Assessor Resource

HLTOPD404B
Dispense atypical prescriptions

Assessment tool

Version 1.0
Issue Date: May 2024


Work performed may include dispensing atypical optical appliances and undertaking minor corrections and repairs to these appliances

All tasks are conducted in accordance with industry standards, organisation policies and procedures, and infection control guidelines

This unit of competency describes the skills and knowledge required to identify atypical prescriptions and to use measurements and calculations for planning an effective dispensing strategy

You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)

Prerequisites

Pre-requisite units

This unit must be assessed after successful achievement of pre-requisites:

HLTOPD401B Work effectively in the ophthalmic industry

HLTOPD403B Dispense optical appliances and services

Employability Skills

This unit contains Employability Skills



Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

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:

Distometer

BVD calculator

BVD table

BVD rule

Pupillometer

Lens measure

Thickness callipers

PD rule

Method of assessment

Observation in the work place (if possible)

Written assignments/projects 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/Test

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 and/or Torres Strait Islander clients and communities

Related units:

This unit should be undertaken after or in conjunction with unit:

HLTOPD407B Perform workshop skills and place orders

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

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:

Aphakic lenses including

aspheric lens design

centering

compensating for BVD change

edging,/bevelling treatments

full field lens design

general problems associated with dispensing aphakic lenses including jack-in-the-box effect and ring scotoma

lenticular designs

Field of view including:

apparent v real

aspheric lenses

calculations

high minus corrections

high plus corrections

High ametropia including:

back Vertex Power (F'v) Front Vertex Power (Fv)

compensated surface power

corrections

prescription requirements and constraints

thick lens power

types

High minus lenses and negative lenticulars including:

centering

dispensing high index materials

edging/bevelling treatments

high index materials

lenticular types and designs

surface reflections and the need for AR and multi-coatings

High prismatic corrections including:

edging/bevelling treatments

fresnels and their use

high horizontal prism

high vertical prism

continued ...

Essential knowledge (continued):

Handling aniso and antimetropia including

base curve selection

correcting vertical imbalance problems

effects of lens form (shape)

effects of thickness

prism differential

Spectacle magnification including:

effects on visual acuity

positive v negative lenses

retinal image size

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:

Calculate vertex distance and measurements including:

change in vertex distance

compensated power (Fc)

effective power (Fe)

effectivity

prescriptions requiring compensations

vertex distance measurement techniques

Calculate differential prismatic effect and compensation using different sized segments or slab off bifocals

Calculate field of view and determine ways to improve the field of view

Calculate spectacle magnification and determine ways to reduce the effects of aniseikonia

Compound and resolve prism

The Range Statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Add any essential operating conditions that may be present with training and assessment depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts.

Prescriptions may include:

High ametropia

Anisometropia

Prism

Aphakia

Equipment may include but is not limited to:

Distometer

BVD calculator

BVD table

BVD rule

Pupillometer

Lens measure

Thickness callipers

PD rule

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Interpret the parameters of atypical prescriptions 
Analyse the prescription and identify areas of freedom and constraints 
Assess the individual needs and requirements of the client 
Select possible frame/lens/treatment combinations to suit the individual client s requirements 
Perform measurements necessary to accurately dispense atypical prescriptions 
Perform any necessary calculations required to dispense the prescription accurately 
Evaluate the most appropriate course of action to be taken to meet the cosmetic, optical and functional needs of the atypical client 
Select appropriate frames to suit a variety of atypical prescriptions 
Select appropriate lenses to suit the needs of atypical prescriptions 
Select and specify appropriate bevelling and edging requirements to enhance the cosmetics and quality of the spectacles 
Select appropriate lens treatments or additional requirements to maximise the visual performance and enhance the quality of the finished spectacles 
Measure and specify the most appropriate lens fitting criteria 
Ensure the quality of the finished spectacles 
Fit and adjust the spectacles for the client ensuring that they are informed of the appropriate way to care for and use their spectacles 

Forms

Assessment Cover Sheet

HLTOPD404B - Dispense atypical prescriptions
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:

Assessment Record Sheet

HLTOPD404B - Dispense atypical prescriptions

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

Date: