CONTACT LENS CLINICAL DISPENSING II
Important Notice
This course is not active. Please contact Department Chair for more information.
Overview
1. Introduction
- Clinical Objectives
- Clinical and personal hygiene
2. Instrumentation
Slit Lamp Biomicroscope Keratometry Lensometer
Profile Analyzer Hand Loop Diameter Gauge
Vertex Conversion Chart Dioptric Conversion Chart Radiuscope
Snellen Chart Acuity Trial Lens Set
3. Prefit Evaluation / Hard and Gas Permeable Contact Lenses
3.1 Advanced Ocular Anatomy and Physiology
Cornea Structure Conjunctiva Lid Structure
Tear Film Lashes Crystalline Lens
Iris Pupil Sclera
3.2 Advanced Ocular Pathology
Conjunctivitis GPC Blepharitis
Exophthalmos Keratoconus Keratitis sicca
Neovascularization Pterygium Pinguecula
Aniridia Corneal Edema Corneal Ulcers
Bullous Keratopathy Corneal Dystrophies
3.3 Abnormalities Affecting Hard and Gas Permeable Lens Wear
Alcohol Drugs Diabetes
Arthritis Herpes Thyroid
Ocular Medication Systemic Disease Allergies
3.4 Lifestyle Considerations for Hard and Gas Permeable Lens Wear
Athletics Work Environment Climate
Cosmetic Social Age
3.5 Interpreting Refractive Errors for Hard and Gas Permeable Lenses
Myopia Hyperopia Presbyopia
Aphakia Amblyopia Strabismus
Astigmatism Aniseikonia Exotropia
Esotropia Pseudophakia Anisometropia
3.6 Advanced Corneal Defects / Deformities / Injuries
Keratoplasty Albinism Nystagmus
Coloboma Retinopathy Radial Keratometry
Laser Surgery
4. Determine Lens Type / Lens Design / Hard and Gas Permeable Lenses
4.1 Hard and Gas Permeable Lens Configuration and Design
Aspheric Front Toric Back Toric
Bi-Toric Prism Ballast Keratoconus
Presbyopic Design Aphakic Design Cosmetic Design
Lenticular Myoflange Lenticular Hyperflange
4.2 Determination of Hard and Gas Permeable Lens Parameters
Base Curve Diameter Edge Design
Thickness Vertex Power
Apical Posterior Curve Posterior Peripheral Curve
4.3 Chemical Properties / Relation to Pre-Fit Evaluation
Oxygen Permeability Transmissibility Durability
Thermal Conductivity Surface Wetting Stability
4.4 Lens Material Characteristics / Relation to Pre-Fit Evaluation
Prescription Limitation Design Limitations
Specific Gravity Colour Tinting
Manufacturing Limitation
5. Solution Compatibility / Hard and Gas Permeable Lens Materials
5.1 Chemical Disinfection Systems
5.2 Ultrasonic Disinfection Systems
5.3 Surfactant Cleaners
5.4 Enzyme Cleaners
5.5 Rewetting Agents
6. Fitting Procedure / Hard and Gas Permeable Lenses
6.1 Procedure for Specific Lens Types
Daily Wear Extended Wear
Therapeutic Investigational
6.2 Procedure for Specific Patient Application
Myopia Hyperopia Astigmatism
Presbyopia Aphakia Esotropia
Exotropia Therapeutic Pediatric
7. Patient Instruction / Delivery Procedure
7.1 Patient Instruction / Verbal and Written
- Patient hygiene
- Insertion and removal techniques
- Alternate insertion and removal techniques
- Emergency responses to patient insertion and removal techniques
7.2 Patient Post Insertion / Removal Procedure
- Movement / Centration / Stability
- Burning / Itching / Stinging
- Presence of a foreign body
- Visual acuity
7.3 Hygiene for Hard and Gas Permeable Lens Care
- Chemical Disinfection Systems
- Ultrasonic Disinfection Systems
- Surfactant Cleaners
- Enzyme Cleaners
- Rewetting Agents
7.4 Lens Sensitivities / Contamination
- Chemical contamination
- By-Product contamination
- Airborne contaminations
- Allergy reactions
- Systemic reaction
- Medication reaction
8. Patient Follow-up Care / Evaluation
8.1 Instrumentation Diagnosis
a) Keratometry
- Post Lens fitting observation
- Objective diagnosis
- Corneal compatibility
b) Slit Lamp Biomicroscope
- Ocular anatomy
- Ocular physiology
- Lens fitting evaluation
- Corneal compatibility
- Objective diagnosis
- Fluorescein pattern evaluation
c) Phoropter / Trial Lens Set
- Visual acuity verification
8.2 Aspects of Evaluation / Corrective Measures
Movement Centration Stability
Steep Lens Flat Lens Damaged Lens
Corneal Molding Corneal Edema Infection
Neovascularization Corneal Staining Foreign Body
Conjunctival Staining Allergic Ocular Response
