OPT303 - Contact Lens Theory I

Outline info
Last revision date 2017-11-21 11:33:22.003
Last review date 2017-11-21 11:33:26.226

Subject Title
Contact Lens Theory I

Subject Description
This subject is designed to foster students' understanding of the methodologies used for contact lens fitting and dispensing. Students are introduced to dynamics and properties of contact lens materials, methods of manufacture and optics. Contact lens instruments and fitting theories are included.

Credit Status
One credit toward the Opticianry Diploma Program

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

1. Describe the history, design and the evolution of contact lens materials.

2. Describe the various techniques used to manufacture contact lenses.

3. Compare and contrast the classifications and properties of contact lens materials.

4. Explain the mechanics and function of various contact lens fitting instruments.

5. Correlate the principles of visual and applied optics to contact lens fitting.

6. Summarize the principles and procedures for fitting soft and rigid gas permeable contact lenses.

7. Explain the goals of contact lens fitting and the professional responsibilities of the practitioner.

8. Identify the essential components of a full client assessment for successful contact lens fitting.

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.

OPT200 and OPT300

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

Contact Lens Lab I - OPT304

Topic Outline
- Contact lens history and evolution
- Converting radius of curvature in mm to diopters
- Classification of contact lenses
- Vertex distance compensation
- Astigmatism  and contact lenses
- Corneal health requirements for successful contact lens fit
- MOR (Manifest Over Refraction) and contact lens fitting
- Various fluoroscein patterns
- Gullstrand's Schematic Eye
- RGP lenses
- Calculating residual astigmatism in RGP lens fitting
- Introduction to soft lenses
- Client history taking
- Symptomatology and refitting contact len patients
- Spectacle magnification calculation
- Extended wear lenses
- Relative spectacle magnification calculation

Mode of Instruction
Students are responsible for studying the prescribed chapters in the text book. Class activities will enhance the materials in the text.
The class format will include lectures, film/videos, mini exercises, case studies from the test, and assignment presentations.

Prescribed Texts
1.  Contact Lens  Practice, Nathan Efron 2nd Edition; Elsevier

2.  Contact Lens Complications, Nathan Efron 2nd Edition ; 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%
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.

Term Work 25%
Product Knowledge Class Presentation 10%
Mid-Term Exam  30%
Final Exam    35%


Students must score a minimum "C" (60%) on the final exam 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.
Cheating and Plagiarism:
Using another's ideas as one's own, as well as copying directly from books, magazines, reports, and other sources without acknowledgement is plagiarism.
Cheating and plagiarism constitute unacceptable behaviour.  Such offenses occur when a student violates the procedures governing the adminstration of examination,
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 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.
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)

Approved by: Lisa Somers