Question 1

In the following lens prescription, which number represents the spherical power: +1.00 +0.50 x 70

Accepted Answer

A) 1)00 
B) 0)50 
C) 70 
D) The spherical power is not part of the lens prescription 
A) 1)00 
B) 0)50 
C) 70 
D) The spherical power is not part of the lens prescription A

Question 2

A lens made up of sphere power and cylinder power is known as a

Accepted Answer

A) spherocylindrical lens. 
B) cylindrospherical lens. 
C) cross cylinder. 
D) progressive lens. 
A) spherocylindrical lens. 
B) cylindrospherical lens. 
C) cross cylinder. 
D) progressive lens. A

Question 3

Convex lenses have what type of dioptric value?

Accepted Answer

A) Positive 
B) Negative 
C) Neutral 
D) None of the above 
A) Positive 
B) Negative 
C) Neutral 
D) None of the above A

Question 4

What is the recommended height of a bifocal segment?

Accepted Answer

A) 6 mm above the lower lid margin 
B) At the lower lid margin 
C) 4 mm above the lower lid margin 
D) 4 mm below the lower lid margin 
A) 6 mm above the lower lid margin 
B) At the lower lid margin 
C) 4 mm above the lower lid margin 
D) 4 mm below the lower lid margin

Question 5

What does it mean when the mires cannot be centered in the lensometer?

Accepted Answer

A) The stage must be move up 
B) The stage must be moved down 
C) The lens prism has been ground into the lens 
D) The power dial needs to be rotated 
A) The stage must be move up 
B) The stage must be moved down 
C) The lens prism has been ground into the lens 
D) The power dial needs to be rotated

Question 6

The majority of glasses dispensed are made out of what material?

Accepted Answer

A) Glass 
B) Plastic 
C) Polycarbonate 
D) Vinyl 
A) Glass 
B) Plastic 
C) Polycarbonate 
D) Vinyl

Question 7

Transpose the following spherocylindrical minus prescription: +2.00 -1.00 x 180

Accepted Answer

A) +1.00 -2.00 x 90 
B) +2.00 -3.00 x 180 
C) +1.00 +1.00 x 90 
D) -1.00 - 2.00 x 90 
A) +1.00 -2.00 x 90 
B) +2.00 -3.00 x 180 
C) +1.00 +1.00 x 90 
D) -1.00 - 2.00 x 90

Question 8

During a lensometer examination, if the examiner is severely astigmatic, they should

Accepted Answer

A) wear their glasses. 
B) adjust the instrument's reticle. 
C) center the mires. 
D) stay away from the lensometer. 
A) wear their glasses. 
B) adjust the instrument's reticle. 
C) center the mires. 
D) stay away from the lensometer.

Question 9

Heat tempering glass lenses is done in order to

Accepted Answer

A) prevent impact breakage. 
B) resist tension. 
C) increase thickness of glass. 
D) polarize light. 
A) prevent impact breakage. 
B) resist tension. 
C) increase thickness of glass. 
D) polarize light.

Question 10

Which is a handheld instrument that measures the surface power of a spectacle lens in diopters?

Accepted Answer

A) Keratometer 
B) Lensometer 
C) Geneva Lens Clock 
D) Tonometer 
A) Keratometer 
B) Lensometer 
C) Geneva Lens Clock 
D) Tonometer

Question 11

Unintentional induced prism can cause which of the following?

Accepted Answer

A) Weak lenses 
B) Eye strain 
C) Conjunctivitis 
D) Myopia 
A) Weak lenses 
B) Eye strain 
C) Conjunctivitis 
D) Myopia

Question 12

What type of lenses darken when outdoors and lighten when indoors?

Accepted Answer

A) Polarized lenses 
B) Photochromic lenses 
C) Tinted lenses 
D) Antireflective lenses 
A) Polarized lenses 
B) Photochromic lenses 
C) Tinted lenses 
D) Antireflective lenses

Question 13

What type of lenses reduce glare?

Accepted Answer

A) Polarized lenses 
B) Scratch-resistant lenses 
C) Photochromic lenses 
D) UV-protection lenses 
A) Polarized lenses 
B) Scratch-resistant lenses 
C) Photochromic lenses 
D) UV-protection lenses

Question 14

What would be the spherical equivalent of a (-2.00 + 2.00x90) lens?

Accepted Answer

A) -3.00 
B) -1.00 
C) +1.00 
D) -2.00 
A) -3.00 
B) -1.00 
C) +1.00 
D) -2.00

Question 15

How might transposition of an eyeglass prescription be used?

