This describes the essential skills and knowledge and their level required for this unit

Essential knowledge

The candidate must be able to demonstrate essential knowledge required to effectively do the task outlined in elements and performance criteria of this unit manage the task and manage contingencies in the context of the identified work role

This includes knowledge of

Drilled rimless frames including mounts and rimless types and equipment needed Relevant Australian standards

Filter and tinted lens processes including

Australian standards

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

transmission testing including equipment and instrumentation equipment limitations and Australian standards

Frame measurement systems including boxing and datum

Glazing techniques

Impact resistant safety lenses including

advantages and disadvantages

Australian standards for both general purpose and industrial use

evaluation of materials including glass CR higher index plastics polycarbonate and laminates

impact resistance

impact testing requirements conditions and procedures

principles and processing of thermal and chemical toughening

problems and special lens requirements

Scope of metal and plastic frame material including heating manipulation adjusting handling and repair

Standard nylon rims including the equipment needed

The properties of lens

The use of impact resistant protective lenses

Vacuum coatings including

absorptive tinted coatings

handling cleaning and care of coatings

manufacturing processes

multiple layer AR coatings

single AR coating

surface reflections and ghost images

Essential skills

It is critical that the candidate demonstrate the ability to effectively do the task outlined in elements and performance criteria of this unit manage the task and manage contingencies in the context of the identified work role

This includes the ability to

Apply drilling techniques

Calculate minimum size uncut MSU using centration chart and by calculation to allow for PD and decentration for prism

Correctly and accurately use a focimeter lensmeter including

correct neutralisation

determination of powers

determination of axes

determination of prism

determination of centration

determination of additions

Undertake automatic edging including

machine designs

blockingchucking systems

edging wheel designs and characteristics

machine operation

Apply grooving techniques

Fit standard nylon rims

Hand edge using both hand bevelling techniques and safety chamfering

Handle glass and plastic lens material

Handle metal and plastic frame material

Identify and explain the nature of vacuum coatings

Interpret manufacturers transmission curves

Interpret transmission and absorption data

Mount lens

Rectify offaxis lenses

Repair and service nylon rims

Transpose a prescription

Undertake digital fame tracing

Undertake frame servicing and adjustments

Use appropriate techniques to inset lens and fit frames

Use lens samples and to match samples

Undertake special hand edging techniques including

changeovers

nasal cut and nasal add antinasal

Use problem solving techniques in reducing unwanted vertical andor horizontal prism

The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria Required Skills and Knowledge the Range Statement and the Assessment Guidelines for this Training Package

Critical aspects for assessment and evidence required to demonstrate this competency unit

The individual being assessed must provide evidence of specified essential knowledge as well as skills

Observation of actual or simulated workplace performance is essential for assessment of this unit

Consistency of performance should be demonstrated over the required range of situations relevant to the workplace

Where for reasons of safety space or access to equipment and resources assessment takes place away from the workplace the assessment environment should represent workplace conditions as closely as possible

Context of and specific resources for assessment

Resources essential for assessment include

Access to an optical appliance manufacturing workplace

Method of assessment

Observation in the workplace if possible

Written assignmentsprojects or questioning should be used to assess knowledge

Case study and scenario as a basis for discussion of issues and strategies to contribute to best practice

Questioning

Role playsimulation

Access and equity considerations

All workers in the health industry should be aware of access and equity issues in relation to their own area of work

All workers should develop their ability to work in a culturally diverse environment

In recognition of particular health issues facing Aboriginal and Torres Strait Islander communities workers should be aware of cultural historical and current issues impacting on health of Aboriginal and Torres Strait Islander people

Assessors and trainers must take into account relevant access and equity issues in particular relating to factors impacting on health of Aboriginal andor Torres Strait Islander clients and communities

Related units

It is recommended that this unit be assessed in conjunction with the following related unit

HLTOPTB Perform technical procedures for the production of ophthalmic appliances

HLTOPT401B Perform technical procedures for the production of ophthalmic appliances

Relevant equipment may include:

Lens material includes:

Fame material includes:

Repairing and modifying spectacle frames must include:

Atypical

Technology may include:

Software applications may include:

Routine maintenance may include:

Equipment faults or problems may be identified or anticipated by: