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Clinical Refraction (Laboratory) > Trial lens Set > Flashcards

Trial lens Set Flashcards

1
Q

A tool used by optos to determine a patients eye refraction either in the form of eyeglasses or contact lenses

A

Trial box
Trial case
Trial lens

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2
Q

It measure/check refractive error

A

Trial lens

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3
Q

Objective refraction

A

No need for response

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4
Q

Subjective refraction

A

Need response

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5
Q

For diplopia charting

A

Trial lens

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6
Q

Assess binocular vision

A

Trial lens

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7
Q

Measure lenses (hand neutralization)

A

Trial lens

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8
Q

Contents or accessories of trial set

A

Trial frame
Trial lenses
Prisms
JCC
Frosted lens
Plano lens
Red green cobalt blue filter
Red white maddox rod
Stenopaic slit
Occluder
Pinhole
Near VA chart
PD rule

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9
Q

an eyeglass frame designed to permit insertion of different lenses used in correcting refractive errors of vision

A

Trial frame

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10
Q

4-5 components

A

1- high powered lens
2- spherical lens
3- cylindrical lens
4- accessory and prisms

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11
Q

Accommodates up to five, 38mm lenses for each eye

A

Full aperture frame

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12
Q

Independent screw adjustment for PD to 48 to 80mm

A

Full aperture frame

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13
Q

It holds up to four, 38mm lenses for each eye. Accessories may be easily inserted and extracted

A

Reduced aperture frame

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14
Q

Nosepiece for child. PD of 54 to 58mm and available for adults with PD 59 to 67mm

A

Half eye trial frame

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15
Q

Power is the SAME all throughout

A

Spherical lens

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16
Q

Convex

A

Plus

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17
Q

Concave

A

Minus

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18
Q

Thicker at the center thinner at the edge

A

Sphere Plus lenses (convex)

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19
Q

Made up of base-in prism

A

Sphere plus lenses

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20
Q

Converge rays of light

A

Sphere Plus lenses

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21
Q

CC lenses; thinner at center thicker at sides

A

Sphere minus lenses

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22
Q

Made up of base out prisms

A

Sphere minus lenses (concave)

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23
Q

Diverge rays of light

A

Sphere minus lenses

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24
Q

Could be minus or plus with axis markings

A

Cylinder

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25
Surface has a flatter curve and and a greater curve
Cylinder
26
Used to measure and correct astigmatism
Cylinder lenses
27
Is a refractive medium having 2 plane surfaces inclined at an angle
Prism
28
Used to measure and correct the eye's deviation from its normal plane
Prism
29
Used in dissociation tests
Prism
30
Comes in power range of 0.5 prism D, 1 PD to 6PD in 1P steps
Prism
31
A wedge shape probe body which is capable of diffracting rays of light into its components colors
Prism
32
A lens with zero power
Plano power lens
33
Used to satisfy and identify malingering patients
Plano power lens
34
Used in balancing tests such as duochrome or worth 4 dot test
Red green filter
35
Used to find our suppression of eyes
Red green filter
36
May be user to measure fusion
Red green filter
37
Used to check color sense of the retina
Red green filter
38
To check whether color deficiency can be managed with a filter
Red green filter
39
Used in association with fluorescein straining during slit lamp exam
Cobalt blue
40
Measurement of dry eye
Cobalt blue
41
Used to enhance contrast of patients with decreased contract sensitivity
Amber (yellow)
42
Made up of series of red cylinders and used to deter heterophoria and cyclophoria
Maddox rod
43
Used in dissociation test
Maddox rod
44
A black opaque disc with a horizontal thin slit at the center
Stenopaic slit
45
Can be used to taking VA in all meridians of the px eyes
Stenopaic slit
46
Differentiate causes of haloes in Fincham's test
Stenopaic slit
47
An opaque plastic disc
Occluder
48
To occlude on eye and to relax accommodation
Occluder
49
Used to dissociate fusion and used to close one eye, while the other eye can be tested for visual acuity
Occluder
50
Opaque disc with pinhole of 1-2mm diameter in its centre
Pinhole
51
Allows only a pencil of light pass through the corneas
Pinhole
52
Helps to determine whether eye has a refractive or pathological error
Pinhole
53
Pinhole of 1.32mm is more effective
Pinhole
54
A valuable tool used to check the power and axis of the correcting cylinder
JCC
55
A semi-opaque white lens with a matte finish
Frosted lens
56
Used as an occluder for children
Frosted lens
57
Used in measuring inter-pupillary distance and/or pupil diameter
PD RULE
58
Introduced by richard snellen
Reduced snellen Near chart
59
Can be user to measure near point of accommodation
Reduced snellen
60
Consist of ordinary printers fonts of varying sizes
Jaegers card
61
Prints are marked from 1-7: px acuity is labeled as J1 to J7 depending upon the print the px can read clearly
Jaegar Card
62
Used in taking near rx or presbyopic add
Jaeger's card
63
Also used in taking near prescription or presbyopic add
0.63 EM type
64
A small handheld chart that has paragraphs of tests which is smallest at the top and largest at the bottom
NEAR chart
65
N6 is normal; n referring to near and 6 referring to size of letters
Near Chart
66
NEAR VA CHARTS
Reduced snellen Jaeger's chart 0.63 EM type Near chart
67
OD +2.00 = -1.25 x 90 OS +4.00 = -0.25 x 85
68
OD -3.00 = -0.50 x 175 OS -0.50 = -3.00 x 145
69
OD frosted lens OS 2 prism diopter base out
70
OD +4.00 D with horizontal red maddox 2 prism diopter OS open
71
OD +2.00 = +3.00 x 65 OS +2.00 = +1.00 x 105 Add 2.50
72
OD occluder OS pinhole
73
OD +11.00 with red filter OS -15.00 with green filter
74
OD stenopaic slit OS occluder
75
OD +4.00 = -1.00 x 70 with 5 prism base out OS +8.00 = -2.00 x 10 with 6 prism base out
76
OD -1.00 OS -0.50 = -0.50 x 55 with white vertical maddox

Clinical Refraction (Laboratory) (1 decks)

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