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Procedures Three Final Exam Study Guide Flashcards | StudBud
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Procedures Three Final Exam Study Guide
Procedures Three Final Exam Study Guide
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1
Which of the following is true?
10x=+10D
+8 D=2x
5x=+2D
+20 D=4x
2
Needs to be incubated before results will show
Culture
Giemsa stain
Gram stain
3
The Cornea gets oxygen from the atmosphere, and Tear film
True
False
4
Which of the following patients would be the easiest contact lens fit and the patient most likely to be successful with
A 17 year old -2.00 D myope
A patient with -1.00-2.50x180 Rx
A 50 year old presbyope wanting bifocal contact lenses
A 30 yold +1.50 hyperope who wants to try color Ctl
5
Which of the following inflammatory cell types is most associated with allergic inflammation?
neutrophils
eosinophils
lymphocytes
basophils
6
Higher water content lenses provide more oxygen to the cornea in
HEMA soft lenses
PMMA lenses
Silicone hydrogels
RGPS
7
In general, the higher the water content of a soft contact lens, the greater the amount of oxygen transmission.
True
False
8
Which group is least prone to deposits?
Group 3
Group 4
Group 1
Group 5
9
Constant blurring with a toric soft lens is most likely the result of:
a lens that has stabilized off-axis
a tight fitting contact lens
a loose fitting lens
a dry lens
10
Schirmer's test is performed
in a dark room
with fluorescein
with or without anesthetic
without anesthetic
11
Which of the following may be a contraindication for rigid contact lens wear?
using medications that affect tear production
playing body contact sports
active corneal disease
All are true
12
Which is not a symptom of a patient with a hypersensitivity reaction due to contact lens solutions?
fogging of a contact len
All are symptoms
redness
tearing
13
local drying of the cornea nasally and temporally in an RGP wearer
6/9
3/6
4/6
3/9
14
To measure the vertical meridian with a manual keratometer
superimpose the circles
superimpose the minus signs
superimpose the plus signs
15
A soft CL should center well enough to cover at least________ percent of the cornea.
90
100
80
75
16
Used when cause of a condition is unknown. Allows for indentification of PMNs, lymphocytes, and epithelial cells
Culture
Giemsa stain
Gram stain
17
Which is not proper procedure for patient insertion of a soft contact lens?
look down and place lens on eye
wash, rinse, and dry hands
place concave side up on finger tip
retract lids with other fingers
18
If the horizontal corneal meridian has the steepest curvature, the astigmatism is called
against-the-rule
with-the-rule
oblique
irregular
19
Bearing is when a CL fits so flat that it is sitting on the cornea
True
False
20
The fluorescein pattern of a steep fitting rigid lens may reveal
central touch
central vaulting/apical clearance
an even fluorescein pattern
21
Which wetting angle would promote the best tear spread on a contact lens
13 degrees
11 Degrees
10 degrees
12 degrees
22
Which is not a symptoms of a patient with a hypersensitivity reaction due to contact lens solutions?
tearing
all are symptoms
fogging of a contact lens
light sensitivity
23
used to differentiate bacterial organisms into 2 groups: Gram + and Gram -
Culture
Gram stain
Giemsa stain
24
occurs in patients who over wear their CLs and causes perilimbal injection and sub-epithelial infiltrates
Corneal edema
GPC
Corneal abrasion
Contact lens related red eye
25
The average diameter of a PMMA lens is:
13 to 15 mm
9.0-9.8 mm
3.5-5.5 mm
7.5-8.8 mm
26
Which is the most common contact lens related problem?
corneal neovascularization
corneal ulcer
GPC
corneal edema
27
Contact lenses with a higher______will be easier for a patient to insert.
base curve
cyl
modulus
diameter
28
A rigid gas permeable contact lens for a keratoconus eye should be fit
1.5 D flatter than K
on flat K
from a diagnostic kit so the fluorescein pattern and fit can be viewed
3.0 D flatter than K
29
Which of the following is the most serious contact lens associated complication?
contact lens related red eye
suppurative keratitis
corneal edema
GPC
30
How can you make a tight fitting soft CL fit looser?
steepen the BC
steepen the BC and increase the diameter
flatten the BC
increase the diameter
31
A contact lens of 8.6 BC and 14.2 diam fits too tight. Which of the following would loosen the lens?
