6 Parts of the Lensometer to know for the ABO?
Focusing Ring, Lens/Frame Table, Power Drum, Axis Wheel, Prism Compensation, Lens Clamp
Name 11 Instruments and Dispensing Tools
- Millimeter Rule(PD Stick)
- Thickness Caliper
- Lens Measure Clock (Lens Clock)
- Distometer
- Lens Boxing Device
- Lensometer
- Polariscope
- Heat Treating
- Chemical Tempering
- Drop Ball Tester
- Hand Tools
What are Mires?
The lines you see in a lensometer
What is the Reticle in a Lensometer?
The circular target that the mires sit on
Which Mires represent the Sphere target?
the 3 lines spaced closely packed together
Which Mires represent the Cylinder target?
the 3 lines spaced far apart
What are the 3 steps to focus the lensometer before use?
- Turn Eyepiece counterclockwise
- Rotate power drum to 0 (plano)
- Rotate Eyepiece clockwise until 2nd circle of reticle is clear
What does ASTM stand for?
American Society for Testing Materials
When was the ASTM established, and what is it’s function?
- Primary function is to set standards for sports related products such as eye protection.
What does ANSI stand for?
American National Standards Institute
When was the ANSI established, and what does it do?
- Non Governmental agency whose function is to establish standards for a wide variety of industrial and commercial interests. It also sets the parameters or tolerance level for product quality.
What is Standard Z80.11987?
the recommendations for prescription ophthalmic lenses.
What does OSHA stand for?
Occupational Safety and Health Administration
What is OSHA and when was it established?
Established 1971. A division of the US dept. of Labor whose primary function is to reduce the incidence of job-related illness, personal injury and death in the workplace resulting from substandard or unhealthy conditions.
What does FDA stand for?
Food and Drug Administration
What is the FDA?
a division of the US Dept. of Health, Education and Welfare. It’s function is to enforce laws relating to purity, standards, branding and labeling of foods, drugs and cosmetics.
Are contacts and glasses subject to regulations of the FDA? Why or why not?
yes. they are considered medical devices and are therefore subject to their regulations.
What does FTC stand for?
Federal Trade Commission
When was the FTC established and what does it do?
- it is an agency of the US Government that enforces Federal laws against unfair trade practices such as price-fixing or false advertising claims
