National Vision Week is fast approaching. So here is a test of vision knowledge.....

Lens Trivia Quiz

1. Roman Emperor Nero viewed the Gladiator games through lenses. Which gem was used to make these lenses?

Ruby Emerald Diamond Sapphire

2. Although historians have pinpointed the late 13th century as the likely time spectacles were first invented they don't know who the inventor was, just his nationality. Which nationality was he?

English French German Italian

3. Counterfeiting or "lens bait and switch" has been going on since the 14th century. Which lens material was substituted for the more valuable rock crystal?

Diamonds Glass Plastic Lead

4. In the 14th century, eyeglasses were an extravagant statement of wealth and power. Which class of people were not among the privileged to benefit from the use of spectacles?

Clergymen Noblemen Royalty Blacksmiths

5. What invention spurred the wide use of reading glasses?

Weaving Machines Guttenberg's Printing Press Glass Blowing Dyecasting

6. Determining the right lens for the given eyeglass wearer was an arduous task. In the early 17th century the first graded lenses were invented. What nationality were the inventors?

Italian German French Spanish

7. Historical sources indicate that the concept of combining both distance and near lenses into one set of eyeglasses was invented around 1775. Who was the likely first inventor?

Benjamin Franklin Henry Morse Samuel Pierce Thomas Mann

8. Which U.S. President created a major public relations coup for an Ophthalmologist whose waiting room became packed with wanna-be patients as a result?

Andrew Jackson George Washington Thomas Jefferson Samuel Adams

9. Which invention, in 1926, created as much a need for distance-seeing eyeglasses as the Gutenberg Printing Press had for reading or close-up seeing spectacles 470 years earlier?

Telephone Television Movie Camera Automobiles

10. The U.S. Food and Drug Administration instituted the industry's first test mandating that all eyeglass lenses pass a minimum level of shatter-resistance to insure public eye safety. What was that test called?

Spectroscopy Crash Testing Drop Ball Test Thermoanalysis


If you need the answers, just drop us an email to

Does your job give you headaches?

In the course of our complete ergonomic analysis, one of the most common complaints I hear and see on our Risk Assessment software is eyestrain. Computer activity involves continuous focusing and excessive close up work. This visual activity is quite demanding for even just an 8 hour day. And constant one point focusing becomes more difficult as we go from our twenties to our thirties and enter our forties. To further contribute to your eyestrain is sun's glare.
So with the help of Transitions Optical; we've put together a simple 7 question test to answer the question: Does your job give you headaches?

For each of the questions you'll be asked to reply on a scale of 0 - 5. 0 represents never and 5 often How often do you?

Use a computer? 0 1 2 3 4 5
Focus on small objects? 0 1 2 3 4 5
Write or make math calculations extensively? 0 1 2 3 4 5
Go from indoor light to outdoor light in a short period of time? 0 1 2 3 4 5
How often are you exposed to?
Outdoor lights? 0 1 2 3 4 5
Fluorescent light? 0 1 2 3 4 5
Bright indoor lights? 0 1 2 3 4 5
Computer monitor? 0 1 2 3 4 5

How often do you experience blurred vision? 0 1 2 3 4 5
How often do you experience "tired eyes? 0 1 2 3 4 5
How often do your eyes experience soreness or irritation ? 0 1 2 3 4 5

How often do you perform the following leisure activities?
Read 0 1 2 3 4 5
Write 0 1 2 3 4 5
Paint 0 1 2 3 4 5
Collect coins/ stamps 0 1 2 3 4 5
Watch television 0 1 2 3 4 5
Read music 0 1 2 3 4 5
Bowl 0 1 2 3 4 5
Golf 0 1 2 3 4 5
Play tennis 0 1 2 3 4 5
Fish 0 1 2 3 4 5

Now add up your score.
If your total score is less than 40 you are at a low level of task difficulty.
A score between 40 and 59: you are beginning to experience some visual performance interference
A score between 60-79; you are probably regularily experiencing visual difficulty.
Any score over 80 means your eyes have trouble on a regular basis.
You can contact our office at 708-686-5266 to discuss our expert recommendations for resolving your visual difficulties and problems.

