OPT301 - Dispensing Theory II

Outline info
Last revision date 2018-07-20 13:48:50.287
Last review date 2018-07-20 13:49:03.991

Subject Title
Dispensing Theory II

Subject Description
This subject provides the students with the theoretical foundations for dispensing specialized prescriptions which include high lens powers, presbyopic correction and those for low vision. Lens designs, powers and specific fitting techniques are considered within the framework of practical dispensing applications while emphasizing the professional responsibility of the optician.

Credit Status
One credit toward the Opticianry Diploma Program.

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

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

  1. Analyze various communication methods for interacting with patients and other health care providers.
  2. Discuss advancements in ophthalmic lens designs and their effect on wearer’s visual performance
  3. Describe the accepted fitting protocol for high corrective power lenses
  4. Describe various progressive addition lenses in terms of design, fitting procedures, adaptive response and patient instruction.
  5. Define the concept of free form technology in the manufacturing process of eyeglass lenses
  6. Distinguish between different digital lens measurement systems.
  7. Analyze specialized procedures for dispensing eyewear to children to ensure optimal safety, fit and visual performance.
  8. Discuss the methods for aphakic correction including intraocular lenses, contact lenses and eyeglasses          
  9. Recognize the complexities of vision and aging in providing effective eyewear for the elderly.
  10. Analyze the implications of dispensing appropriate low vision aids based on patient specific needs.
  11. Appraise the quality of vision and ocular health to generate customized vision wear.
  12. Discuss refractive surgery and the implications for post-surgical dispensing of eyeglasses and contact lenses.

Essential Employability Skills
Communicate clearly, concisely and correctly in the written, spoken and visual form that fulfils the purpose and meets the needs of the audience.

Respond to written, spoken, or visual messages in a manner that ensures effective communication.

Execute mathematical operations accurately.

Apply a systematic approach to solve problems.

Use a variety of thinking skills to anticipate and solve problems.

Locate, select, organize, and document information using appropriate technology and information systems.

Analyze, evaluate, and apply relevant information from a variety of sources.

Show respect for diverse opinions, values, belief systems, and contributions of others.

Interact with others in groups or teams in ways that contribute to effective working relationships and the achievement of goals.

Manage the use of time and other resources to complete projects.

Take responsibility for one's own actions, decisions, and consequences.

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.


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

Topic Outline
- The eye as a mirror; accommodation; lenses for special needs
- Correction for presbyopia; bifocal and trifocal lens designs; fitting procedures; troubleshooting
- PLA's (Progressive Addition Lenses) lens designs and fitting procedures
- Fresnel lenses; fitting eyeglasses for vocational needs; lens designs, fitting methods
- Safety requirements and dispensing safety glasses
- Dispensing  eyewear to children; communication and measurements, safety considerations, fitting bifocal lenses for children
- Correction for aphakia; IOL's (Intra Ocular Lenses), contact lenses, eyeglass, visual characteristics of aphakic lenses
- Surgical techniques for visual correction: PRK, Lasik, consideration for post-surgical dispensing
- Fitting and dispensing high prescriptions: fitting method, coatings and  tints, adaptive responses, client instruction
- Low vision assessment: fitting considerations, lens selection, frame adjustments, low vision aids
- Correcting vertical imbalance
- Introduction to contact lenses: correction for astigmatism, instrumentation
- Keratometer and slit lamp: taking K’s, clinical applications, procedures & operation   

Mode of Instruction
 lectures, tutorials, group work, and audio visual presentations.

Prescribed Texts
Systems for Ophthalmic Dispensing 3rd Edition; C.W.Brooks,  Borish; Butterworths

Reference Material

Required Supplies

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
In Seneca College Health Science Programs, a minimum grade of "C" (60%) is required for Promotion.

Class Presentation 15% 
Term Work (2 quizzes @ 10%) 20%
Mid-Term Exam 30%
Final Exam 35%
Total 100%

Students must score a minimum "C" (60%) on the final exam in order to pass this subject.

Testing dates have been pre arranged and are non-negotiable. If a test is missed
students are required to provide documentation  such as a doctor's certificate
stating the illness, along with a written request for a make-up testing privileges
within 7 days following the date of the test. Make-up examinations will be granted
for extenuating circumstances only at the discretion of the appropriate instructor.

Expected English Competencies:

Since this a professional credit subject, marking standards reinforce professional practice by demanding that all written work must demonstrate the
following characteristics for clarity and conciseness:

    writing is consistent with the rules of English grammar
    spelling and punctuation are correct
    appropriate vocabulary  is used
    sentences are structured correctly
    work to flow logically through supporting statements
    work to be arranged in correct format (i.e. reports, essays)

Using another's ideas as one's own, as well as copying directly from books, magazines, reports, and other sources without acknowledgment is plagiarism.
Cheating and plagiarism constitute unacceptable behavior.  Such offenses occur when a student violates the procedures governing the administration of
examinations, tests or other means of evaluating student achievement in a subject or program.

A promotion meeting will be convened to review alleged instances of cheating or plagiarism.

The minimum penalty for a first offense during a student's attendance at the College will be loss of credit of the evaluation involved or a more stringent penalty
consistent with the circumstances.

A second offense may result in the immediate expulsion of the student from the College for the remainder of the current academic semester and two subsequent
academic semesters.

Where there is sufficient evidence to assess a penalty, all relevant information will be maintained in the student's file.  The student has the right to appeal the decision
of the College, consistent with academic policy. 

Approved by: Lisa Somers