ODP: Optical Final Exam | Questions and Answers
Why would an optician split prism? ** Answ** To achieve a more balanced appearance.
The front curve of a lens is +7.00, the back curves of this lens are -3.00 and -4.00. What are the
true powers? ** Answ** +4.00 and +3.00
What is the relationship between diopter and focal length? ** Answ** When one increases,
the other decreases.
Donating to the Lion's Club is an example of: ** Answ** Waste management
A patient's PD was mistakenly noted to be 62 mm when the actual measurement is 66 mm. If the
power of the lenses are -2.00 diopters in each eye, how much prism will be induced in the
finished spectacles and in which direction is the base? ** Answ** 0.8 total BO
What is the power of a lens that has a focal length of 50 cm? ** Answ** 2.00 D
To test a lens using the drop ball test, what is commonly used? ** Answ** A 5/8-inch steel
ball
When is vertex distance compensation mandatory? ** Answ** For a spectacle lens Rx over
+/-7.00 diopters
A lens has a base curve that has a focal length of 40 inches, and an ocular curve with a focal
length of 10 inches. What is the diopter power of this lens? ** Answ** -3.00
What are the true powers of this prescription? -5.00 -0.50 x 90 ** Answ** -5.00 @ 090 and -
5.50 @ 180
An elderly lady can no longer read her favorite mystery novels with ease. What is an added value
step to take for this patient? ** Answ** Demonstrate a floor stand type of magnifier that will
allow enlarged viewing while making it easy to turn the pages.
What will surround and hold lenses in place? ** Answ** The eyewire
Using the Rule of Thumb corrected base curve theory, what would be the base curve for a +2.00
-1.00 x 180 lens? ** Answ** +6.00
, *When measuring a frame to determine lens MBS, what is possible? ** Answ** ED could be
diagonal
How will moving a -5.00 diopter lens 10.00 mm closer to the eye affect the patient? **
Answ** The lens will be 0.50 D too strong and the patient may experience undefined
discomfort
What is shrikage? ** Answ** Inventory that is not accounted for physically, but shows up in
the inventory report
What entity regulates the use and disclosure of private health information? ** Answ**
HIPPA
This is the "B" measurement: ** Answ** Vertical measurement of box enclosing lens area
Which will have the most reflection, a lens with the index of? ** Answ** 1.71
What do the initials HEV stand for? ** Answ** High energy visable
What measurement is located at approximately 40 centimeters, or 16 to 18 inches? ** Answ**
Reading vision
What material has an index of 1.523? ** Answ** Crown glass
Give the simple definition of a bridge? ** Answ** Connects the two eye wires
Which refractive error results in part of the image in front of the retina and part behind the
retina? ** Answ** Mixed astigmatism
What should be part of the eyewear dispensing process? ** Answ** Inviting the patient back
for adjustments and repairs
DBL is mostly correctly defined as: ** Answ** Distance between lenses
What type of optical material will disperse light? ** Answ** All materials with non-parallel
sides
Define FVD: ** Answ** Fitted vertex distance
A 5 year old child has been prescribed his first eyeglasses prescription. The prescription is +5.00
OU. What is one piece of advice the optician can give to the child's parents? ** Answ** The
Why would an optician split prism? ** Answ** To achieve a more balanced appearance.
The front curve of a lens is +7.00, the back curves of this lens are -3.00 and -4.00. What are the
true powers? ** Answ** +4.00 and +3.00
What is the relationship between diopter and focal length? ** Answ** When one increases,
the other decreases.
Donating to the Lion's Club is an example of: ** Answ** Waste management
A patient's PD was mistakenly noted to be 62 mm when the actual measurement is 66 mm. If the
power of the lenses are -2.00 diopters in each eye, how much prism will be induced in the
finished spectacles and in which direction is the base? ** Answ** 0.8 total BO
What is the power of a lens that has a focal length of 50 cm? ** Answ** 2.00 D
To test a lens using the drop ball test, what is commonly used? ** Answ** A 5/8-inch steel
ball
When is vertex distance compensation mandatory? ** Answ** For a spectacle lens Rx over
+/-7.00 diopters
A lens has a base curve that has a focal length of 40 inches, and an ocular curve with a focal
length of 10 inches. What is the diopter power of this lens? ** Answ** -3.00
What are the true powers of this prescription? -5.00 -0.50 x 90 ** Answ** -5.00 @ 090 and -
5.50 @ 180
An elderly lady can no longer read her favorite mystery novels with ease. What is an added value
step to take for this patient? ** Answ** Demonstrate a floor stand type of magnifier that will
allow enlarged viewing while making it easy to turn the pages.
What will surround and hold lenses in place? ** Answ** The eyewire
Using the Rule of Thumb corrected base curve theory, what would be the base curve for a +2.00
-1.00 x 180 lens? ** Answ** +6.00
, *When measuring a frame to determine lens MBS, what is possible? ** Answ** ED could be
diagonal
How will moving a -5.00 diopter lens 10.00 mm closer to the eye affect the patient? **
Answ** The lens will be 0.50 D too strong and the patient may experience undefined
discomfort
What is shrikage? ** Answ** Inventory that is not accounted for physically, but shows up in
the inventory report
What entity regulates the use and disclosure of private health information? ** Answ**
HIPPA
This is the "B" measurement: ** Answ** Vertical measurement of box enclosing lens area
Which will have the most reflection, a lens with the index of? ** Answ** 1.71
What do the initials HEV stand for? ** Answ** High energy visable
What measurement is located at approximately 40 centimeters, or 16 to 18 inches? ** Answ**
Reading vision
What material has an index of 1.523? ** Answ** Crown glass
Give the simple definition of a bridge? ** Answ** Connects the two eye wires
Which refractive error results in part of the image in front of the retina and part behind the
retina? ** Answ** Mixed astigmatism
What should be part of the eyewear dispensing process? ** Answ** Inviting the patient back
for adjustments and repairs
DBL is mostly correctly defined as: ** Answ** Distance between lenses
What type of optical material will disperse light? ** Answ** All materials with non-parallel
sides
Define FVD: ** Answ** Fitted vertex distance
A 5 year old child has been prescribed his first eyeglasses prescription. The prescription is +5.00
OU. What is one piece of advice the optician can give to the child's parents? ** Answ** The
