NOCE Practice test, Questions AND Correct Answers
-0.50 - ✔✔What is the spherical equivalent of the following prescription: -2.25
+3.50 x171?
a. -0.50
b. -2.25
c. +0.50
d. +1.25
-1.00 +2.75 x063 - ✔✔a prescription if +1.75 -2.75 x153 would be written in
what way by an ophthalmologist?
a. +4.00 +2.75 x063
b. -1.00 +2.75 x063
c. -1.00 +2.75 x153
d. -2.75 +1.75 x153
+/- 0.13D - ✔✔What is the established tolerance for sphere power error in a -
6.00 lens?
a. +/- 0.15D
b. +/-2%
c. +/-0.33D
d. +/-0.13D
+0.50 -1.75 x020 - ✔✔A prescription is written as follows: OD -1.25 +1.75 x110.
What transposed prescription would be written on the lab order?
a. -3.00 -1.75 x110
,b. +0.50 -1.75 x110
c. Plano +1/75 x030
d. +0.50 -1.75 x020
+11.23 - ✔✔A patient is refracted at 13mm with a prescription of +12.00 OU,
but it is found that the frame she selected will hold the lenses at a distance of
18 mm from her eyes. What prescription should the optician order to
compensate for this discrepancy?
a. +12.77
b. +13.25
c. +10.77
d. +11.23
+2.50 - ✔✔What is the dioptric power of a lens with focal length of 400mm?
a. +2.50
b. -2.50
c. +4.00
d. +0.25
+3.00 -2.50 x101 - ✔✔If a patient insits on glasses for "near-vison only", which
would be the correct transposed numbers to order the following OU
prescription: -0.75 +2.50 x011 add +1.25?
a. +1.75 -2.50 x101
b. +3.00 -2.50 x101
c. +0.50 +2.50 x101
d. +3,00 +2.50 x011
,+4.25 - ✔✔Given the prescription +2.50 -3.00 x086, and standard-fit frame,
what ideal base curvature would the optician select when placing the lab order?
a. +5.25
b. +7.25
c. +6.25
d. +4.25
1.2 diopters - ✔✔a +4.00 lens intended to be positioned at PD of 30 mm was
actually manufactured at 33 m. What is the amount of prism induced by this
error?
a. 12 diopters
b. 0.75 diopters
c. 1.33 diopters
d. 1.2 diopters
1.58 - ✔✔What is the average refraction index of a polycarbonate lens?
a. 1.56
b. 1.60
c. 1.58
d. 1.67
1/3 diopter as measured at the left lens - ✔✔What amount of unwanted
vertical prism error is acceptable in the finished eyewear for a patient wearing a
Rx of OD -4.25 -0.75 x173, OS -4.50 SPH?
a. 1/3 diopter as measured at the left lens
, b. 2 mm as measured at the left lens
c. 2/3 diopter as measured at the left lens
d. 1/3 diopter as measured at the right lens
2.5 mm - ✔✔What amount of horizontal prism error is acceptable in a pair of
competed eyewear, given the following prescription: OD -3.50 -0.75 x015, OS -
4.00 Sph?
a. 0.67D
b. 2.5 mm
c. 0.33D
d. 1.0 mm
290 nanometers to 320 nanometers - ✔✔What range of UV light is typically
responsible for sunburns?
a. 10 nanometers to 100 nanometers
b. 320 nanometers to 400 nanometers
c. 100 nanometers to 290 nanometers
d. 290 nanometers to 320 nanometers
5.33 temporally - ✔✔What amount of decantation, and in which direction, will
induce 2 diopters of base-in prism for a -3.75 lens?
a. 0.53 nasally
b. 1.87 mm temporally
c. 5.33 mm nasally
d. 5.33 temporally
-0.50 - ✔✔What is the spherical equivalent of the following prescription: -2.25
+3.50 x171?
a. -0.50
b. -2.25
c. +0.50
d. +1.25
-1.00 +2.75 x063 - ✔✔a prescription if +1.75 -2.75 x153 would be written in
what way by an ophthalmologist?
a. +4.00 +2.75 x063
b. -1.00 +2.75 x063
c. -1.00 +2.75 x153
d. -2.75 +1.75 x153
+/- 0.13D - ✔✔What is the established tolerance for sphere power error in a -
6.00 lens?
a. +/- 0.15D
b. +/-2%
c. +/-0.33D
d. +/-0.13D
+0.50 -1.75 x020 - ✔✔A prescription is written as follows: OD -1.25 +1.75 x110.
What transposed prescription would be written on the lab order?
a. -3.00 -1.75 x110
,b. +0.50 -1.75 x110
c. Plano +1/75 x030
d. +0.50 -1.75 x020
+11.23 - ✔✔A patient is refracted at 13mm with a prescription of +12.00 OU,
but it is found that the frame she selected will hold the lenses at a distance of
18 mm from her eyes. What prescription should the optician order to
compensate for this discrepancy?
a. +12.77
b. +13.25
c. +10.77
d. +11.23
+2.50 - ✔✔What is the dioptric power of a lens with focal length of 400mm?
a. +2.50
b. -2.50
c. +4.00
d. +0.25
+3.00 -2.50 x101 - ✔✔If a patient insits on glasses for "near-vison only", which
would be the correct transposed numbers to order the following OU
prescription: -0.75 +2.50 x011 add +1.25?
a. +1.75 -2.50 x101
b. +3.00 -2.50 x101
c. +0.50 +2.50 x101
d. +3,00 +2.50 x011
,+4.25 - ✔✔Given the prescription +2.50 -3.00 x086, and standard-fit frame,
what ideal base curvature would the optician select when placing the lab order?
a. +5.25
b. +7.25
c. +6.25
d. +4.25
1.2 diopters - ✔✔a +4.00 lens intended to be positioned at PD of 30 mm was
actually manufactured at 33 m. What is the amount of prism induced by this
error?
a. 12 diopters
b. 0.75 diopters
c. 1.33 diopters
d. 1.2 diopters
1.58 - ✔✔What is the average refraction index of a polycarbonate lens?
a. 1.56
b. 1.60
c. 1.58
d. 1.67
1/3 diopter as measured at the left lens - ✔✔What amount of unwanted
vertical prism error is acceptable in the finished eyewear for a patient wearing a
Rx of OD -4.25 -0.75 x173, OS -4.50 SPH?
a. 1/3 diopter as measured at the left lens
, b. 2 mm as measured at the left lens
c. 2/3 diopter as measured at the left lens
d. 1/3 diopter as measured at the right lens
2.5 mm - ✔✔What amount of horizontal prism error is acceptable in a pair of
competed eyewear, given the following prescription: OD -3.50 -0.75 x015, OS -
4.00 Sph?
a. 0.67D
b. 2.5 mm
c. 0.33D
d. 1.0 mm
290 nanometers to 320 nanometers - ✔✔What range of UV light is typically
responsible for sunburns?
a. 10 nanometers to 100 nanometers
b. 320 nanometers to 400 nanometers
c. 100 nanometers to 290 nanometers
d. 290 nanometers to 320 nanometers
5.33 temporally - ✔✔What amount of decantation, and in which direction, will
induce 2 diopters of base-in prism for a -3.75 lens?
a. 0.53 nasally
b. 1.87 mm temporally
c. 5.33 mm nasally
d. 5.33 temporally
