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OCULAR PROSTHE > PRELIM > Flashcards

PRELIM Flashcards

1
Q

In Egypt, what eye were placed on the deceased?

A

Bronze and precious stone eyes

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2
Q

In the ancient world, the Romans decorated their statues with artificial eyes made of

A

Silver

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3
Q

A famous French surgeon who first described the use of artificial eyes to fit on eye socket

A

Ambrose Paré

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4
Q

What kind of prostheses were attractive but were expensive and not very durable

A

Enamel

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5
Q

Since World War II, what has become the preferred material for the artificial eyes in US

A

Plastic

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6
Q

The US military developed a technique of fabricating prostheses using

A

Oil pigments and plastics

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7
Q

______ could be worn at bedtime

A

Molded prosthesis

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8
Q

_______ had to be removed nightly to give the socket tissues a rest

A

Glass eye

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9
Q

A ________ were sold to those who could not afford a custom fitted glass eye

A

Stock glass eyes

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10
Q

Type of ocular devices

A

Prosthetic eye
Prosthetic shell

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11
Q

Prostheses may be required as a result of

A

Trauma
Malignancy
Developmental anomalies
Degenerative conditions

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12
Q

Providers of ocular prosthetic services

A

Optometrist
Ophthalmologist
Ocularist

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13
Q

Prostheses used when the natural eye remains

A

Thin prosthetic eye
Cosmetic shell

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14
Q

Removal of the global contents with retention of scleral wall, muscles, and cornea

A

Evisceration

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15
Q

This procedure involves removal of the entire globe

A

Enucleation

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16
Q

This procedure involves the removal of the entire orbital contents and usually occurs following severe trauma or malignancy

A

Exentration

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17
Q

Types of implants

A

Polyethylene Beren’s spheres

Bio-eyeTM hydroxyapatite ocular implant

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18
Q

Purpose of conformers

A

Aid in healing
Help enlarge the eye socket
Variety of sizes available

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19
Q

Fitting methods of prosthetic eye

A

Custom fitting
Stock fitting
Variation of standards sets

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20
Q

Advantage of custom fitting prostheses

A

Well-fitted prosthesis

Uses impression molding

More precise copy of the normal eye is possible

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21
Q

Stock prosthetic eye/shells

A

AO Monoplex prosthetic eye

Fitting set

Order specifications based on coding system

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22
Q

Variation of standard sets

A

Use of dental wax during refitting and trial

Routine build-up to improve fit

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23
Q

Globe anomalies

A

Scarring
Coloboma
Albinism

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24
Q

What are the basic fitting goals?

