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416 test > Cram time > Flashcards

Cram time Flashcards

1
Q

What is the FOV with a 78D lens

A

81/97 degrees

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2
Q

What is the magnification of a 78D lens

A

0.93x

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3
Q

What is the WD for a 78D lens

A

8mm

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4
Q

FOV of a 90D ?

A

74/89 degrees

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5
Q

Image magnification of 90D?

A

0.76x

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6
Q

Working distance of 90D?

A

7mm

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7
Q

Super Vitreousfundus FOV?

A

103/124 degrees

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8
Q

Image magnification of Super Vitreousfundus?

A

0.57x

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9
Q

working distance of Super Vitreousfundus?

A

4-5mm

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10
Q

Superfield NC FOV?

A

95/116 degrees

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11
Q

Superfield NC mag?

A

0.76x

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12
Q

Superfield working distance?

A

7mm

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13
Q

Superpupil XL FOV?

A

103/124 degrees

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14
Q

Superpupil XL mag?

A

0.45x

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15
Q

Superpupil XL working distance?

A

4mm

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16
Q

Digital high mag FOV?

A

57/70 degrees

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17
Q

Digital high mag, image magnification?

A

1.30x

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18
Q

Digital high mag WD?

A

13mm

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19
Q

Digital wide field FOV?

A

103/124 degrees

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20
Q

Digital Wide Field mag?

A

0.72x

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21
Q

Digital Wide Field WD?

A

4-5mm

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22
Q

The distance from the point where the screw intersects with the horizontal axis of the temple to the tip of the temple, measured along the temple axis is called?

A

temple length

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23
Q

The distance from the point where the screw intersects with the horizontal axis of the temple to the centre of the bend is called?

A

length to bend

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24
Q

The distance between the inside of the temples at the base of the fitting triangle is called?

A

Temple width

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25
Q

The angle formed by the temples and the frame front is called?

A

Pantoscopic tilt

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26
Q

What is the difference between pantoscopic tilt and retroscopic tilt?

A

For pantoscopic tilt the lens bottom is rotated towards the cheeks. For retroscopic tilt the lens bottom is rotated away from the cheeks

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27
Q

The angle between the temples and the frame front is called? What is the ideal angle for a standard aligned frame?

A

let-back

95 degrees

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28
Q

The angle formed by a line parallel to the rim of the frame where it rests on the nose and the perpendicular line dividing the nose in two, viewed from directly in FRONT ?

A

Frontal angle

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29
Q

The angle formed by a line parallel to the rim of the frame where it rests on the nose and perpendicular line dividing the nose in two, viewed from ABOVE?

A

Splay

30
Q

The surface at the apex of the bridge which sits on the top of the nose? This is only of interest in what situation?

A
  • crest

- plastic frames and comfort bridges where the crest is in contact with the nose

31
Q

The angle formed by a line parallel to the inside surface of the apex of the bridge where it rests on the nose and a line parallel to the front of the face (viewed from the side)

A

crest angle

32
Q

Whether the crest angle matches the wearer’s nose also depends on what other frame parameter?

A

pantoscopic tilt

33
Q

The distance from the horizontal centre line to the crest of the frame?

A

crest height

34
Q

The frame position predetermined by the manufacturer is known as?

A

standard alignment

35
Q

What two important alignment errors are there to assess in the plane or levelness of the lenses to each other?

A

X-ing and coplanar alignment

36
Q

When the bridge is twisted, causing the eye-wires of the frame front to form an X when you look at the frame from the side, this is called?

A

X-ing

37
Q

If the lenses planes are parallel but one lens is further forward than the other, it is said that the lenses are not _____

A

coplanar

38
Q

Temple-fold angles should be same and closely parallel for what two reasons?

A
  1. to fit easily into a spectacle case

2. the side that doesn’t hang down may rub on the inside surface of the lens

39
Q

In the boxing system, the width of the box is what measurement of the frame? This is often referred to as the ____ dimension.

A

eye size

A dimension

40
Q

The distance between the top and bottom lines of the box (in the boxing system) is the ______ ______ and is also known as the ___ dimenstion

A

frame depth

B

41
Q

in the datum system, the length of the datum line between the peak of the bevel at the temple end and the peak of the bevel at the nasal end is?

A

eyesize

42
Q

The boxing system generally gives a larger ____ and a smaller _______ than the datum system

A
  1. eyesize

2. bridge size

43
Q

What is the most significant facial difference between an adult and young children to consider for frame selection?

A

do not have a developed nose

44
Q

What are the characteristics of a good kid’s frame? (5)

A
  • lower crest
  • larger frontal angle
  • larger splay
  • flatter pantoscopic tilt
  • ability to shorten temples
45
Q

What is the minimum edge thickness for a supra frame?

A

2.2mm

46
Q

What is the tolerance of the cyl component in this Rx (for SV or MF lenses)? -3.00/-1.50 x 180

A

+/-0.09

47
Q

What is the tolerance for sphere values from 0 to +/-9.00 for SV or MF lenses?

A

+/-0.12

48
Q

For all scripts excluding 0 to +/-3.00DS with >0.75 to ≤4.00 cyl, what is the tolerance for cyl values (for SV or MF lenses)

A

+/-0.12

49
Q

For progs and degressive lenses the tolerance for sphere 0.00 to +/-6.00 and/or 0.00 to ≤0.75 cyl is?

A

+/-0.12

50
Q

For progs and degressive lenses (other than under the category of 0 to +/-6.00 with 0.00 to ≤0.75 cyl) the tolerance for both sphere and cyl is?

A

+/-0.18

51
Q

Tolerance for axis for cyl power up to 0.25DC?

A

+/-16

52
Q

Tolerance for axis for cyl power from OVER 0.25 to ≤0.50

A

+/-9

53
Q

Tolerance for axis for cyl power OVER 0.50 to ≤0.75

A

+/-6

54
Q

Tolerance for axis for cyl power OVER 0.75 to ≤1.50

A

+/-4

55
Q

Tolerance for axis for cyl power OVER 1.50 to ≤2.50

A

+/-3

56
Q

Tolerance for axis for cyl power OVER 2.50?

A

+/-2

57
Q

What is the formula for MSU?

A

MSU (mm) = ED + (2 x monocular decentration)

58
Q

In P = cF, what is the unit for c?

A

cm

59
Q

In the edge thickness formula, what is y?

A

half the ED (mm)

60
Q

How many points are there in a 24-2 FDT full threshold test for a Humphrey Matrix Field Analyser?

A

55

61
Q

How many points are there in a 30-2 FDT full threshold test for a Humphrey Matrix Field Analyser?

A

69

62
Q

The N-30-5 and N-30-1 Screening FDT tests have how many points?

A

19

63
Q

The 24-2-5 and 24-2-1 Screening FDT tests have how many points?

A

55

64
Q

For the Medmont “Full field test” (50 degrees) how many points are there?

A

164

65
Q

How many points are there for the Medmont Central test? (30 degrees)

A

100

66
Q

What is the pantoscopic tilt recommended for progressive lenses?

A

10-12 degrees

67
Q

Fat top standard height is __ to __mm below the ___?

A

0 to 2mm

below the top of the lower eyelid

68
Q

Trifocal flat-top standard height is __mm below the ___?

A

2mm

below the bottom of the pupil

69
Q

Frame selection for bifocal or trifocal should have at least ___mm between the segment top and the bottom of the frame?

A

15mm

70
Q

which type of specially worked lens is fitted using the centre of rotation rule (the same as SV)

A

anti-fatigue lenses

416 test (3 decks)

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