CONTACT LENS LABORATORY II
Curriculum guideline
- Laboratory Lecture
- Application / Instrumentation exercises in laboratory
- Independent study of courseware
- Completion of Proficiency Tests
- Completion of Laboratory Assignments
1. Introduction
- Laboratory objectives
- Laboratory hygiene
- Hard and gas permeable equipment
2. Verifying Visual Acuity / Over-Refraction with Contact Lenses
2.1 Trial lens acuity set
2.2 Mathematical calculations
2.3 Verifying spherical lens corrections
2.4 Verifying toric lens corrections
2.5 Verifying presbyopic corrections
2.6 Visual acuity complications
2.7 Referring to Optometrist or Ophthalmologist
3. Hard and Gas Permeable Lens Types, Materials Characteristics, and Fitting Relationship to Ocular Health
3.1 Material compounds
3.2 Material configurations and design
3.3 Lens parameter determination
3.4 Chemical properties of contact lenses
3.5 Manufacturer’s material limitations
3.6 Specialty lens materials
4. Hard and Gas Permeable Lens Solution Properties, Chemical Compounds, and Relationship to Ocular Health
4.1 Chemical Disinfection Systems
4.2 Ultrasonic Disinfection Systems
4.3 Surfactant Cleaners
4.4 Enzyme Cleaners
4.5 Rewetting Agents
4.6 Medically Prescribed Ocular Pharmaceutical Agents
5. Solution Procedures / Specific Function
5.1 Chemical Disinfection Systems
5.2 Ultrasonic Disinfection Systems
5.3 Surfactant Cleaners
5.4 Enzyme Cleaners
5.5 Rewetting Agents
6. Contaminants / Bacteria / Fungus, and Complications to Ocular Health
6.1 Chemical contamination
6.2 Fungus / Bacterial growth
6.3 Protein build up
6.4 Calcium deposits
6.5 Airborne contamination
7. Lens Deformation / Defaults and the Relationship to Fitting Complications
7.1 Minuscule cracks
7.2 Stress cracks
7.3 Lathe cut deposits
7.4 De-Blocking deposits
7.5 Edge deformation
7.6 Curvature changes
7.7 Unsterile cases and solution
8. Hard and Gas Permeable Specialty Materials and Fitting Applications
8.1 Keratoconus lenses
8.2 Astigmatic lenses
8.3 Piggy - Back lenses
8.4 Aphakic lenses
8.5 Pediatric lenses
8.6 Orthokeratology lenses
9. Hard and Gas Permeable Lens Design Analysis and Parameter Modification
9.1 Monocurve tooling
9.2 Bicurve tooling
9.3 Tricurve tooling
9.4 Blending
9.5 Edge contouring
9.6 Prism Ballast lenses
9.7 Truncating
9.8 CN bevelling
9.9 Toric lens tooling
9.10 Polishing
Upon successful completion, the student will be able to:
1. Demonstrate progressive competency with the use of the following instruments for hard and gas permeable contact lens fitting and analysis:
Slit Lamp Biomicroscope Keratometry Lensometry
Profile Analyzer Hand Loop Diameter Gauge
Vertex Conversion Chart Dioptric Conversion Chart Radiuscope
Acuity Charts Acuity Trial Lens Set
Modification Bucket Modification Tools
2. Demonstrate skills and knowledge through use of instrumentation on hard and gas permeable contact lens materials, and the relationship to fitting applications.
3. Demonstrate knowledge of hard and gas permeable lens materials to the design and modification of specialty lens applications.
4. Evaluate material and fitting characteristics of hard and gas permeable lenses based on knowledge of chemical properties and characteristics of contact lens materials.
5. Identify imperfections of hard and gas permeable lens materials, recognize the probable cause, and identify the resolution.
6. Recall knowledge of hard and gas permeable lens materials by manufacturer, label name, material compound names, surface wetability, power range and recommended patient fitting procedure and wearing schedule.
7. Recall knowledge of hard and gas permeable lens disinfection systems, lens storage solutions, surfactant cleaning solutions, enzyme cleaners, rewetting agents, and medically prescribed pharmaceutical agents.
8. Recall knowledge of hard and gas permeable lens solutions by manufacturer, brand name, chemical ingredients, recommended usage.
9. Analyze effective and non-effective solutions by contact lens surface examination.
10. Perform hard and gas permeable lens parameter modifications by instrumentation.
11. Recall knowledge of over-refraction techniques for verification of patient’s visual acuity.
Evaluation of the course will be based on the course objectives in accordance with Douglas College policies. Evaluation methods will include written, oral and clinical assignments.
1. Completion of laboratory exercises 30%
2. Midterm exams 30%
3. Final exam 30%
4. Completion of proficiency test 10%
Textbooks and Materials to be Purchased by Students
Efron, Contact Lens Practice, (Latest Edition) Butterworth-Heinemann
Douglas College Courseware