Vison Xperts

Thank you for your interest in our professional services and quality materials. Prescription safety eyewear is that unique piece of industrial equipment which must be customized to the needs of each individual employee. Appearance, comfort, and personal style are some of the factors which affect the employee's compliance in use of their appropriate eye protection. One of our specialties is the presbyopic requirements of the computer user. We take pride in providing you with only the very best of eye care. Below you will see just a partial list of the OSHA approved eyewear and lenses Vision Xperts provides. Your employees may select the frames from the convenience of your facility. Our staff will assist your employees in the selection, proper measurements, and design of the their eyewear. The protective eyewear available through Vision Xperts is designed to satisfy:

All standards and requirements for which your Safety Director is accountable
Reasonable costs required by your Purchasing Agent
Only the highest quality

Frame Manufacture Lines Carried:

On Guard and American Optical
Liberty Optical

First quality lens materials used:
CR 39
High Index
Progressive bifocals of all types and categories for industrial and computer users
Transition lenses

Plano and Prescription Sunglasses
Our Vision Xperts division in addition to OSHA approved eyewear; carries the latest styles in sunwear. Our Soleil Collection features styles from a variety of manufacturers. For pricing and ordering information contact me at 708-686-5266.

If you are exploring custom vision programs which encompass preventive eye health; I would welcome the opportunity to personally discuss these services with you. You may contact me at our VDT Solution division office 708-686-5266 or by email at

Designing the perfect lens by Duane A. Perkinson

You wear glasses. You use a computer. You need the right pair of glasses to do your job. What's the correct formula for your glasses purchase?

My ergonomic premise for people wearing glasses is:
If a person is having difficulty viewing the screen; ultimately they will compensate by bending closer, leaning to one side, tilting their head, etc. These body actions eventually lead to physical complaints in the neck, shoulders, or progress to other physical difficulties. With all the different lens options for the consumer to choose from - there may not be one lens for every wearer. But I believe a basic lens design is perfect for every computer user who wears glasses. My professional recommendation is a Transitions lens made in a polycarbonate material.

This lens is ideal for it's lightweight and thin so it works for most prescriptions. The polycarbonate material already has an ultraviolet filter "built in". You don't need to pay for any extras. The Transitions option does a great job with glare in the office and the car. The three bifocals I recommend to computer users are also available. Our Vision Xperts division recommends this basic lens design for the OSHA approved eyewear we provide through our vision safety programs.

The Transitions brand photosensitive formula far exceeds its competitors in these key features:
Activation rate: how quickly the lens reacts
Fade rate: equally important the time it takes the lens to lighten
Color: quality of the hue molecular structure
Transmittance levels: how well you can see through the lens indoors and out side
Life of the product: your prescription will probably lose its effectiveness for you before this
lens "wears out"

So if you want to avoid some ergonomic problems before they begin, please share our recommendaion with your staff, coworkers, and friends too.

If you would like more detailed information I invite you to call our office at 708-686-5266. You can visit the Transition web site at You may read my original review of the Transitions lens from December '95 on our archives page

VDT Solution main page / VDT Services / Ergonomic Guide / Product Reviews / Healthy Computer Newsletter

Vision Xperts / Preferred Resources / Carpal Tunnel / Speaking & Presentations / Archives / Fact$ / Free Risk Software


The Bureau of Labor statistics estimates business incur an annual cost approaching one billion dollars due to occupational eye injuries.

To test your safety consciousness you are I invite you to take a little True / False quiz :

1. Safety glasses that have scratches or pits still provide adequate eye protection?

2. Face shields provide adequate eye protection by themselves?

3. Lens materials are available for safety glasses today in glass, plastic, or polycarbonate? All lens materials are about the same?

4. Contact lenses qualify for eye protection on the job?

5. Since all prescription lens are made impact resistant, your everyday glasses are safe to wear on the job?

6. Computer work doesn't require special lenses?

7. Safety eyewear is available for protection at home?

8. Safety frames are available in the latest styles and high tech materials?

9. Safety glasses are uncomfortable?

For all the answers send me an email