OPT510 - Ophthalmic Dispensing & Lensometry Refresher

Outline info
Last revision date 2016-07-12 15:59:39.798
Last review date 2016-07-12 15:59:39.799

Subject Title
Ophthalmic Dispensing & Lensometry Refresher

Subject Description
This refresher subject is available to Registered Intern Opticians who are preparing to take the Registration Examinations. The learner is provided with a review of critical dispensing procedures including P.D., vertex distance and multifocal lens measurement. Lensometry for lens duplication and verification is included.

Credit Status
Special Interest

Learning Outcomes
Upon successful completion of this subject the student will be able to:

1. Take monocular P.D. measurements using a ruler and pen light and a pupilometer

2. Take vertex distance measurements on a frame using a distometer.

3. Accurately measure the fitting height for progressive and segmented bifocal lenses.

4. Determine lens specifications from a series of glazed eyeglasses for the purpose of duplicating the lenses.

5. Determine the specifications of glazed eyeglasses to verify that they meet the Standard Lens Tolerances.

6. Adjust frames of various design on a model

7. Bench aligh plastic, metal, 4 point rimless and nylon mount frames.

Cheating and Plagiarism
Each student should be aware of the College's policy regarding Cheating and Plagiarism. Seneca's Academic Policy will be strictly enforced.

To support academic honesty at Seneca College, all work submitted by students may be reviewed for authenticity and originality, utilizing software tools and third party services. Please visit the Academic Honesty site on http://library.senecacollege.ca for further information regarding cheating and plagiarism policies and procedures.

All students and employees have the right to study and work in an environment that is free from discrimination and/or harassment. Language or activities that defeat this objective violate the College Policy on Discrimination/Harassment and shall not be tolerated. Information and assistance are available from the Student Conduct Office at student.conduct@senecacollege.ca.

Accommodation for Students with Disabilities
The College will provide reasonable accommodation to students with disabilities in order to promote academic success. If you require accommodation, contact the Counselling and Disabilities Services Office at ext. 22900 to initiate the process for documenting, assessing and implementing your individual accommodation needs.

Registered Intern Optician status with the College of Opticians of Ontario.

Topic Outline
PD/ VD Measurement

  • Procedure for ruler and penlight method
  • Monocular and binocular; distance and near
  • Procedure for pupilometer method
  • Procedure for measuring vertex distance
  • Good patient handling / informed  consent
Segment / Fitting Height
  • Flat top and progressive height measurement
  • Plastic, metal, nylon mount frames
  • Good patient handling / informed consent
  • Duplicate lens power for single vision, bifocals and progressives
  • Determine base curve, centre thickness, unwanted prism, segment height
  • Neutralize eyeglasses with single vision, bifocal and progressive lenses
  • Compare parameters with NACOR published tolerance chart
  • Verify whether the eyeglasses meet the tolerances
Bench Alignment / Lens Insertion
  • Bench align frames of various design includling metal, plastic, 4 point rimless and nylon mount
  • Replace lenses into a nylon mount frame
Frame Adjustment
  • Adjust metal, plastic, 4 point rimless and nylon mount frames on a model
  • Demonstrate good patient handling / informed consent
Fabrication Theory
  • Review of blank size calculation and layout problems.

Mode of Instruction
Classroom discussion, hands-on practice.

Reference Material
System for Ophthalmic Dispensing 3rd Edition; C.W. Brooks, I.M. Borish; Elsevier

Promotion Policy

Grading Policy
A+ 90%  to  100%
A 80%  to  89%
B+ 75%  to  79%
B 70%  to  74%
C+ 65%  to  69%
C 60%  to  64%
D 55%  to  59%
F 0%    to  54% (Not a Pass)
EXC Excellent
SAT Satisfactory
UNSAT Unsatisfactory

For further information, see a copy of the Academic Policy, available online (http://www.senecacollege.ca/academic-policy) or at Seneca's Registrar's Offices.

Approved by: Lisa Somers