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Evidence Guide: HLTOPD004 - Edge and fit ophthalmic appliances

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

HLTOPD004 - Edge and fit ophthalmic appliances

What evidence can you provide to prove your understanding of each of the following citeria?

Elements define the essential outcomes

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare for edging and fitting

  1. Access and correctly interpret required information and prescriptions
  2. Prepare and check equipment and instruments for operational readiness
  3. Select and prepare personal protective equipment as required
Access and correctly interpret required information and prescriptions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare and check equipment and instruments for operational readiness

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select and prepare personal protective equipment as required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Perform edging and fitting

  1. Edge lenses following the tolerances allowed by Australian standards
  2. Produce accurate formers
  3. Use special hand-edging techniques to modify lenses for change-overs and centring corrections
  4. Edge, drill, groove and mount spectacle lenses to frames
  5. Edge, drill and mount spectacle lenses to rimless frames
Edge lenses following the tolerances allowed by Australian standards

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Produce accurate formers

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Use special hand-edging techniques to modify lenses for change-overs and centring corrections

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Edge, drill, groove and mount spectacle lenses to frames

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Edge, drill and mount spectacle lenses to rimless frames

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Adjust and repair frames and lenses

  1. Repair and modify spectacle frames to meet client needs
  2. Complete standard alignment of frames to required standards
  3. Produce tinted lenses to required standards
Repair and modify spectacle frames to meet client needs

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete standard alignment of frames to required standards

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Produce tinted lenses to required standards

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Utilise computer technology

  1. Select appropriate technology andsoftware applications to achieve the requirements of the task
  2. Adjust workspace, furniture and equipment to suit the ergonomic requirements of the user
  3. Use technology according to organisation requirements and in a way which promotes a safe work environment
  4. Carry out or arrange routine maintenance in order to ensure that equipment is maintained in accordance with manufacturer’s instructions and organisation requirements
  5. Identify equipment faults and take action in accordance with manufacturer’s instructions or by reporting fault to designated person
Select appropriate technology andsoftware applications to achieve the requirements of the task

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Adjust workspace, furniture and equipment to suit the ergonomic requirements of the user

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Use technology according to organisation requirements and in a way which promotes a safe work environment

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Carry out or arrange routine maintenance in order to ensure that equipment is maintained in accordance with manufacturer’s instructions and organisation requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify equipment faults and take action in accordance with manufacturer’s instructions or by reporting fault to designated person

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Conduct final checking procedures against Australian standards

  1. Determine any axis or centring error and apply Australian standards tolerances.
  2. Verify powers, axes and centration by checking the spectacles on the focimeter
  3. Check lens surface for scratching and aberrations
  4. Adjust the frame to standard alignment
  5. Check metal framed spectacles for strain and reduce as required
  6. Clean spectacles using appropriate cleaners
  7. Clean, maintain and store equipment in accordance with manufacturers requirements and infection control procedures
  8. Accurately document procedures undertaken according to organisation procedure
Determine any axis or centring error and apply Australian standards tolerances.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Verify powers, axes and centration by checking the spectacles on the focimeter

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Check lens surface for scratching and aberrations

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Adjust the frame to standard alignment

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Check metal framed spectacles for strain and reduce as required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Clean spectacles using appropriate cleaners

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Clean, maintain and store equipment in accordance with manufacturers requirements and infection control procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Accurately document procedures undertaken according to organisation procedure

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

ELEMENT

PERFORMANCE CRITERIA

Elements define the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element.

1. Prepare for edging and fitting

1.1 Access and correctly interpret required information and prescriptions

1.2 Prepare and check equipment and instruments for operational readiness

1.3 Select and prepare personal protective equipment as required

2. Perform edging and fitting

2.1 Edge lenses following the tolerances allowed by Australian standards

2.2 Produce accurate formers

2.3 Use special hand-edging techniques to modify lenses for change-overs and centring corrections

2.4 Edge, drill, groove and mount spectacle lenses to frames

2.5 Edge, drill and mount spectacle lenses to rimless frames

3. Adjust and repair frames and lenses

3.1 Repair and modify spectacle frames to meet client needs

3.2 Complete standard alignment of frames to required standards

3.3 Produce tinted lenses to required standards

4. Utilise computer technology

4.1 Select appropriate technology andsoftware applications to achieve the requirements of the task

4.2 Adjust workspace, furniture and equipment to suit the ergonomic requirements of the user

4.3 Use technology according to organisation requirements and in a way which promotes a safe work environment

4.4 Carry out or arrange routine maintenance in order to ensure that equipment is maintained in accordance with manufacturer’s instructions and organisation requirements

4.5 Identify equipment faults and take action in accordance with manufacturer’s instructions or by reporting fault to designated person

5. Conduct final checking procedures against Australian standards

5.1 Determine any axis or centring error and apply Australian standards tolerances.

5.2 Verify powers, axes and centration by checking the spectacles on the focimeter

5.3 Check lens surface for scratching and aberrations

5.4 Adjust the frame to standard alignment

5.5 Check metal framed spectacles for strain and reduce as required

5.6 Clean spectacles using appropriate cleaners

5.7 Clean, maintain and store equipment in accordance with manufacturers requirements and infection control procedures

5.8 Accurately document procedures undertaken according to organisation procedure

Required Skills and Knowledge

ELEMENT

PERFORMANCE CRITERIA

Elements define the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element.

1. Prepare for edging and fitting

1.1 Access and correctly interpret required information and prescriptions

1.2 Prepare and check equipment and instruments for operational readiness

1.3 Select and prepare personal protective equipment as required

2. Perform edging and fitting

2.1 Edge lenses following the tolerances allowed by Australian standards

2.2 Produce accurate formers

2.3 Use special hand-edging techniques to modify lenses for change-overs and centring corrections

2.4 Edge, drill, groove and mount spectacle lenses to frames

2.5 Edge, drill and mount spectacle lenses to rimless frames

3. Adjust and repair frames and lenses

3.1 Repair and modify spectacle frames to meet client needs

3.2 Complete standard alignment of frames to required standards

3.3 Produce tinted lenses to required standards

4. Utilise computer technology

4.1 Select appropriate technology andsoftware applications to achieve the requirements of the task

4.2 Adjust workspace, furniture and equipment to suit the ergonomic requirements of the user

4.3 Use technology according to organisation requirements and in a way which promotes a safe work environment

4.4 Carry out or arrange routine maintenance in order to ensure that equipment is maintained in accordance with manufacturer’s instructions and organisation requirements

4.5 Identify equipment faults and take action in accordance with manufacturer’s instructions or by reporting fault to designated person

5. Conduct final checking procedures against Australian standards

5.1 Determine any axis or centring error and apply Australian standards tolerances.

5.2 Verify powers, axes and centration by checking the spectacles on the focimeter

5.3 Check lens surface for scratching and aberrations

5.4 Adjust the frame to standard alignment

5.5 Check metal framed spectacles for strain and reduce as required

5.6 Clean spectacles using appropriate cleaners

5.7 Clean, maintain and store equipment in accordance with manufacturers requirements and infection control procedures

5.8 Accurately document procedures undertaken according to organisation procedure

The candidate must show evidence of the ability to complete tasks outlined in elements and performance criteria of this unit, manage tasks and manage contingencies in the context of the job role. There must be evidence that the candidate has:

edged and fitted at least 10 pairs of spectacles to Australian standards, demonstrating the appropriate handling of the following types of frames and materials:

nylon (nyl-tag) rimless

metal full rim

plastic full rim

automatically edged lenses using:

former cutting

blocking/chucking systems

machine operation

drilling

grooving

hand edged lenses using:

hand bevelling techniques

safety chamfering

changeovers

addressed common lens problems:

rectifying off-axis lenses

reducing unwanted vertical and/or horizontal prism

repaired and modified spectacle frames, including:

alignment

refitting nylon

re-pinning and riveting joints

sink joints

soldering metal frames

undertaking frame part replacements

undertake digital fame tracing

used the features of a manual focimeter for the following tasks:

correct neutralisation

determination of additions

determination of axes

determination of centration

determination of powers

determination of prism

accurately calculated minimum size uncut (MSU) using centration chart and by calculation to allow for papillary distance (PD) and decentration for prism

made templates and eliminated errors using:

hand techniques

machine techniques

tinted lenses to match tint samples

mounted lenses

The candidate must be able to demonstrate essential knowledge required to effectively complete tasks outlined in elements and performance criteria of this unit, manage tasks and manage contingencies in the context of the work role. This includes knowledge of:

Australian standards tolerances

transmission and absorption data and its role in edging and fitting

properties of lenses, including:

refractive index

abbe value

specific gravity

impact resistance

transmission and absorption

features and use of impact resistant safety lenses including:

advantages and disadvantages

Australian standards for both general purpose and industrial use

evaluation of materials including glass, CR-39 (allyl diglycol carbonate), trivex, higher index plastics, polycarbonate and laminates

impact resistance

impact testing requirements, conditions and procedures

principles and processing of chemical toughening

problems and special lens requirements

filter and tinted lens processes including:

Australian standards requirements

plastic lens tinting including dyes and tint types, equipment, preparation, problems and solutions

transmission testing including equipment and instrumentation, equipment limitations and Australian standards

vacuum coatings and their use, including:

absorptive (tinted) coatings

handling, cleaning and care of coatings

manufacturing processes

multiple layer antireflection (AR) coatings

single AR coating

the effects of surface reflections and ghost images on lenses

edging and fitting glazing techniques

frame measurement systems including boxing and datum

features of different frames and rims and how to work with them:

different frame materials and their scope of use

techniques for working with frames and rims heating, manipulation, adjusting, handling and repair

rimless types

drilled rimless frames

standard nylon rims

nasal cut and nasal add techniques

features and functions of edging and fitting equipment:

automatic edgers

calibration and checking tools

focimeters (lensmeters)

frame alignment tools

hand edging equipment

marking/centration devices

edging wheel designs and characteristics

machine designs

current and emerging software applications used in the optical dispensing environment