8.7 BC and 14.2 diam
8.3 BC and 14.4 diam
8.4 BC and 14.2 diam
8.7 BC and 14.4 diam
32
Placing an enhancing tint on a soft contact lens creates:
a Significant tint that changes the eye color
A tint to help you see the ctls
a light tint
none of the above
33
Can be used for determining a noninfectious inflammatory process
Gram stain
Culture
Giemsa stain
34
Acceptable movement, with blink, for a soft CL would be no less than:
2mm
1mm
.5 mm
.45
35
Which of the following is not a preservative used in solutions?
Benzalkonium chloride
hydroxymethylcellulose
chlorhexidine
Thimerasol
36
Cryotherapy is used for all of the following EXCEPT:
Neovascularization of the fundus
Proliferative diabetic retinopathy
retinal detachments
Retinoblastoma
37
A 44.50, +4.00 rigid lens design has the same effective power as 44.00 and
-4.50
+4.50
-4.25
+4.25
38
For a successful contact lens fitting appointment outcome, the most important consideration is:
The patient's motivation, expectations, and lens comfort
Getting enough sleep the day before
Having all new Equipment
Time Taking
39
Which is not usually a patient symptom of a tight fitting soft CL?
ghost images
soreness
smokey vision
excessive lens awareness
40
An over-refraction of +0.50-1.00x45 for a non-toric rigid lens indicates that there is _________ present.
myopia
no astigmatism
residual astigmatism
corneal astigmatism
41
Which Pair of soft CL fit and is given a brand of contact lenses that should be removed nightly disposed of every 2wk is
daily wear with frequent replacement
extended wear with conventional replacement
frequent replacement
flexible wear with disposable replacement
42
If a patient has a need for an astigmatic correction and they wish to wear monovision
they should have a toric lens designed as they would for a non-presbyopic
they should be fit with alternating vision bifocal contact lenses only
they should never be fit with monovision if they have astigmatism
43
All of the following are types of contact lenses EXCEPT:
RGP
Soft Ctl
PMMA
RQP
44
The Nd:YAG laser is an example of:
photochemical
photoionizing
photodynamic
photothermal
45
Soft contact lenses were introduced to the US in
1980
1859
1970
2005
46
Pt would keep the same pair of Ctl for the entire year and remove the lenses each night. What type of
replacement
Frequent replacement
Conventional replacement
Disposable wear
Daily wear
47
Which of the following represents against-the-rule astigmatism?
45.00@090 and 46.00@010
45.00@35 and 47.00@125
47.00@090 and 48.00@180
47.00@090 and 46.00@180
48
Which of the following is not true of corneal warpage?
it is typified by irregular astigmatism
it is caused either by a poor fitting CL or prolonged metabolic stress
it may cause spectacle blur
the cornea cannot return to its original shape
49
Which of the following reflects the steepest base curve of CL or steepest cornea?
45.00 D
8.3 mm
83.9 mm
47.00 D
50
From the JCAHPO CD, the markings on a soft toric contact lens always indicate
the axis of the refractive cylinder
the orientation of the CL on the eye
the CL axis
the brand of CL
51
When obtaining material for a conjunctival culture it is important to:
use sterile swab moistened with sterile saline solution
use topical anesthesia before taking the smear
avoid any discharge that is present
swab both the conjunctiva and lid margin
52
Round bacteria that appear singly, paired, clustered, or chained are
bacilli
cocci
diplo
spirochetes
53
An important difference when fitting soft and rigid lenses is that soft contact lenses are?
usually more comfortable
more susceptible to spectacle blur
closely fit to the shape of the cornea
more durable
54
Regarding Sloan reading cards, 4M print is _____ as large as 3M print.
half
3x
twice
4x
55
Which of the following best describes the shape of the cornea?
The central 5 mm is steep but aspherical and flattens towards the periphery
The central 5 mm is spherical and flattens towards the periphery
The entire cornea is spherical
The central 5 mm is spherical and then steepens towards the periphery
56
Which is true of low water content soft lenses when compared to high water content lenses?
they are a better choice for the patient with dry eyes
the water content is more than 55%
they allow more oxygen to pass through the lens
they are the least durable
57
Alternating lens design CLs should be fit:
flatter than the flat K
much steeper thank K
on K
steeper than K
58
What does CLARE stand for?
contact lens abrasion and red eye
Contact lens acute red eye
contact lens induced acute red eye
Contact lens acquired red eye
59
Put these in order from flattest/ middle/ steepest 8.6, 8.9,8.3
8.9/8.6/8.3
8.3/8.6/8.9
8.6/8.3/8.9
8.9/8.3/8.6
60
A large cornea usually requires a rigid contact lens diameter to be over_________mm.
