens focal length may be altered by? - CORRECT Answer- changing the curvature of one
surface
what controls the amount of light that enters the eye? - CORRECT Answer- Iris
lights changing direction as it passes from one medium to another is called what? -
CORRECT Answer- refraction
meniscus, equiconcave and flat concave are all, what? - CORRECT Answer- minus lenses
what term is used to describe the eyes tendency to TURN from its normal position? -
CORRECT Answer- phoria
refractive condition where light focuses directly ON the retina...? - CORRECT Answer-
emmetriopia
one convex and one concave surface is known as... - CORRECT Answer- a meniscus lens
best lens treatment to reduce water and road glare? - CORRECT Answer- polarized
establishes commercial and industry standards.. - CORRECT Answer- ANSI
hard resin used in plastic - CORRECT Answer- cr39
multifocals are measured to the... - CORRECT Answer- lower edge of lens not frame
corneas index of refraction - CORRECT Answer- 1.37
, lens characteristic that corrects astigmatism is called.... - CORRECT Answer- cylinder power
progressive marks are ______ mm apart - CORRECT Answer- 34 mm
what prism could help EXOtropia? - CORRECT Answer- base in prism
what prism could help ESOtropia? - CORRECT Answer- base out prism
what happens if you move a PLUS lens CLOSER to the eye? - CORRECT Answer- loses
perceived power
what happens if you move a PLUS lens AWAY from the eye? - CORRECT Answer- gains
perceived power
what happens if you move a MINUS lens CLOSER to the eye? - CORRECT Answer- gains
perceived power
what happens if you move a MINUS lens AWAY from the eye? - CORRECT Answer- loses
perceived power
Vertical prism U&U and D&D cancel out, but U&D you ____ - CORRECT Answer- ADD U
and D
horizontal prism O&O add, I&I add, But I&O____ - CORRECT Answer- Cancel ea other
I&O
TP @ 90 first column is? - CORRECT Answer- 0,30,45,60,90
light travels at.... - CORRECT Answer- 186,000 mps
both sides of lens is minus? - CORRECT Answer- biconcave
Questions and CORRECT Answers only
a lens focal length may be altered by? - CORRECT Answer- changing the curvature of one
surface
what controls the amount of light that enters the eye? - CORRECT Answer- Iris
lights changing direction as it passes from one medium to another is called what? -
CORRECT Answer- refraction
meniscus, equiconcave and flat concave are all, what? - CORRECT Answer- minus lenses
what term is used to describe the eyes tendency to TURN from its normal position? -
CORRECT Answer- phoria
refractive condition where light focuses directly ON the retina...? - CORRECT Answer-
emmetriopia
one convex and one concave surface is known as... - CORRECT Answer- a meniscus lens
best lens treatment to reduce water and road glare? - CORRECT Answer- polarized
establishes commercial and industry standards.. - CORRECT Answer- ANSI
hard resin used in plastic - CORRECT Answer- cr39
multifocals are measured to the... - CORRECT Answer- lower edge of lens not frame
corneas index of refraction - CORRECT Answer- 1.37
, lens characteristic that corrects astigmatism is called.... - CORRECT Answer- cylinder power
progressive marks are ______ mm apart - CORRECT Answer- 34 mm
what prism could help EXOtropia? - CORRECT Answer- base in prism
what prism could help ESOtropia? - CORRECT Answer- base out prism
what happens if you move a PLUS lens CLOSER to the eye? - CORRECT Answer- loses
perceived power
what happens if you move a PLUS lens AWAY from the eye? - CORRECT Answer- gains
perceived power
what happens if you move a MINUS lens CLOSER to the eye? - CORRECT Answer- gains
perceived power
what happens if you move a MINUS lens AWAY from the eye? - CORRECT Answer- loses
perceived power
Vertical prism U&U and D&D cancel out, but U&D you ____ - CORRECT Answer- ADD U
and D
horizontal prism O&O add, I&I add, But I&O____ - CORRECT Answer- Cancel ea other
I&O
TP @ 90 first column is? - CORRECT Answer- 0,30,45,60,90
light travels at.... - CORRECT Answer- 186,000 mps
both sides of lens is minus? - CORRECT Answer- biconcave
