OPT305 - Eyeglass Fabrication II

Outline info
Last revision date 2018-04-11 08:29:03.868
Last review date 2018-04-11 08:29:15.24

Subject Title
Eyeglass Fabrication II

Subject Description
This subject expands on the theory and practice included in Eyeglass Fabrication Lab I and introduces students to finishing segmented bifocal and progressive lenses. Through tutorial and hands-on practice, students to become proficient in finishing spectacles at an advanced level.

Credit Status
One credit toward the Opticianry Diploma.

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

1. Use a clock gauge to determine the base curve of multifocal lenses, the physical location of cylinder, and lens warpage.

2. Use the lensometer to neutralize and spot multifocal lenses.

3. Lay out and block multifocal lenses.

4. Finish segmented bifocal and progressive power lenses according to specifications into a variety of frame styles.

5. Insert multifocal lenses into specialized frames correcting any misalignment or distortion.

6. Verify finished spectacles with the work order and the Standard Lens Tolerances.

7. Discuss procedures for hand edging lenses.

8. Check the overall appearance of finished eyeglasses and complete a bench alignment.

9. Package and store spectacles in preparation for delivery to client.

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.

Eyeglass Fabrication l (OPT204)

** It is the responsibility of each student to ensure the course prerequisites have been met. Failure to do so may jeopardize your credit. 

Topic Outline

  • Review of lens neutralization and clock gauge.
  • Layout and blocking; decentration and sizing requirements.
  • Finishing Lenses for specialty frames.
  • edging bifocal lenses
  • Edging progressive addition lenses.
  • Hand edging for special mountings
  • Lens verification and standard tolerances.
  • preparing the order for delivery to the dispensary.
  • Students will follow activities scheduled in the OPT305 Study Guide. 

Mode of Instruction
 Lecture, demonstration followed by practice

Prescribed Texts
 Essentials of Ophthalmic Lens Finishing, Clifford W. Brooks; Butterworth-Heinemann.

Required Supplies
Students are required to bring the following tools to all classes and examinations:

P.D. ruler
Pen light
Clock gauge

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%
D 50%  to  54%
F 0%    to  49% (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.

Modes of Evaluation
A minimum grade of 60% is required for promotion in Health Sciences Programs.

Practical Assignments 40%
Quiz  10%
Final   50%
Total  100%

The final grade for this course will be designated as follows SATISFACTORY/UNSATISFACTORY

*As lens neutralization is a critical skill, no marks will be given for lenses recorded at 90 degrees off axis on tests or examinations.
**Students must have 70% on finishing portion and 80% on lensometer portion of the final exam for a grade of SATISFACTORY to be assigned. 

Approved by: Lisa Somers