OPT306 - Advanced Eyeglass Dispensing Theory

Subject Title
Advanced Eyeglass Dispensing Theory

Subject Description
This subject provides the students with the theoretical foundations for dispensing and managing
specialized prescriptions, which include high prescriptions, occupational lenses, safety wear and
sun wear. Lens designs, powers, advanced measuring devices and specific fitting techniques
required to customize vision wear are considered within the framework of practical dispensing.
Particularities of dispensing eyewear to children and elderly are discussed and emphasis is
placed on the professional responsibility of the optician to assure patient continuous care and
satisfaction.

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 high corrective power lenses and determine their effect on vision and image
magnification.
1.1 Present the visual characteristics of high plus lenses.
1.2 Identify types of high plus power ophthalmic lenses including lenses used for aphakic
correction.
1.3 Identify the limitations of high plus lenses.
1.4 Highlight the importance of UV protection for aphakic patients.
1.5 Discuss cataract spectacles in aphakic correction in terms of advantages,
disadvantages, lens design and retinal image magnification.
1.6 Discuss procedures of fitting high plus powers.
1.7 Present visual characteristics of high minification lenses.
1.8 Identify types of high minus power ophthalmic lenses.
1.9 Discuss procedures for fitting the high minus prescription:
1.10 Relate aspheric and atoric lens designs in terms of fitting techniques.
1.11 Connect variables, which affect magnification.
1.12 Present the fitting implications of panthoscopic tilt, retroscopic tilt and wraparound.
1.13 Discuss the effect on image magnification in high-powered prescriptions.
1.14 Discuss aniseikonic correction.
1.15 Discuss adaptive response and patient education.
1.16 Present the theory of Fresnel lenses and prisms and applications for their use.
1.17 Discuss adapting response and patient education on eyeglass wear and care.

2. Demonstrate the effect of lens thickness on eyeglasses overall appearance and lenses
performance.
2.1 Discuss factors which influence the overall eyeglass appearance and methods of
correction.
2.2 Discuss frames and lens options, which will minimize the effect of lens thickness.
2.3 Use formulas to calculate the edge thickness of high minus lenses.
2.4 Use formulas to calculate the center thickness of high plus lenses.

3. Analyze the importance of customized vision wear in preserving ocular health and vision
quality.
3.1 Define safety and vocational lenses.
3.2 Discuss the purpose of wearing customized eyewear.
3.3 Recognize the need for eye protection in environments where potential eye hazards
are.
3.4 Recognize occupations and hobbies with a high risk for eye injuries.
3.5 Discuss prescription and non-prescription protective eyewear options for vary
occupations.
3.6 Explain appropriate applications of lens materials for safety eyewear.
3.7 Discuss lenses impact resistance tests requirements.
3.8 Explain the effects of lens coatings and surface scratches on impact resistance.
3.9 Explain the requirements for occupational safety eyewear.
3.10 Discuss fitting particularity of safety eyewear.
3.11 Specify the regulations in place for the dress, safety and sports eyewear.
3.12 Discuss first aid in eye emergencies caused by injury and exposure to radiations and
chemicals.
3.13 Recognizing situations where occupational wear is required.
3.14 Specify occupations where performance is enhanced with the use of vocational
bifocals, trifocals or progressive addition lenses
3.15 Present alternative lens designs and Rx power modifications, which meet occupational
intermediate distance vision needs.
3.16 Explain occupational multifocal lens designs.
3.17 Discuss occupational progressive lenses
3.18 Discuss fitting particularity of occupational eyewear
3.19 Discuss the particularities of eyeglasses for sports
3.20 Identify potential eye hazards of paying vary sports
3.21 Discuss lens and frame options requirements for sports eyewear.
3.22 Discuss the importance of precise measurements and fit requirements for the
individual active wearer
3.23 Specify appropriate eyewear for various sports.

4. Discuss procedures for pediatric dispensing to ensure optimal safety, fit and visual
performance.
4.1 List special considerations for dispensing to children.
4.2 Discuss the high incidence of increase myopia in children and myopia control options.
4.3 Discuss spectacle methods used to slow the progression of myopia.
4.4 Discuss myopia control management.
4.5 Identify the risk factors related to sports, ocular injuries and damage to the young eye
from UV exposure.

5. Asses the complexities of vision and aging to provide functional vision for the elderly.
5.1 Explain eyewear options addressing the normal age-related changes in vision.
5.2 Explain changes in visual function in the normal, healthy aging eye.
5.3 Recommend appropriate corrective lens materials and designs for the older adult.
5.4 Specify the importance of protecting the aged eye from glare and UV radiation.
5.5 Recommend appropriate frame materials and styles for fitting the older adult.

6. Outline the follow-up and continuous care protocols for eyewear.
6.1 Explains to the patient prior to dispensing the proper use and care of eyewear.
6.2 Prepare continuous care plan for the patient to assure eyeglasses are functioning as
expected.
6.3 Perform a fit revaluation at the follow-up visit

7. Examine cases of advanced eyewear dispensing and make appropriate recommendations
for patients.
7.1 Present specific cases of high Rx dispensing and make recommendations for lenses,
frames, vertex distance, compensation, tilt and wrap.
7.2 Present dispensing situations related to fitting children and make appropriate
recommendations for frames and lenses.
7.3 Present dispensing situations related to fitting safety eyeglasses and choose frames
and lenses specific to each occupation.
7.4 Present dispensing situations related to fitting sports eyeglasses and select
appropriate frames and lenses specific to very physical activities.
7.5 Present post-surgical eyeglass dispensing options.

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