AMERICAN OPTOMETRIC ASSOCIATION CPO
EXAM SCRIPT 2026 TEST PAPER QUESTIONS
AND SOLUTIONS GRADED A+
◉ What are additional curves on the lens that surrounds the optical
zone called? Answer: peripheral curves
◉ What is the center area of the lens that provides optical correction
for the patient's vision? Answer: optical zone
◉ What is the measurement from edge to edge of the lens at the
widest point called? Answer: overall diameter
◉ __________________ lenses are also called convex lenses. They are
thick in the center and thin on the edges. Light rays passing through
these lenses will be converged. Answer: plus
◉ __________________ lenses are thin in the center and thick on the
edges. Objects viewed through these lenses will appear smaller or
minified. Light rays passing through these lenses will be diverged.
Answer: minus
,◉ What instrument is used to verify the spectacle prescription?
Answer: lensometer
◉ When viewing a lens through the instrument above, you take the
following measurements: sphere +2.50, cylinder -1.50, axis 172.
How would the prescription be written? Answer: +2.50 -1.50 x 172
◉ All of the following statements concerning prism are true except:
Answer: light moving through a prism is bent toward the apex
◉ Which of the following terms is used to designate a lens without
power? Answer: plano
◉ Which of the following lenses has the same power in all areas of
the lens and is used to treat myopia or hyperopia? Answer: spherical
◉ Which of the following lens materials has the hardest surface and
is also the heaviest? Answer: glass
◉ Which of the following lens materials is the most shatter-
resistant? Answer: polycarbonate
◉ Which type of lens corrects vision at three distances? Answer:
trifocal
,◉ The part of the frame that surrounds each lens, holding the lens in
place within the frame, is the: Answer: eyewire
◉ The part of the frame that extends from the frame front, back
alongside the head, and over the ear of the wearer is the: Answer:
temple
◉ The widest horizontal dimension of the lens opening of a frame is
the: Answer: A dimension
◉ A picture representation of the pressure points between the
eyeglasses frame and the patient's head is the: Answer: fitting
triangle
◉ Which of the following tilts results when a pair of spectacles is
tilted so that the bottom of the lenses is closer to the face than the
top? Answer: pantoscopic
◉ The largest diameter through the lens is called the: Answer:
effective diameter
◉ A lens that converges parallel light is called ________________.
Answer: convex (+)
, ◉ The unit of measure for ophthalmic lenses is _____________. Answer:
diopter
◉ A lens that displaces light rather than focuses light is called
_____________. Answer: prism
◉ A _____________ lens diverges parallel light. Answer: concave (-)
◉ A lens that has one curve is called a ____________. Answer: spherical
◉ The point of a prism is called the _____________. Answer: apex
◉ A lens where one part has no power and 90 degrees away there is
power is called a _________________. Answer: pl-cylinder
◉ A lens used to treat myopia/hyperopia and astigmatism is called a
___________. Answer: sph/cylindrical
◉ The middle value of the lens prescription is called the
_______________. Answer: cylindrical
EXAM SCRIPT 2026 TEST PAPER QUESTIONS
AND SOLUTIONS GRADED A+
◉ What are additional curves on the lens that surrounds the optical
zone called? Answer: peripheral curves
◉ What is the center area of the lens that provides optical correction
for the patient's vision? Answer: optical zone
◉ What is the measurement from edge to edge of the lens at the
widest point called? Answer: overall diameter
◉ __________________ lenses are also called convex lenses. They are
thick in the center and thin on the edges. Light rays passing through
these lenses will be converged. Answer: plus
◉ __________________ lenses are thin in the center and thick on the
edges. Objects viewed through these lenses will appear smaller or
minified. Light rays passing through these lenses will be diverged.
Answer: minus
,◉ What instrument is used to verify the spectacle prescription?
Answer: lensometer
◉ When viewing a lens through the instrument above, you take the
following measurements: sphere +2.50, cylinder -1.50, axis 172.
How would the prescription be written? Answer: +2.50 -1.50 x 172
◉ All of the following statements concerning prism are true except:
Answer: light moving through a prism is bent toward the apex
◉ Which of the following terms is used to designate a lens without
power? Answer: plano
◉ Which of the following lenses has the same power in all areas of
the lens and is used to treat myopia or hyperopia? Answer: spherical
◉ Which of the following lens materials has the hardest surface and
is also the heaviest? Answer: glass
◉ Which of the following lens materials is the most shatter-
resistant? Answer: polycarbonate
◉ Which type of lens corrects vision at three distances? Answer:
trifocal
,◉ The part of the frame that surrounds each lens, holding the lens in
place within the frame, is the: Answer: eyewire
◉ The part of the frame that extends from the frame front, back
alongside the head, and over the ear of the wearer is the: Answer:
temple
◉ The widest horizontal dimension of the lens opening of a frame is
the: Answer: A dimension
◉ A picture representation of the pressure points between the
eyeglasses frame and the patient's head is the: Answer: fitting
triangle
◉ Which of the following tilts results when a pair of spectacles is
tilted so that the bottom of the lenses is closer to the face than the
top? Answer: pantoscopic
◉ The largest diameter through the lens is called the: Answer:
effective diameter
◉ A lens that converges parallel light is called ________________.
Answer: convex (+)
, ◉ The unit of measure for ophthalmic lenses is _____________. Answer:
diopter
◉ A lens that displaces light rather than focuses light is called
_____________. Answer: prism
◉ A _____________ lens diverges parallel light. Answer: concave (-)
◉ A lens that has one curve is called a ____________. Answer: spherical
◉ The point of a prism is called the _____________. Answer: apex
◉ A lens where one part has no power and 90 degrees away there is
power is called a _________________. Answer: pl-cylinder
◉ A lens used to treat myopia/hyperopia and astigmatism is called a
___________. Answer: sph/cylindrical
◉ The middle value of the lens prescription is called the
_______________. Answer: cylindrical