Accepted Answer

A) To find the refractive index 
B) To find the focal length of a lens 
C) To determine a patient's refraction 
D) To convert a minus cylinder power to a plus cylinder power 
A) To find the refractive index 
B) To find the focal length of a lens 
C) To determine a patient's refraction 
D) To convert a minus cylinder power to a plus cylinder power

Question 16

The amount of induced prism and the direction of the prism are determined by

Accepted Answer

A) the position of the eyes. 
B) the prescription. 
C) the position of the nose. 
D) A and B. 
A) the position of the eyes. 
B) the prescription. 
C) the position of the nose. 
D) A and B.

Question 17

Which of the following is a unit of measurement for the optical power of a lens?

Accepted Answer

A) Cylinder (cyl) 
B) Sphere (sph) 
C) Diopter 
D) Axis 
A) Cylinder (cyl) 
B) Sphere (sph) 
C) Diopter 
D) Axis

Question 18

What is the spherical equivalent of the following prescription: +2.00 +2.00 x 60

Accepted Answer

A) +2.00 
B) -2.00 
C) +3.00 
D) -2.50 
A) +2.00 
B) -2.00 
C) +3.00 
D) -2.50

Question 19

The vertical angle that the frame front makes to the face when glasses are worn is known as

Accepted Answer

A) vertex distance. 
B) brow tilt. 
C) base curve. 
D) pantoscopic angle. 
A) vertex distance. 
B) brow tilt. 
C) base curve. 
D) pantoscopic angle.

Question 20

What is used to measure the vertex distance of a pair of eyeglasses?

Accepted Answer

A) Caliper 
B) Geneva lens gauge 
C) A small millimeter ruler 
D) An index card 
A) Caliper 
B) Geneva lens gauge 
C) A small millimeter ruler 
D) An index card

In the following lens prescription, which number represents the spherical power: +1.00 +0.50 x 70

A lens made up of sphere power and cylinder power is known as a

Convex lenses have what type of dioptric value?

What is the recommended height of a bifocal segment?

What does it mean when the mires cannot be centered in the lensometer?

The majority of glasses dispensed are made out of what material?

Transpose the following spherocylindrical minus prescription: +2.00 -1.00 x 180

During a lensometer examination, if the examiner is severely astigmatic, they should

Heat tempering glass lenses is done in order to

Which is a handheld instrument that measures the surface power of a spectacle lens in diopters?

Unintentional induced prism can cause which of the following?

What type of lenses darken when outdoors and lighten when indoors?

What type of lenses reduce glare?

What would be the spherical equivalent of a (-2.00 + 2.00x90) lens?

How might transposition of an eyeglass prescription be used?

The amount of induced prism and the direction of the prism are determined by

Which of the following is a unit of measurement for the optical power of a lens?

What is the spherical equivalent of the following prescription: +2.00 +2.00 x 60

The vertical angle that the frame front makes to the face when glasses are worn is known as

What is used to measure the vertex distance of a pair of eyeglasses?

Assisting in Surgery

Contact Lenses

Ethical and Legal Issues

History Taking

Keratometry Tonometry and Refractometry

Medical Equipment

Ocular Motility and Visual Fields

Ophthalmic Imaging

Patient Services and Education

Pharmacology

Pupillary Assessment

Safety Precautions

Supplemental Skills

Visual Assessment

Opthalmological Coding Certification

Filters

Exam 6: Lensometry and Spectacle Skills

In the following lens prescription, which number represents the spherical power: +1.00 +0.50 x 70

A lens made up of sphere power and cylinder power is known as a

Convex lenses have what type of dioptric value?

What is the recommended height of a bifocal segment?

What does it mean when the mires cannot be centered in the lensometer?

The majority of glasses dispensed are made out of what material?

Transpose the following spherocylindrical minus prescription: +2.00 -1.00 x 180

During a lensometer examination, if the examiner is severely astigmatic, they should

Heat tempering glass lenses is done in order to

Which is a handheld instrument that measures the surface power of a spectacle lens in diopters?

Unintentional induced prism can cause which of the following?

What type of lenses darken when outdoors and lighten when indoors?

What type of lenses reduce glare?

What would be the spherical equivalent of a (-2.00 + 2.00x90) lens?

How might transposition of an eyeglass prescription be used?

The amount of induced prism and the direction of the prism are determined by

Which of the following is a unit of measurement for the optical power of a lens?

What is the spherical equivalent of the following prescription: +2.00 +2.00 x 60

The vertical angle that the frame front makes to the face when glasses are worn is known as

What is used to measure the vertex distance of a pair of eyeglasses?

Assisting in Surgery

Contact Lenses

Ethical and Legal Issues

History Taking

Keratometry Tonometry and Refractometry

Medical Equipment

Ocular Motility and Visual Fields

Ophthalmic Imaging

Patient Services and Education

Pharmacology

Pupillary Assessment

Safety Precautions

Supplemental Skills

Visual Assessment

Opthalmological Coding Certification

Filters