WorksheetsTypes of Lenses Pop Quiz ( VT 2 of 4 Spring '25)
Total questions: 22
Worksheet time: 11mins
Name
Class
Date
1.
The characteristics of a plus lens are:
a)
Thick center, thin edge, and magnification
b)
Thick center, thick edge, and magnification
c)
Thin center, thick edge, and magnification
d)
Thin center, thin edge, and with motion
2.
One of the ways of identifying a lens with minus power is to look for:
a)
Parallel rays of light coming to a point of focuse behind the ophthalmic lens
b)
Lens thicker in the center than the edge
c)
Objects seen through the lens are brighter
d)
Objects seen through the lens seem to move in the same direction as the lens is moving
3.
Plus lenses can be characterized by the following two attributes:
a)
Diverging and with motion
b)
Converging and against motion
c)
Converging and with motion
d)
Diverging and against motion
4.
Minus lenses can be characterized by the following two attributes:
a)
Real Image and Diverging
b)
Virtual Image and Diverging
c)
Real Image and Converging
d)
Virtual Image and Converging
5.
Simple Myopia can be corrected with
a)
Prisms
b)
Plus Spherical Lens
c)
Minus Spherical Lens
d)
Cylinder Lens
6.
An eye that requires a different correction in different merdians can be corrected with
a)
Prisms
b)
Plus Spherical Lens
c)
Minus Spherical Lens
d)
Cylinder Lens
7.
Which Refractive Error does a cylindrical lens correct for?
a)
Myopia
b)
Hyperopia
c)
Astigmatism
d)
Both A and C
8.
Which of the following structures is described as a circular opening that regulates the amount of light entering the eye
a)
Iris
b)
Crystalline Lens
c)
Cornea
d)
Pupil
9.
Using Flat Transposition to evaluate the type of Astigmatism, identity the type of Astigmatism of the following Rx:
-1.75 +0.50 x065
a)
Mixed Astigmatism
b)
Compound Myopic Astigmatism
c)
Compound Hyperopic Astigmatism
d)
Simple Myopic Astigmatism
e)
Simple Hyperopic Astigmatism
10.
Using Flat Transposition to evaluate the type of Astigmatism, identity the type of Astigmatism of the following Rx:
+2.25 - 3.50 x115
a)
Mixed Astigmatism
b)
Compound Myopic Astigmatism
c)
Compound Hyperopic Astigmatism
d)
Simple Myopic Astigmatism
e)
Simple Hyperopic Astigmatism
11.
Accommodation is defined as _____________
a)
Light rays entering the eye
b)
The act of the Crystalline lens changing it's shapre to focus for objects at varying distances
c)
The refractive power of the Cornea
d)
Reductions of visual acuity with no apparent cause
12.
Which of the following ophthalmic terms is used to describe the absence of a refractive error
a)
Hypermetropia
b)
Emmetropia
c)
Ametropia
d)
None of the above
13.
A Refractive Error in which the Crystalline lens loses it's ability to focus on near objects due to the natural aging process
a)
Catract
b)
Astigmatism
c)
Strabismus
d)
Presbyopia
14.
Astigmatism means that the patient’s cornea is _____.
a)
Clear
b)
Cloudy
c)
Round
d)
Misshapened
15.
A prescription of Plano +2.00 x060 corrects:
a)
Compound Myopic Astigmatism
b)
Simple Hyperopic Astigmatism
c)
Simple Myopic Astigmatism
d)
Compound Hyperopic Astigmatism
16.
What type of lens corrects for Hyperopia?
a)
Minus
b)
Cylinder
c)
Plus
17.
Spherocylinder (compound) ophthalmic lenses usually have
a)
Spherical surfaces only
b)
Cylindrical surfaces only
c)
One cylinder surface and one spherical surface
d)
All of the above
18.
In a diverging lens, a _____ image is formed
a)
Real
b)
Virtual
19.
When transposing a prescription, you never change the:
a)
Spherical power
b)
Cylinder power
c)
Axis
d)
Add power
20.
To transpose a prescription means to:
a)
Change the axis
b)
Divide the sphere power and add it to the cylinder power
c)
Change the sign of the cylinder power without technically rewriting the lens prescription
d)
Making a more correct prescription for the patient
21.
The correct process in which light enters the eye
a)
Cornea - Pupil - Crystalline lens Viterous humor - Retina - Optic nerve
b)
Cornea - Iris - Crystalline lens - Vitreous humor - Retina - Optic nerve
c)
Cornea - Pupil - Crystalline lens - Ciliary body - Viterous humor - Retina - Optic nerve
d)
Pupil - Iris - Crystalline lens - Ciliary body - Retina - Optic nerve
22.
The sphere is the :
a)
Location of the cylinder
b)
Magnifiying power of the lens
c)
The base power of the lens
d)
Secondary power that helps to correct Astigmatism
100 %
