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Practical dispensing, Part 2: continuing the series on practical dispensing cases, the practitioner is required to consider each scenario and identify the correct course of action.


01 Which of the following will not help prevent this type of breakage?

a) Advising on appropriate handling, cleaning and care

b) De-burring drill holes, ensuring there is no debris in the holes before compressing the joints

c) Routinely dispensing CR39 lenses

d) Limiting lens choice to mid index materials such as 1.6 or Trivex

02 Which is not an advantage of these spectacles?

a) Ultra-lightweight hypoallergenic titanium maximises comfort

b) Suitable for any lens type and/or material

c) A number of bridge sizes and side lengths are available

d) Some lens manufacturers offer remote edging facilities

03 Which of these patients would not be suited to customised rimless glasses?

a) Patient requiring extra lens depth to avoid looking under the lens when reading

b) Patient with a stoop who requires extra height to the lens to avoid looking over the top when walking

c) Patient with a narrow PD, high Rx and wide head requiring small lenses and large temple width / lugs

d) Patient that requires Franklin split bifocals


04 On the rimless mount above, what is the plastic tool used for?

a) Tightening/removing screws

b) Removing compression plugs during disassembly/ repair

c) Gauging the size of drilled holes for correct plug selection

d) Bracing the screwless hinge before removing the side from the lug

05 Who might not find this kind of spectacles ideal?

a) A patient who is allergic to nickel, stainless steel and cellulose acetate

b) A high myope who wants 1.9 index glass lenses

c) A pool player wanting the upper lens edge to be higher than normal to avoid looking over the top

d) A patient with facial asymmetry requiring one lens to be bigger than the other

06 Which of the following is not a benefit of plugged rimless spectacles?

a) They are usually very lightweight

b) Ability to mix and match lens shapes with mount styles

c) They often have fine sides, which are ideal for patients who wear hearing aids, helmets and wigs

d) It is easy to change the nose pads for a strap bridge or pads of different sizes, shape or material


07 Which of the following is not an option for a patient wanting budget PPLs selecting a frame with a pantoscopic tilt of 3[degrees]that cannot be adjusted?

a) Advise the patient that a conventional PPL is unlikely to give clear near vision

b) Offer a different frame with a tilt close to 9[degrees]

c) Advise the patient that because the frame cannot be adjusted only an individualised varifocal will provide good near vision

d) Dispense without warning the patient

08 With regard to the iso-cylinder plots above, which is false?

a) Iso-cylinder plots measure unwanted distortion

b) Iso-cylinder plots measure unwanted aberrational astigmatism

c) Iso-cylinder contour lines each measure 0.50D of astigmatism

d) Image C2 shows that the quality of reading vision is likely to be poor

09 A patient complains of problems reading with new PPLs. What is the best first course of action?

a) Tell the patient to try them for another two weeks

b) Claim the non-tolerance guarantee

c) Book the patient for a retest

d) Check pantoscopic tilt and adjust to optimum angle

Exam questions and references

Under the enhanced CET rules of the GOC, MCQs for this exam appear online Please complete online by midnight on 9 September 2016. You will be unable to submit exams after this date.


10 The image shows a R24 seg bifocal. According to What is the term for the distance s, measured from the distance optical centre to the segment top?

a) Segment height

b) Segment depth

c) Segment drop

d) Segment position

11 When should you state the distance s on an order?

a) When ordering a pair of no-jump bifocals

b) When ordering a single uncut bifocal lens to match another to avoid vertical differential prismatic effect

c) When ordering a pair of Franklin split bifocals

d) When ordering a pair of bifocals for an anisometropic patient when one of the lenses is to be slabbed off

12 If s = 5mm, r =12mm, and the Rx is R. +4.00DS Add +2.50, what is the jump?

a) 2 [DELTA] base up

b) 4.8 [DELTA] base down

c) 3.5 [DELTA] base up

d) 3 [DELTA] base down

Course code: C-52282 Deadline: 9 September 2016

Learning objectives


* Be able to dispense patients with appropriate customised frame and lens choices (Group 4.1.5)

* Be able to resolve non-tolerance cases (Group 4.1.7)

* Understand the importance of bifocal measurements in relation to image jump (Group 4.1.5)

Dispensing opticians

* Be able to dispense patients with appropriate customised frame and lens choices (Group 4.1.2)

* Be able to resolve non-tolerance cases (Group 4.1.1)

* Understand the importance of bifocal measurements in relation to image jump (Group 4.1.2)
Optometrists               OPTICAL APPLIANCES

Dispensing opticians       OPTICAL APPLIANCES

Peter Black MBA, FBDO

* Peter Black is the dispensing standards manager for Boots Opticians, an ABDO practical examiner and immediate past president of ABDO.
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Title Annotation:VRICS
Author:Black, Peter
Publication:Optometry Today
Date:Aug 1, 2016
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