A

Optimum pupil diameter

Orthophoric appearance

Stability of fit

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25
Fitting considerations of prosthetic eye
Overall size Smooth edges
26
2 types of evisceration procedures
With insertion of an intra-scleral implant Without implant insertion
27
Enucleation is indicated for the ff conditions:
Intraocular malignancy Painful, blind eye Disfigured, painless, blind eye
28
A clear, non-water- absorbent spheres of 12 to 20mm diameter, used for implantation after evisceration or enucleation
Polyethylene Beren’s spheres
29
An implant made of bone-like porous material derived from ocean coral
BioeyeTMhydroxyapatite ocular implant
30
A clear, plastic, oval-shaped concave discs placed in the socket over the implant during the post op
Conformers
31
Aspects of care and maintenance of prosthetic devices that require attention:
Insertion and removal Frequency of removal Cleaning the prosthetic eye/shell
32
After-care evaluation of prosthetic eye
Scratches, deposits Refitting Replacement
33
Indications for modification of prosthetic eye
Children who have outgrown their prosthesis Socket shrinkage Orbital or lid changes Changes in the normal eye
34
Modifications performed
Enlarging the prosthesis Size reduction of prosthesis Prosthesis alignment
35
Modifications to be made when changing the iris/scleral colour
Use of color codes More yellow and brown for the aging sclera
36
Ocular features to be added to match the developed eye
Pterygium Arcus senilis Iris freckles Ptosis crutch Artificial skin or cheek
37
Management of the patient with an ocular prosthesis
History Test functional eye Inspection of orbit Cleaning and polishing of prosthesis
38
Supplies and equipment used for modification of prosthetic eye
CL modification unit Motorized spindle Dental wax Alcohol lamp Dental burrs Sandpaper Dental tools
39
Patient education
Protection Vision mobility Driving After care
40
In the 1880's, blown glass shells were used by?
Eugene Kalt August Muller Eugen Fick
41
Scleral lens is also known as?
Haptic lens
42
According to recorded history, what contact lenses were the first contact lenses created?
Scleral contact lenses
43
He attempted to reduce the ectasia of a keratoconic cornea by using the shell to compress the cone
Eugene Kalt
44
He investigated the correction of high myopia with a corrective lens applied directly to the cornea
August Muller
45
He corrected irregular astigmatism by replacing deformed cornea with another regularly curved surface
A. Eugen Fick
46
A term used to define a mistiness of vision accompanied by appearance of rainbow-coloured haloes
Sattler's veil
47
Attempts to increase wearing time of prosthesis
Use of buffer solutions Changes in lens parameters Channels, fenestrations, slot and ducts were trialled
48
from the greek word meaning “to fasten” or “attach”
Haptic
49
A contact lens with a haptic portion. The main bearing portion of the lens is over the sclera. Also known as a scleral lens.
Haptic lens
50
A haptic contact lens
Scleral lens
51
Part of the lens which overlays the sclera/conjunctiva.
Haptic (scleral) portion
52
the central part of the lens which covers the cornea and limbus.
Optic (corneal) portion
53
the area of change in curvature/section of the lens between the central optic and the peripheral haptic.
Transition
54
a hole in the lens to assist fluid exchange.
Fenestration
55
A furrow on the back surface of the lens to enhance tear exchange.
Channel
56
a semi-finished stock lens, a lens constructed with a predetermined standardized back surface form/shape.
Performed lens
57
A lens molded from a cast of the anterior surface of the eye for which it is intended.
Impression lens
58
contact lens shape without optics.
Contact shell
59
Indications for scleral lenses
Patients involved in active water sports Decentred pupils Poorly centred lenses Advanced keratoconus Pathological and disfigured eyes
60
Types of scleral lenses
Performed Impression
61
Types of acceptable scleral lens fit
Flush fit Semi-sealed fit Ventilated fit Sealed fit
62
a haptic contact lens designed to change or improve the appearance of the patient and having optical power.
Cosmetic (prosthetic) haptic lens
63
cosmetic haptic shell without optics. Usually fitted over an irregular, damaged or deformed globe.
Cosmetic (prosthetic) shell
64
Disadvantages of scleral lenses
Long fitting time Greater expense
65
Types of scleral fitting sets
Wide angle Spherical Off-set FLOMS
66
FLOMS means
Fenestrated lenses for optic measurement
67
A haptic shell or lens which closely parallels the shape of the anterior eye.
Flush fit
68
A haptic shell or lens incorporating modifications to allow the postlens tear film to escape to the lens edge.
Semi-sealed fit
69
fenestrated haptic shell or lens.
Ventilated fit
70
For physiological reasons at least, this is an unacceptable fit.
Sealed fit
71
In what year Sir John F. N. Herschel discussed the concept of impression molding?
1845
72
Scleral lens insertion procedure
Fill lens with saline Instruct px to lean forward, Head bowed, eyes looking straight ahead, lens not tilted
73
Removal of lens procedure
Patient look down Upper lid pushed behind lens edge Slight upward pressure from lower lid
74
The following symptoms should be noted when wearing scleral lenses:
Bubbles Froth Clicking Photophpbia Lacrimation Blurred vision following lens removal Diplopia Haloes Mucus
75
In what year does the concept of impression molding introduced?
1800s
76
Josef Dallos made use of material derived from seaweed which termed as _____
Negocoll
77
DW
daily wear
78
e.g.
for example
79
EW
extended wear
80
GAG
glycosaminoglycan
81
GPC
giant papillary conjunctivitis
82
HCL
hard contact lens
83
i.e.
that is
84
K
Keratometry result
85
R&L
Right and left
86
SCL
soft contact lens
87
TCA
TriCarboxylic Acid
88
ADP
adenosine diphosphate
89
ATP
adenosine triphosphate
90
NADPH
nicotinamide adenine dinucleotide phosphate

OCULAR PROSTHE (1 decks)

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