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QUICK-12 QUIZ ANSWERS

Determine the amount of horizontal decentration for the following.

1. "A" measurement = 54   DBL = 16   PD = 62
Answer: 4 mm in each eye

2. "A" measurement = 42   DBL = 14   PD = 50
Answer: 3 mm in each eye

3. "A" measurement = 50   DBL = 16   PD = 66
Answer: 0

4. "A" measurement = 58   DBL = 22   PD = 64
Answer: 8 mm in each eye

Determine the "theoretical" minimum blank size for the following.

5. "A" measurement = 58   DBL = 18   PD = 68   ED = 60
Answer: 68 mm

6. "A" measurement = 52   DBL = 20   PD = 60   ED = 54
Answer: 66 mm

7. "A" measurement = 56   DBL = 16   PD = 64   ED = 59
Answer: 67 mm

8. "A" measurement = 48   DBL = 14   PD = 50   ED = 50
Answer: 62 mm

Calculate the vertical decentration of a bifocal segment.

9. "B" Measurement = 52   Seg height = 23
Answer: 3 mm below

10. "B" Measurement = 48   Seg height = 24
Answer: on line, i.e., no decentration

11. "B" Measurement = 50   Seg height = 28
Answer: 3 mm above

12. "B" Measurement = 46   Seg height = 19
Answer: 4 mm below

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