Flashcards in Environmental Optometry: 1 Deck (27):
What % of workers have vision below the standard required for their occupation?
What's the most common form of insult in work-related injuries?
What is the best lens material based on ANSI standards?
Ventilation is directly dependent on what?
Type of chemicals
Covered vents are _____ ventilation, while venting is ______ ventilation.
Covered Vents = indirect ventilation
Vents = direct ventilation
What type of UV ray is more likely to be transmitted to the retina?
UV-A (320 to 380nm)
UV-C rays are blocked by what? UV-B?
UV-C: Ozone layer, Cornea
UV-B: Cornea, Lens
BB gun injuries were one of the major causes of ________ injuries.
What are the 5 ocular findings in BB gun injuries?
1. Intraocular infections
3. Ocular siderosis
4. Retained IOFB
5. Sympathetic Ophthalmia
Bungee jumping can cause what type of hemorrhages?
Preretinal and superficial retinal hemorrhages
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)
What are the 3 long term ocular effects of high altitude?
3. Dry eye syndrome
What are the 4 vascular changes at high altitudes?
1. Vascular engorgement
2. Vascular tortuosity
3. Superifical hemorrhages
What happens to IOP at high altitudes?
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
What is the highest contributor to eye injuries that occur at home?
What are the 2 most common causes of contact lens injuries?
1. Over-wear syndrome
2. Non-compliance/Abuse of lenses
What group most commonly has eye injuries from contact lenses at home? What %?
Who gets eye injuries more? men or women? What's the ratio?
When do eye injuries tend to peak during the year?
- Dec/Jan (holidays)
- 4th of July (fireworks)
- Summer (outdoor sports)
What sport has the greatest prevalence of sports-related eye injuries in the USA? What %?
What type of protector does someone need who works with chemical irritating mists, according to ANSI standards?
Protector Type G
Describe protector type G.
Cover goggle, no ventilation
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
What do the new ANSI standards say about Lens Marking?
Manufacturer's logo is present and complies with basic impact test
What lens marking indicates that the lens complies wit high impact test requirements?
a (+) sign