Systemic Ocular Response
8.3 Follow-up Protocols / Hard and Gas Permeable Lens Types
Aspheric Front Toric Back Toric
Bi-Toric Prism Ballast Keratoconus
Presbyopic Aphakic Cosmetic
8.4 Follow-up Protocols / Solution Compatibility
- Allergic ocular response
- Systemic ocular response
- Daily wear materials
- Extended wear materials
- Therapeutic / Pediatric materials
8.5 Follow-up Protocols / Specific Patient Types
- Routine
- Apprehensive
- Psychologically unstable
- Post Surgical
- Lecture
- Clinical exercises in the dispensary
- Independent study of procedures
- Completion of independent evaluation
- Completion of assignment
Evaluation of the course will be based on the course objectives in accordance with Douglas College policies. Evaluation methods will include written, oral and practical examination.
1. Completion of clinical fittings 30%
2. Midterm Exam 30%
3. Final Exam 30%
4. Completion of Proficiency test 10%
Upon successful completion, the student will be able to:
1. Obtain a general history from the patient through discussion to determine visual, physiological, pathological problems, and activity needs of the patient.
2. Review and compare past and current ocular status and assess suitability for lens wear, and determine what diagnostic activities must be conducted to complete evaluation.
3. Use instrumentation and other provisional methods to determine appropriate hard and gas permeable contact lens types and designs.
4. Interpret patient refractive error and keratometry readings by analyzing a written prescription and accumulated information to meet patient’s needs.
5. Discuss hard and gas permeable contact lens options with the patient as related to the ocular status and prescription.
6. Apply knowledge of hard and gas permeable lens materials, characteristics, and physiology to maintain ocular integrity and visual requirement of the patient.
7. Conduct a diagnostic evaluation by inserting a trial lens and evaluating objective findings to determine appropriate design and fitting relationship.
8. Determine aggregate lens parameters from the diagnostic fitting and patient subjective responses and order contact lenses by specific lens parameters to achieve optimal fit and visual acuity.
9. Educate the patient by providing verbal and written instructions and hands-on practice of hard and gas permeable lens insertion / removal procedures.
10. Educate the patient by providing verbal and written instructions and hands-on practice of hard and gas permeable lens care and hygiene.
11. Determine the patient’s subjective responses to contact lens wear by follow-up examination to evaluate appropriateness of lens comfort, material and solution compatibility and visual acuity.
12. Evaluate contact lens fit by observation using instrumentation, diagnostic tools, and empirical methods and determine objective findings.
13. Make necessary modifications of lens parameters, lens materials and / or lens solutions to improve fitting characteristics, ocular health, patient compliance, and visual acuity.
14. Verify visual acuity by over-refraction using instrumentation, diagnostic tools, and mathematical calculation.
15. Reinforce to the patient the necessity of follow-up examination for compliance, evaluation, contact lens care, hygiene and handling protocols.
Textbooks and Materials to be Purchased by Students
Efron, Contact Lens Practice, (Latest Edition) Butterworth-Heinemann
Stein-Slatt-Stein, Fitting Guide for Rigid and Soft Contact Lenses, (Latest Edition) C.V. Mosby Co.
Requisites
Course Guidelines
Course Guidelines for previous years are viewable by selecting the version desired. If you took this course and do not see a listing for the starting semester / year of the course, consider the previous version as the applicable version.
Course Transfers
These are for current course guidelines only. For a full list of archived courses please see https://www.bctransferguide.ca
| Institution | Transfer details for DOPT 2510 | |
|---|---|---|
| There are no applicable transfer credits for this course. | ||