Lenses that contain wooden, metallic, plastic, ceramic or frames made from other materials for placement on the eyes are called eye glasses, spectacles, or just glasses. They are worn by different people for different personal reasons. Today, they incorporate several features that allow them to do more than one function. In San Antonio eye glasses are manufactured by people with years of experience and great expertise in eye care. As such, products are of good quality too.
These items get grouped depending on their application. Main groups are corrective, sunglasses, fashion, safety, and 3D articles. Corrective lenses are used to correct refractive errors in people with impaired vision. They eliminate the effects presented by various eye conditions like astigmatism, presbyopia, myopia, and hypermetropia through bending of light as it enters the eye. Their designs are all meant to meet the prescriptions made by eye care experts such as optometrists and ophthalmologists. Accuracy of prescriptions may be verified by use of a lensmeter.
Safety glasses are special products specifically meant for preventing injuries and contamination caused to the eyes. They keep liquid and solid substances away from the sensitive organs in different working settings. Plastic used to make their lenses is shatter-resistant. Goggles are sometimes used as replacements for welding helmets when helmets cause discomfort or inconvenience. Goggles like those ones contain dark lenses. The lightweight nature and flexibility of nylon-framed products make them applicable by athletes during training and competitions.
Sunglasses are at times worn to preventing UV and bright light from harming the eyes. The lens incorporated in such products is photosensitive. This means that its color transforms to dark upon being struck by bright Ultraviolet radiation. This way, excessive radiation is blocked off from reaching the eyes and causing harm. Light polarization capability incorporated in modern products also allow them to eliminate horizontally polarized beams
Today, many people wear glasses to hide eyes or for style. Many celebrities identify, distinguish or separate themselves from their movie characters by wearing these products. Near opaque glasses are also worn by blind people for cosmetic reasons.
Technology has made it possible for lenses to be made from high-tech plastics as opposed to glasses as was traditionally the case. High-tech plastics have several advantages over glass. Some of the advantages include being light, durable, thinner, scratch-resistant, not easily breakable, and ability to be treated. The lenses are therefore classified into various classes such as trivex, photochromic, aspheric, polarized, polycarbonate, and high index plastic lenses.
Various applications are served well by different lens categories. For example, polycarbonate lens works well for kids and athletes because it is impact-resistant. Trivex lens has lighter, thinner, and better vision correction capability even though it has same properties as polycarbonate lens. The high-tech plastic in trivex lens is comparatively newer also.
Strong prescriptions are on the contrary served well with high index plastic lens. The surface of aspheric lens is composed of differing degrees of curvature. This differentiates it from ordinary spherical lenses. Because of the shape and nature of its surface, aspheric lens has a lager usable surface.
These items get grouped depending on their application. Main groups are corrective, sunglasses, fashion, safety, and 3D articles. Corrective lenses are used to correct refractive errors in people with impaired vision. They eliminate the effects presented by various eye conditions like astigmatism, presbyopia, myopia, and hypermetropia through bending of light as it enters the eye. Their designs are all meant to meet the prescriptions made by eye care experts such as optometrists and ophthalmologists. Accuracy of prescriptions may be verified by use of a lensmeter.
Safety glasses are special products specifically meant for preventing injuries and contamination caused to the eyes. They keep liquid and solid substances away from the sensitive organs in different working settings. Plastic used to make their lenses is shatter-resistant. Goggles are sometimes used as replacements for welding helmets when helmets cause discomfort or inconvenience. Goggles like those ones contain dark lenses. The lightweight nature and flexibility of nylon-framed products make them applicable by athletes during training and competitions.
Sunglasses are at times worn to preventing UV and bright light from harming the eyes. The lens incorporated in such products is photosensitive. This means that its color transforms to dark upon being struck by bright Ultraviolet radiation. This way, excessive radiation is blocked off from reaching the eyes and causing harm. Light polarization capability incorporated in modern products also allow them to eliminate horizontally polarized beams
Today, many people wear glasses to hide eyes or for style. Many celebrities identify, distinguish or separate themselves from their movie characters by wearing these products. Near opaque glasses are also worn by blind people for cosmetic reasons.
Technology has made it possible for lenses to be made from high-tech plastics as opposed to glasses as was traditionally the case. High-tech plastics have several advantages over glass. Some of the advantages include being light, durable, thinner, scratch-resistant, not easily breakable, and ability to be treated. The lenses are therefore classified into various classes such as trivex, photochromic, aspheric, polarized, polycarbonate, and high index plastic lenses.
Various applications are served well by different lens categories. For example, polycarbonate lens works well for kids and athletes because it is impact-resistant. Trivex lens has lighter, thinner, and better vision correction capability even though it has same properties as polycarbonate lens. The high-tech plastic in trivex lens is comparatively newer also.
Strong prescriptions are on the contrary served well with high index plastic lens. The surface of aspheric lens is composed of differing degrees of curvature. This differentiates it from ordinary spherical lenses. Because of the shape and nature of its surface, aspheric lens has a lager usable surface.
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