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Results for “Eye Protective Devices”

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At least 1,135 records · Page 63Linked to original sources
PubMed1997

Shatter resistance of spectacle lenses.

OBJECTIVE: To evaluate the relative strength and shatter resistance of spectacle lenses currently used in sunglasses and dress, sports, and industrial eyewear. DESIGN: Seven lenses that met the US American National Standards Institute (ANSI) Z80 standards for dress glasses (made of high-index plastic, allyl resin plastic, heat tempered glass, chemically tempered glass, and polycarbonate, and with center thickness ranging from 1 mm to 2.2 mm) and 4 lenses that met ANSI Z87 standards for industrial safety eyewear (allyl resin plastic, heat-tempered glass, chemically tempered glass, and polycarbonate, all with 3.0-mm center thickness) were tested for impact resistance to 5 projectiles (air gun pellets, golf balls, tennis balls, lacrosse balls, and baseballs). MAIN OUTCOME MEASURES: Impact energy required to shatter spectacle lenses. RESULTS: Based on 348 lens impacts, dress and industrial lenses made from glass, allyl resin plastic, and high-index plastic shattered at impact energies less than those expected to be encountered from the test projectiles during their routine use. Polycarbonate lenses demonstrated resistance to impact for all tested projectiles exceeding the impact potential expected during routine use. CONCLUSIONS: Under the test conditions of this study, polycarbonate lenses demonstrated greater impact resistance than other commonly used spectacle lenses that conform to prevailing eyewear standards. These findings suggest that current ANSI Z80 and ANSI Z87 standards should be reevaluated.

Eye Protective Devices↗
PubMed1996

Eye injuries during training exercises with paint balls.

The use of paint balls, increasingly popular for war games and survival games, has recently been introduced for certain military training exercises. We treated two soldiers who had severe permanent ocular damage after being hit by these balls. Both removed their goggles after their vision was obscured with paint from a hit on these protective lenses. They were then hit for a second time, resulting in the eye injury. Based on these cases and on a literature review, we conclude that protective eye gear should be mandatory when paint pellets are used. It is essential that service members participating in such exercises be instructed not to remove their protective goggles under any circumstances.

Adult↗
PubMed1977

Visual consideration and correction for respiratory protective masks.

The visual consideration in the selection of respiratory protective masks and the visual correction required by the wearer are discussed. Included is a list of manufacturers and suppliers of protective masks that have been designed for the mounting of corrective lenses inside the mask.

Eye Protective Devices↗
PubMedDate not supplied

Light relief.

Explore the source record for details and available documents.

Aged↗
PubMed1997

Glassblowers' ocular health and safety: optical radiation hazards and eye protection assessment.

The aims of this study were to investigate the levels of optical radiation exposure in glassblowing and to determine type(s) of protective eyewear commonly used. Radiometric measurements of radiant emissions from different molten glass materials and heating systems were carried out in six installations. Spectral transmittance curves of available protective lenses used at the locations were obtained. Significant variation (P = 0.0001) in ocular irradiation was obtained. All operations produced irradiances higher than the threshold limit values (TLVs) for the visible spectrum (400 to 700 nm). In craft glassblowing which employs furnace systems, irradiance levels exceeding the TLVs for near infrared (760 1o 1100 nm) were obtained. Molten soda-lime and quartz glasses emitted substantial subthreshold near UV radiation. This study shows that variation exists in glassblowing ocular radiation exposure due to different glass materials and heating systems, therefore selection of appropriate eye protector should be on an individual basis.

Adolescent↗
PubMed1997

Light-weight and low-cost infrared CCD eye monitoring system designed for routine vestibular clinic use.

A simple and low-cost eye monitoring system with infrared illumination was developed. This system consists of a small board mounted with an infrared sensitive CCD camera and its control unit and a swimming goggle; it is light-weight and visualizes eye movements by connecting the output lines of the board to the video input on a monitor. We have found the present system useful in the routine vestibular clinic practice.

Costs and Cost Analysis↗