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Flashcards in Environmental Optometry: 1 Deck (27):
1

What % of workers have vision below the standard required for their occupation?

25-40%

2

What's the most common form of insult in work-related injuries?

Corneal abrasion

3

What is the best lens material based on ANSI standards?

Polycarbonate

4

Ventilation is directly dependent on what?

Type of chemicals

5

Covered vents are _____ ventilation, while venting is ______ ventilation.

Covered Vents = indirect ventilation
Vents = direct ventilation

6

What type of UV ray is more likely to be transmitted to the retina?

UV-A (320 to 380nm)

7

UV-C rays are blocked by what? UV-B?

UV-C: Ozone layer, Cornea
UV-B: Cornea, Lens

8

BB gun injuries were one of the major causes of ________ injuries.

Preventable

9

What are the 5 ocular findings in BB gun injuries?

1. Intraocular infections
2. Hyphema
3. Ocular siderosis
4. Retained IOFB
5. Sympathetic Ophthalmia

10

Bungee jumping can cause what type of hemorrhages?

Preretinal and superficial retinal hemorrhages

11

What are the short term ocular effects of high altitude?

1. High altitude retinopathy
2. Changes in corneal thickness (esp. in Radial Keratometry and Lasik pxs)
3. Photokeratitis

12

What are the 3 long term ocular effects of high altitude?

1. Pterygium
2. Cataract
3. Dry eye syndrome

13

What are the 4 vascular changes at high altitudes?

1. Vascular engorgement
2. Vascular tortuosity
3. Superifical hemorrhages
4. Papilledema

14

What happens to IOP at high altitudes?

IOP decreases

15

What are the 5 vision changes found in space?

1. Hyperopic shift
2. Elevated intracranial pressure (papilledema)
3. Optic disc edema
4. Globe flattening
5. Retinal changes

16

What is the highest contributor to eye injuries that occur at home?

Contact Lenses

17

What are the 2 most common causes of contact lens injuries?

1. Over-wear syndrome
2. Non-compliance/Abuse of lenses

18

What group most commonly has eye injuries from contact lenses at home? What %?

Females (66%)

19

Who gets eye injuries more? men or women? What's the ratio?

Men more
4:1 ratio

20

When do eye injuries tend to peak during the year?

- Dec/Jan (holidays)
- 4th of July (fireworks)
- Summer (outdoor sports)

21

What sport has the greatest prevalence of sports-related eye injuries in the USA? What %?

- Basketball
- 29-67%

22

What type of protector does someone need who works with chemical irritating mists, according to ANSI standards?

Protector Type G

23

Describe protector type G.

Cover goggle, no ventilation

24

What do the new ANSI standards say about Frame Marking?

Spectacle frames intended for non-plano lenses shall be marked with the manufacturer's mark or symbol and Z87-2

25

What do the new ANSI standards say about Lens Marking?

Manufacturer's logo is present and complies with basic impact test

26

What lens marking indicates that the lens complies wit high impact test requirements?

a (+) sign

27

What does the following lens markings mean? W+2.5

Manufacturer = W
- lens meets high impact requirements
- 2.5 filter on it