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Occupational Dispensing: Dispense with Confidence Part 3

C-19712 (non-interactive)

Dates: 19/10/2012 to 16/11/2012
Pass Mark: 60%

When presbyopia sets in, a single vision correction fails to solve the problems which come with it. Unfortunately, single vision lenses do not offer correction over the range of vision required to perform both intermediate and near tasks. Therefore the dispensing optician should be capable of dispensing suitable occupational lenses to patients and so should have sufficient knowledge to do this. Occupational lenses can also be utilised in many other different facets of dispensing to satisfy patients' other occupational requirements. This article discusses the key considerations to help improve practitioners' confidence for performing such dispenses.

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The Norville Versatile Office is being dispensed for a patient with an intermediate addition of +0.75D and a reading addition of +2.00D. What is the patient's degression?

  • A: -0.50D
  • B: -0.75D
  • C: -1.00D
  • D: -1.25D


When dispensing a DD28 trifocal, where does the dispenser need to set the lower segment heights?

  • A: In line with lower limbus
  • B: In line with centre of pupil
  • C: 2mm higher than lower limbus
  • D: 1mm lower than lower limbus


Which of the following is an advantage which executive trifocals possess over occupational PPLs?

  • A: Lenses must be dispensed without H/MAR
  • B: They are cosmetically more attractive
  • C: They have no peripheral distortion
  • D: They have only three distinct working distances


Which of the following is NOT a common symptom of computer vision syndrome?

  • A: Dry eye
  • B: Blurred vision
  • C: Eyestrain
  • D: Diplopia


A patient has an intermediate addition of +1.50D and a reading addition of +2.50D. What is this patient's IP/RP ratio?

  • A: 40%
  • B: 50%
  • C: 55%
  • D: 60%


Which of the following does NOT need to be taken into account when carrying out an occupational spectacle dispense?

  • A: Working distance
  • B: Whether the task is still or moving
  • C: Electrical wire hazards
  • D: Lighting available

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