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Long-term contact lens use can lead to alterations in corneal thickness, stromal thickness, curvature, corneal sensitivity, cell density, and epithelial oxygen uptake, etc. Other changes may include the formation of epithelial vacuoles and microcysts (containing cellular debris) as well as the emergence of polymegethism in the corneal endothelium.
Laser safety. Laser radiation safety is the safe design, use and implementation of lasers to minimize the risk of laser accidents, especially those involving eye injuries. Since even relatively small amounts of laser light can lead to permanent eye injuries, the sale and usage of lasers is typically subject to government regulations.
Eye protection is protective gear for the eyes, and sometimes face, designed to reduce the risk of injury. Examples of risks requiring eye protection can include: impact from particles or debris, light or radiation, wind blast, heat, sea spray or impact from some type of ball or puck used in sports. Eye protection are typically separated into ...
For the first time during the regular season, NFL players are allowed to wear a special accessory over their helmets called a Guardian Cap. It's foam covering meant to limit their risk of ...
There are chemicals in cookware, food, water, clothes and furniture that could cause problems for people’s health. These PFAS, or perfluoroalkyl and polyfluoroalkyl substances — sometimes ...
The Personal Protective Equipment at Work Regulations 1992 are a set of regulations created under the Health and Safety at Work etc. Act 1974 which came into force in Great Britain on 1 January 1993. [1] The regulations place a duty on every employer to ensure that suitable personal protective equipment is provided to employees who may be ...
Erethism, [n 1] also known as erethismus mercurialis, mad hatter disease, or mad hatter syndrome, is a neurological disorder which affects the whole central nervous system, as well as a symptom complex, derived from mercury poisoning. Erethism is characterized by behavioral changes such as irritability, low self-confidence, depression, apathy ...
Cone cells or cones are photoreceptor cells in the retinas of vertebrates' eyes. They respond differently to light of different wavelengths, and the combination of their responses is responsible for color vision. Cones function best in relatively bright light, called the photopic region, as opposed to rod cells, which work better in dim light ...