Optometry Final Exam Questions And
Answers
emmetropia - - -
correct answer ✅optical state of the eye in which parallel light
enters the eye and focuses on the retina without the need for any
corrective lenses or accommodation; this is the absence of
refractive error and the "normal" or ideal state of the eye
ametropia - - -
correct answer ✅refractive error, "abnormal" optical state of the
eye in which parallel light rays enter the eye and focus on an area
other than the retina; this condition requires corrective lenses to
produce clear retinal images
astigmatism - - -
correct answer ✅optical error in which refractive power is not
uniform in all meridians; light entering the eye is focused at two
distinct focal points where at least one focal point does not fall onto
the retina
How can corneal astigmatism be measured? - - -
correct answer ✅keratometry
What are components of sphere-cylinder lens RX? - - -
correct answer ✅1. Power (magnitude in D) of sphere component
,Optometry Final Exam Questions And
Answers
2. Power (magnitude of D) of cylinder component
3. Axis (orientation) of the cylinder
i.e. +2.00 -3.00 X 145
i.e. -5.00 -2.00 X 060
If one meridian is at 60 degrees, where is the other - - -
correct answer ✅150 degrees because 60+90=150
What are the possible values for magnitude of axis? - - -
correct answer ✅1 degree-180 degrees
How can one determine the powers of the 2 principal meridians? - -
-
correct answer ✅Principal meridian 1=power of more (+) meridian
Principal meridian 2=sum of sphere and cylinder componenets
Find primary and secondary meridians for this Rx.
+1.00 -2.00 X 110 - - -
correct answer ✅Principal meridian 1=+1.00D
Principal meridian 2=+1.00D + -2.00D= -1.00D
,Optometry Final Exam Questions And
Answers
Find the primary and secondary meridians for the Rx.
-3.00 -4.50 X 010 - - -
correct answer ✅Principal meridian 1= -3.00D
Principal meridian 2= -3.00D + -4.50D= -7.50D
Find the primary and secondary meridians for this Rx.
+4.00 -6.50 X 175 - - -
correct answer ✅Principal meridian 1= +4.00D
Principal meridian 2= +4.00D - 6.50D= -2.50D
What are the 8 different types of refractive error? - - -
correct answer ✅7 distance refractive errors which assume that
accommodation is at rest and that the eye is looking at a distant
target (optical infinity)
1 near refractive error that involves a target closer than optical
infinity and may involve accommodation
Define diopter - - -
correct answer ✅unit of measurement of the refractive power of
, Optometry Final Exam Questions And
Answers
the lens, and is equal to the reciprocal of the focal length as
measured in meters
What is the focal point of a +2.00D lens? - - -
correct answer ✅0.5 m or 50 cm
What is the dioptric power of a lens that has a focal point of 20 cm?
---
correct answer ✅+5.00 D
Define spherical refractive error - - -
correct answer ✅Refractive error is uniform in all meridians. No
matter where cross-section is taken, the refractive error is the same
magnitude throughout
Define hyperopia - - -
correct answer ✅parallel light entering the eye is focused behind
the retina and requires a plus lens to converge the light to properly
focus it on the retina; eye has too much minus power
Define myopia - - -
correct answer ✅parallel light entering the eye is focused in front
Answers
emmetropia - - -
correct answer ✅optical state of the eye in which parallel light
enters the eye and focuses on the retina without the need for any
corrective lenses or accommodation; this is the absence of
refractive error and the "normal" or ideal state of the eye
ametropia - - -
correct answer ✅refractive error, "abnormal" optical state of the
eye in which parallel light rays enter the eye and focus on an area
other than the retina; this condition requires corrective lenses to
produce clear retinal images
astigmatism - - -
correct answer ✅optical error in which refractive power is not
uniform in all meridians; light entering the eye is focused at two
distinct focal points where at least one focal point does not fall onto
the retina
How can corneal astigmatism be measured? - - -
correct answer ✅keratometry
What are components of sphere-cylinder lens RX? - - -
correct answer ✅1. Power (magnitude in D) of sphere component
,Optometry Final Exam Questions And
Answers
2. Power (magnitude of D) of cylinder component
3. Axis (orientation) of the cylinder
i.e. +2.00 -3.00 X 145
i.e. -5.00 -2.00 X 060
If one meridian is at 60 degrees, where is the other - - -
correct answer ✅150 degrees because 60+90=150
What are the possible values for magnitude of axis? - - -
correct answer ✅1 degree-180 degrees
How can one determine the powers of the 2 principal meridians? - -
-
correct answer ✅Principal meridian 1=power of more (+) meridian
Principal meridian 2=sum of sphere and cylinder componenets
Find primary and secondary meridians for this Rx.
+1.00 -2.00 X 110 - - -
correct answer ✅Principal meridian 1=+1.00D
Principal meridian 2=+1.00D + -2.00D= -1.00D
,Optometry Final Exam Questions And
Answers
Find the primary and secondary meridians for the Rx.
-3.00 -4.50 X 010 - - -
correct answer ✅Principal meridian 1= -3.00D
Principal meridian 2= -3.00D + -4.50D= -7.50D
Find the primary and secondary meridians for this Rx.
+4.00 -6.50 X 175 - - -
correct answer ✅Principal meridian 1= +4.00D
Principal meridian 2= +4.00D - 6.50D= -2.50D
What are the 8 different types of refractive error? - - -
correct answer ✅7 distance refractive errors which assume that
accommodation is at rest and that the eye is looking at a distant
target (optical infinity)
1 near refractive error that involves a target closer than optical
infinity and may involve accommodation
Define diopter - - -
correct answer ✅unit of measurement of the refractive power of
, Optometry Final Exam Questions And
Answers
the lens, and is equal to the reciprocal of the focal length as
measured in meters
What is the focal point of a +2.00D lens? - - -
correct answer ✅0.5 m or 50 cm
What is the dioptric power of a lens that has a focal point of 20 cm?
---
correct answer ✅+5.00 D
Define spherical refractive error - - -
correct answer ✅Refractive error is uniform in all meridians. No
matter where cross-section is taken, the refractive error is the same
magnitude throughout
Define hyperopia - - -
correct answer ✅parallel light entering the eye is focused behind
the retina and requires a plus lens to converge the light to properly
focus it on the retina; eye has too much minus power
Define myopia - - -
correct answer ✅parallel light entering the eye is focused in front
