Competency 4.1.4

Question 1

Forms of Protective Eyewear

Answer 1

• spectacles,
• goggle
• shields

Question 2

How is suitability of Safety Eyewear Established?

Answer 2

• working environment is often risk assessed by a safety officer who is able to assess the needs of a safety spectacle which may result in a material and frame being specified on the voucher
• if the patient is e.g. self employed then a comprehensive risk assessment should be undertaken

Question 3

Energy Impact Spectacle Markings

Answer 3

A - High energy impact
B - Medium energy impact
F - Low energy impact
S - Increased robustness
T - Tested at extreme temperatures

Question 4

Resistance Spectacle Markings

Answer 4

K - Resistance to surface damage
N - Resistance to fogging
G - Resistance to radiant heat

Question 5

Number Spectacle Markings

Answer 5

3 - Liquid droplets (e.g cement)
4 - Large dust particles
5 - gas/fine dust particles
8 - Short circuit electric
9 - Molten metal/hot solids

Question 6

Safety Specs Materials

Answer 6

• CR39
• Polycarbonate
• TRIVEX

Question 7

CR39 Safety Specs Material

Answer 7

• Standard plastic
• Not a safety material
• Classified as low impact by BS EN standards

Question 8

Polycarbonate Safety Specs Material

Answer 8

• n=1.586 so is lightweight
• Low Abbe number (V=30) so poor peripheral performance
• Has some UV protection
• Impacts cause grazes, not breakages
• Soft material so good for resisiting impact

Question 9

TRIVEX Safety Specs Material

Answer 9

• Strong
• Light and thin
• High impact resisitance

Question 10

TRIVEX Advantages over Polycarbonate

Answer 10

• Higher Abbe number so therefore better peripheral performance
• Increased scratch resisitance
• Better chemical resistance

Question 11

Recommendations Based on Profession

Answer 11

• Carpenter – advise side shields, markings: A 4 5 K
• Builder – advise goggles, markings: A 3 4 5 N K
• Welder – advise face shield, markings: A 9 K G

Question 12

Legal Responsibilities With Safety Specs Dispenses

Answer 12

• The wearer has obligations to wear the protective eyewear when required and in the manner that they were issued
• protective eyewear can be dispensed by anybody
• there is great potential for liability on the part of suppliers so over yourself with notes

Question 13

Snow Skiing Dispensing

Answer 13

• Commonly supplied in goggle form and where a prescription is required inserts may be used
• grey tints should be suggested grey reduces the Visible Light Transmission (VLT) across the spectrum
• Polarised lenses may also be used under these conditions, but these tend to mask small contours on the slope