5.4
7.5
10.0
9.5
61
Which is not proper procedure for rigid gas permeable contact lens care?
clean between fingers instead of in the palm of the hand
store in fresh soaking solution
rinse in tepid (lukewarm) water
all are proper procedures
62
For "K" readings of 44.00x180 and 42.00x90, the base curve for a contact lens fit 1D flatter than "K" would be
42.00
41.00
43.00
44.00
63
A corneal infection can be caused by a Bacteria
False
True
64
The diameter of a rigid contact lens can best be measured by
measuring magnifier
millimeter ruler
radiuscope
lensometer
65
Soft contact lenses are susceptible to deposits of
surfactants
enzymes
leukocytes
proteins
66
The most common type of color vision deficiency is:
Protan
Tritan
Deutan
67
what is the diameter of this RGP
10.00
9.00
90.00
9.50
68
fibrovascular scar caused by corneal neovascularization
pannus
GPC
Contact lens related red eye
Corneal edema
69
Treatment of GPC usually involves discontinuing CL wear for a period of time, changing contact lenses, and changing Ctl
False
True
70
Which is not proper procedure for patient removal of a soft contact lens?
wash, rinse, and dry hands
place fingertip on upper edge of lens
slide lens down to white of eye
look upward and retract lower lid
71
The correct lens for a toric soft contact lens fit is primarily determined by:
spherical equivalent
exactly matching the glasses Rx
maximizing the cylinder amount
trial and error through the use of a trial contact lens
72
Which is not true of a thin design soft CL?
they are easier to insert than standard thickness lenses
they offer greater oxygen transmission when compared to thicker lenses
they can be fit in larger diameters
they are generally more comfortable than thicker lenses
73
The distance from a flat surface to the highest point on a contact lens is termed the:
sagittal depth
Base curve
A and B
vault
74
Which Contact lens are more gas permeable?
PMMA
RGPS
Soft Ctl
75
Some toric RGP lenses are designed with a small segments of the lens edge removed to allow for stability on the eye
base down prism
prism ballast
truncation
double slab off
76
All of the following are advantages to wearing a contact lens EXCEPT:
C and D are not advantages
decreased sensitivity to glare
contact lenses increase peripheral vision
less susceptibility to eye infections
77
A thorough history for the fitting of RGPs does not include the following
contact lens history
patient's occupation
patient's expectations
patient's visual acuities
78
Conventional wear means you use a pair of contact lenses for ___________?
8 months
6 days
6 weeks
6 months to a year
79
A high water content lens contains over 45% water
True
False
80
Eighty percent of gas permeable contact lens wearers will show 3 and 9 o'clock staining
False
True
81
Our ability to see near objects is a result of, the thickening of increase in curvature of the crystalline lens
False
True
82
Which of the following is not a sign or symptoms of a corneal ulcer related to contact lens wear?
red eye
mucous discharge
chronic eye pain
acute eye pain
83
Which is not a design type for bifocal soft contact lenses?
all are design types
aspheric
simultaneous view
translating
84
A rigid contact lens should be inserted directly into
central cornea
inferior conjunctiva
inferior cornea
superior conjunctiva
85
preliminatry results in 24 hours with final results in 48 to 72 hours
Culture
Giemsa stain
Gram stain
86
Which of the following is an advantage of an RGP over a soft lens?
Difficulty achieving on-eye stability
Problems wearing on an occasional basis
Less comfortable
Better quality of vision
87
All of the following are contact lens parameters except:
K's
lens thickness
diameter
base curve
88
The peripheral zone of the cornea is ________ the central corneal zone.
much flatter than
a little flatter than
the same curvature
much steeper than
89
Rigid contact lens patients with small palpebral fissure size may do best with a __________ fit
high riding
bitoric
conventional
interpalpebral
90
Treatment for contact lens over wear syndrome typically includes
NSAIDS
switching lens brands
pilocarpine
steroids
91
A corneal may occur from a tiny particle getting under the lens.
RGP
Abrasion
Paplidema
GPC
92
A contact lens design for presbyopes that imitates spectacle bifocal lenses describes:
alternating vision bifocal lenses
monovision
flat top bifocal contact lens
simultaneous vision bifocal lenses
93
plated on a slide and fixed with a blue and red stain
Giemsa stain
Gram stain
Culture
94
Schirmer tear testing should be performed before an A-scan if a patient needs this test.
True
False
95
Cleaning of a contact lens should always include rubbing the contact lens.
False
True