Virginia Optician Practical Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which instrument is primarily used to measure the focusing power of a
spectacle lens in an optical laboratory?
A. Pupillometer
B. Lensometer
C. Keratometer
D. Ophthalmoscope
Correct Answer: B. Lensometer. A lensometer is specifically designed
to verify the prescription power, axis, and prism of spectacle lenses
with high accuracy, making it essential in optician practice.
2. When measuring monocular pupillary distance (PD), what is the
primary purpose of dividing the measurement?
A. To determine lens thickness
B. To locate optical centers for each eye
C. To calculate frame size
, D. To measure vertex distance
Correct Answer: B. To locate optical centers for each eye. Monocular
PD ensures each lens is properly centered over each pupil to reduce
visual strain and improve optical accuracy.
3. What is the standard unit used to express lens power?
A. Millimeters
B. Diopters
C. Degrees
D. Nanometers
Correct Answer: B. Diopters. Lens power is measured in diopters,
which represent the reciprocal of focal length in meters and define
refractive strength.
4. Which lens type is used to correct myopia?
A. Convex lens
B. Bifocal lens
C. Concave lens
D. Cylindrical lens
Correct Answer: C. Concave lens. A concave lens diverges light rays,
allowing them to focus correctly on the retina in myopic patients.
5. What is the purpose of a bevel on a spectacle lens edge?
A. Increase lens weight
B. Improve optical clarity
C. Secure lens in the frame groove
, D. Change refractive index
Correct Answer: C. Secure lens in the frame groove. A bevel ensures
the lens fits firmly within the frame rim without slipping or loosening.
6. Which condition is corrected using a cylindrical lens?
A. Astigmatism
B. Hyperopia
C. Presbyopia
D. Cataract
Correct Answer: A. Astigmatism. Cylindrical lenses compensate for
uneven corneal curvature by focusing light in a single meridian.
7. What is the main function of anti-reflective coating?
A. Increase lens weight
B. Reduce glare and reflections
C. Change lens color
D. Strengthen frame material
Correct Answer: B. Reduce glare and reflections. Anti-reflective
coating enhances visual clarity by minimizing surface reflections.
8. Which instrument is used to measure corneal curvature?
A. Retinoscope
B. Keratometer
C. Phoropter
D. Tonometer
Correct Answer: B. Keratometer. A keratometer measures the
, curvature of the cornea to help determine astigmatism and contact
lens fitting parameters.
9. What does vertex distance refer to?
A. Distance between pupils
B. Distance from lens to cornea
C. Frame width
D. Lens thickness
Correct Answer: B. Distance from lens to cornea. Vertex distance
affects effective lens power, especially in high prescriptions.
10. Which part of the frame rests on the nose?
A. Temple
B. Bridge
C. Rim
D. Hinge
Correct Answer: B. Bridge. The bridge supports the frame on the nose
and helps distribute weight evenly.
11. What is the primary purpose of a safety bevel?
A. Increase lens curvature
B. Prevent lens edge chipping
C. Improve magnification
D. Change lens tint
Correct Answer: B. Prevent lens edge chipping. A safety bevel reduces
stress concentration at the lens edge during fitting.
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which instrument is primarily used to measure the focusing power of a
spectacle lens in an optical laboratory?
A. Pupillometer
B. Lensometer
C. Keratometer
D. Ophthalmoscope
Correct Answer: B. Lensometer. A lensometer is specifically designed
to verify the prescription power, axis, and prism of spectacle lenses
with high accuracy, making it essential in optician practice.
2. When measuring monocular pupillary distance (PD), what is the
primary purpose of dividing the measurement?
A. To determine lens thickness
B. To locate optical centers for each eye
C. To calculate frame size
, D. To measure vertex distance
Correct Answer: B. To locate optical centers for each eye. Monocular
PD ensures each lens is properly centered over each pupil to reduce
visual strain and improve optical accuracy.
3. What is the standard unit used to express lens power?
A. Millimeters
B. Diopters
C. Degrees
D. Nanometers
Correct Answer: B. Diopters. Lens power is measured in diopters,
which represent the reciprocal of focal length in meters and define
refractive strength.
4. Which lens type is used to correct myopia?
A. Convex lens
B. Bifocal lens
C. Concave lens
D. Cylindrical lens
Correct Answer: C. Concave lens. A concave lens diverges light rays,
allowing them to focus correctly on the retina in myopic patients.
5. What is the purpose of a bevel on a spectacle lens edge?
A. Increase lens weight
B. Improve optical clarity
C. Secure lens in the frame groove
, D. Change refractive index
Correct Answer: C. Secure lens in the frame groove. A bevel ensures
the lens fits firmly within the frame rim without slipping or loosening.
6. Which condition is corrected using a cylindrical lens?
A. Astigmatism
B. Hyperopia
C. Presbyopia
D. Cataract
Correct Answer: A. Astigmatism. Cylindrical lenses compensate for
uneven corneal curvature by focusing light in a single meridian.
7. What is the main function of anti-reflective coating?
A. Increase lens weight
B. Reduce glare and reflections
C. Change lens color
D. Strengthen frame material
Correct Answer: B. Reduce glare and reflections. Anti-reflective
coating enhances visual clarity by minimizing surface reflections.
8. Which instrument is used to measure corneal curvature?
A. Retinoscope
B. Keratometer
C. Phoropter
D. Tonometer
Correct Answer: B. Keratometer. A keratometer measures the
, curvature of the cornea to help determine astigmatism and contact
lens fitting parameters.
9. What does vertex distance refer to?
A. Distance between pupils
B. Distance from lens to cornea
C. Frame width
D. Lens thickness
Correct Answer: B. Distance from lens to cornea. Vertex distance
affects effective lens power, especially in high prescriptions.
10. Which part of the frame rests on the nose?
A. Temple
B. Bridge
C. Rim
D. Hinge
Correct Answer: B. Bridge. The bridge supports the frame on the nose
and helps distribute weight evenly.
11. What is the primary purpose of a safety bevel?
A. Increase lens curvature
B. Prevent lens edge chipping
C. Improve magnification
D. Change lens tint
Correct Answer: B. Prevent lens edge chipping. A safety bevel reduces
stress concentration at the lens edge during fitting.
