|
Standard |
Posted: 03/17/08
|
R State Standard £ Institutionally
Developed College: N/A |
OPD
106 – Optical Laboratory Techniques I
Course
Description
Introduces
students to the operations involved in lens fabrication. Emphasis is placed on
gaining knowledge of equipment requirements and developing surfacing and
finishing techniques. Topics include: safety and environmental procedures and lens
processing terminology; lens surfacing and finishing equipment; lens blank
selection and layout; lens surfacing techniques; lens finishing techniques; lens
final insertion and mounting techniques; and standard alignment and inspection
of lenses.
|
Competency Areas |
Hours |
|
|
Safety
and Environmental Procedures and Lens Processing Terminology |
Class |
4 |
|
Lens
Surfacing and Finishing Equipment |
D.
Lab |
2 |
|
Lens
Blank Selection and Layout |
P.
Lab/O.B.I. |
9 |
|
Lens
Surfacing Techniques |
Credit |
8 |
|
Lens
Finishing Techniques |
|
|
|
Lens
Final Insertion and Mounting Techniques |
|
|
|
Standard
Alignment and Inspection of Lenses |
|
|
|
Prerequisite: |
Provisional
admission |
|
Corequisite: |
|
|
Course
Guide |
|
Competency |
After completing
this section, the student will be able to: |
Hours |
||
|
Class |
D.Lab
|
P.Lab/ O.B.I. |
||
|
Safety
and Environmental Procedures and Lens Processing Terminology |
5 |
0
|
5 |
|
|
Safety |
Describe
safe practices to include environmental procedures. |
|
|
|
|
|
Practice
safety measures to include environmental procedures. |
|
|
|
|
Fabrication |
Name
the two types of facilities associated with optical lens fabrication. |
|
|
|
|
Blanks |
Explain
the difference between plus and minus lenses. |
|
|
|
|
Grinding |
Define
lens grinding as it applies to the field of ophthalmic dispensing. |
|
|
|
|
|
Define
the terms lens axis, centration, blocking, deblocking, and edging as they
apply to the finishing process. |
|
|
|
|
|
Discuss
the flow chart that outlines the lens processing sequences. |
|
|
|
|
Special
features |
Explain
the meanings of the special features harding, color coating, impact
resistance testing, and glazing as they apply to glass lenses. |
|
|
|
|
LENS SURFACING AND FINISHING
EQUIPMENT |
5 |
1 |
4 |
|
|
Lensmeter |
Describe
how the lensmeter is used to verify during the surfacing process. |
|
|
|
|
|
Name
other terms for a lensmeter. |
|
|
|
|
|
Verify
sphere cylinder lenses using the lensmeter. |
|
|
|
|
|
Describe
the lens spotting process using the lensmeter. |
|
|
|
|
Autolensmeter |
Describe
the purpose of the autolensmeter. |
|
|
|
|
|
Describe
the use of the autolensmeter for lens spotting. |
|
|
|
|
Lens
protractor |
Name
the instrument used to provide a graph grid and degree reference for lens
making. |
|
|
|
|
Hand
layout |
Describe
the hand layout equipment used for lens surfacing. |
|
|
|
|
Blocker |
Describe
the operation of a blocker as used in lens fabrication. |
|
|
|
|
Reclaim
tank |
Describe
the operation of a reclaim tank as used in lens fabrication. |
|
|
|
|
Lens
generator |
Describe
the operation of a lens generator as used in lens fabrication. |
|
|
|
|
Edger |
Describe
the operation of a manual bevel edger as used in lens fabrication. |
|
|
|
|
|
Describe
the operation of an automatic edger as used in lens fabrication. |
|
|
|
|
LENS BLANK SELECTION AND LAYOUT |
5 |
2 |
18 |
|
|
Curve
calculation |
Describe
the procedure used to calculate a curve for lens fabrication. |
|
|
|
|
Lens
thickness |
Discuss
important factors in lens selection for the fabrication process. |
|
|
|
|
Decentration
of lenses for surfacing |
Contrast
the boxing and datum systems of decentration. |
|
|
|
|
Layout
lens |
Layout
a lens for surfacing. |
|
|
|
|
LENS
SURFACING TECHNIQUES |
10 |
2 |
18 |
|
|
Block
lens |
Block
a lens for surfacing. |
|
|
|
|
Generating
lens |
Surface
a blocked lens. |
|
|
|
|
Fining
lens |
Prepare
a rough cut lens for polishing using the fining process. |
|
|
|
|
Polishing
lens |
Polish
a lens that has gone through a fining process. |
|
|
|
|
LENS
FINISHING TECHNIQUES |
5 |
5 |
18 |
|
|
Calculating
lens shape |
Calculate
lens measurements for finishing. |
|
|
|
|
Decentration
for finishing |
Describe
the decentration process as applied to lens finishing. |
|
|
|
|
Pattern
sets |
Measure
frame difference for pattern sets. |
|
|
|
|
Calculation
of lens size |
Determine
pattern size using calculations based on frame difference. |
|
|
|
|
Checking
pattern |
Determine
accuracy of lens pattern for selected frame. |
|
|
|
|
Edger
setting |
Set
edger for selected lens pattern. |
|
|
|
|
Edging |
Edge
lenses for selected frame. |
|
|
|
|
Shape
changes |
Discuss
the procedure used to re-edge a lens for a different frame. |
|
|
|
|
Lens
Final Insertion and Mounting Techniques |
5 |
1
|
9 |
|
|
Zyl
frame |
Describe
the procedure used to insert a lens into a zyl frame. Insert
lens into a zyl frame. |
|
|
|
|
Adapting
zyl frames |
Describe
the procedure used to adapt a zyl frame for smaller size lenses. |
|
|
|
|
Adjusting
lens position |
Describe
the procedure for correcting a twisted lens. |
|
|
|
|
|
Describe
the procedure used to check alignment of bifocal lenses after insertion in a
frame. |
|
|
|
|
Standard
Alignment and Inspection of Lenses |
5 |
9
|
18 |
|
|
Surface
quality |
Demonstrate
the procedure used to verify quality of the front and back surfaces of a
lens. |
|
|
|
|
Internal
characteristics |
Demonstrate
the procedure used to verify the quality of the internal characteristics of a
lens. |
|
|
|
|
Waviness |
Demonstrate
the procedure for detecting waviness in uneven lens surfaces. |
|
|
|
|
Power
verification |
Verify
lens power using a lensmeter. |
|
|
|
|
Prism |
Determine
if lens prism agrees with prescription. |
|
|
|
|
OC
versus MRP |
Determine
the optical center and major reference point of a lens. |
|
|
|
|
Suggested
Resources |
Brooks, C. F. (1983). Essentials for Ophthalmic Lens Work.
Brooks, C. F., & Borish,