Quiz 6

Question 1

The two ways a prism must be expressed in relationship to a prescription are:

Answer 1

Prism Dioptric Power

Base Direction

Question 2

For the following, calculate the amount of image jump the client will experience:

FT 25 bifocal, Add: +2.50
Image Jump=

Answer 2

1.25 prism diopters

Question 3

Excessive prism base up will cause the client to see: (select the correct response)

the floor appears convex

the floor appears concave

vertical objects as being taller than they are

all of the above

Answer 3

the floor appears convex

Question 4

Transcribe the following RX into an intermediate prescription:

OD: +3.25 - 0.50 x 35
OS: +1.50 - 1.50 x 170
Add: +2.75 o.u.

Intermediate RX: ?

Answer 4

OD: +4.62 -0.50 x 35
OS: + 2.87 -1.50 x 170

Question 5

Identify the following diagrammed lense by name:

Answer 5

Flat Top

Question 6

Identify the following diagrammed lense by name:

Answer 6

Ultex A

Question 7

Which type of bifocal has the least image jump?

(select the correct response)

FT 25

Round 22

Ultex A

Executive

Answer 7

Executive: it has 0

FT is 5, Round 22 would have 11, and Ultex A has 19

Question 8

Image jump of a bifocal add causes the image to jump:

Answer 8

up

Question 9

Which type of bifocal has the greatest thickness?

(select the correct response)

FT 25

Round 22

Ultex A

Executive

Answer 9

executive

Question 10

Prism base 45 degrees before the right eye is the same as prism base:

up and out

up and in

down and out

down and in

cannot be determined

Answer 10

up and in

Question 11

Identify the following diagrammed lense by name:

Answer 11

Executive

Question 12

Identify the following diagrammed lense by name:

Answer 12

Round Seg

Question 13

When light strikes a prism, it will deviate toward the ________________ while the image will be displaced toward the ______________.

Answer 13

When light strikes a prism, it will deviate toward the Base while the image will be displaced toward the Apex.

Question 14

Excessive prism base down will cause the client to see:

(select the correct response)

the floor appears as if concave

as if they are standing in a hole and walking uphill

vertical objects as being taller than they are

all of the above

Answer 14

all of the above

Question 15

For the following, calculate the amount of image jump the client will experience:

Round 28 bifocal, Add: +1.50
Image Jump=

Answer 15

2.1 prism diopters

Question 16

Identify the following diagrammed lense by name:

Answer 16

Ribbon Seg

Question 17

Write the TRP from the following RX:

OD: +1.00 - 1.00 x 90
OS: +1.25 -0.75 x 65
Add: +2.50 o.u.

TRP: ?

Answer 17

OD: +3.50 -1.00 x 90
OS: +3.75 -0.75 x 65

Question 18

The direction of the base direction for prisms is expressed in degrees from:

Answer 18

0-360

Question 19

For the following, calculate the amount of image jump the client will experience:

Executive bifocal, Add: +1.75
Image Jump=

Answer 19

0

Question 20

For the following, calculate the amount of image jump the client will experience:

Ultex A bifocal, Add: +2.00
Image Jump=

Answer 20

3.8 prism diopters

Question 21

Resolve the following prism (Find X and Y components):

OD: -3.00 -1.00 x 30 (combined) 5.00 prism diopters @200

Answer 21

X = 4.7^ BO Y = 1.7^ BD

x = R (cos)(angle)

y = R (sin)(angle)

Question 22

Find the resultant prism (R and degree) from the following information:
OS: +1.00 -2.00 x170 (combined) 2.00 prism diopters BI and 3.00 prism diopters BU

Answer 22

3.6 prism diopters at 124 degrees

r = square root of [x(squared) + y(squared)]

x=2 y=3

r= 3.6 prism diopters

theta = tan-1 (y/x)

theta = 56.309 degrees

180-56.309 =

theta = 123.69 degrees

Question 23

Identify the following diagrammed lense by name:

Answer 23

Double D lens

Question 24

Which type of bifocal has the most image jump?

(select the correct answer)

FT 25

Round 22

Ultex A

Executive

Answer 24

Ultex A (19)

FT is only 5, Round 22 is only 11, and Executive is 0

respectively the lowest mm for d the lowest Image Jump

Question 25

The 2nd quadrant, in reference to meridian notation, has degrees ranging from:

Answer 25

90 - 180