PRACTICE EXAM QUESTIONS 400 QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100% CORRECT)
/ALREADY GRADED A+
Which of the following medications may affect successful contact lens wear?
Antacids
Antihistamines
Asprin
Laxatives - ANSWER: Antihistamines
Which term refers to sensitivity to light?
Presbyopia
Pannus
Ptosis
Photophobia - ANSWER: Photophobia
This is an example of what type of astigmatism: K's 42.50@ .50@90
With the rule
Lenticular
Against the rule
Irregular - ANSWER: Against the rule
The cornea receives nutrients from:
1. Aqueous humor
2. Tears
3. Kimball blood vessels
4. Orbicularis occuli - ANSWER: 1,2,&3
The increased loss of ability of crystalline lens accommodate is called:
Presbyopia
Myopia
Hyperopia
Aphakia - ANSWER: Presbyopia
Which instrument can provide simultaneous information about the cornea, lids,
conjunctiva, lashes, contact lens surface and fit
Radiuscope
Corneoscope
, Slit lamp
Keratometer - ANSWER: Slit lamp
K reading - ANSWER: Anterior corneal curvature measurements obtained using
keratometer
Lacrimal lens - ANSWER: The lens that is formed by the tears that collect between
the base curve of a contact lens and the anterior cornea.
Plus lacrimal lens - ANSWER: Steeper BC than "k" results in..
Minus lacrimal lens - ANSWER: Results from BC being flatter than "k"
Corneal astigmatism - ANSWER: All astigmatism found in the curvature of the cornea
as determined by the k readings
What is the corneal astigmatism?
"K" readings= 45.00D @.00 @ 90 - ANSWER: 2.00D of corneal astigmatism
With the rule astigmatism - ANSWER: the vertical corneal meridian has the steepest
curvature
What is the type of astigmatism?
"K" readings= 46.00D @.25D @ 90 - ANSWER: With the rule astigmatism.
Against the rule astigmatism - ANSWER: the horizontal meridian (2nd k reading) has
the steepest curvature
What is the type of astigmatism?
"K" readings= 46.00D @.25D @ 90 - ANSWER: Against the rule
Residual astigmatism - ANSWER: Astigmatism discovered during the refraction that is
not located on the cornea. May also be known as lenticular astigmatism
What is the type of astigmatism?
Spec Rx: 2.50 -1.75 x 165
"K" readings= 43.00D @.00D @ 90 - ANSWER: Residual. Cyl does not match
the difference in k readings
Apical clearance philosophy (central cornea) - ANSWER: Fitting technique where the
lens is designed w posterior lens curve. (BC) steeper than flattest corneal meridian.
Used with "against the rule" astigmatism
Corneal alignment philosophy (lid attachment) - ANSWER: This fitting technique lens
is designed w BC flatter than meridian. Used with "with the rule" astigmatism