UV SCREENING - an invisible coating that blocks UV light, Polycarbonate - often required for pediatric corrective lenses, Tint - can reduce glare, improve contrast and enhance depth perception , Polarization - a chemical film that helps reduce glare so objects are seen more clearly, Single Focus - lenses that have one focal point, Glass - higher weight than plastics, easily shatters, Progressive - lenses eliminate the visible lines of traditional multifocal lenses, low vision - Visual impairment not correctable by standard glasses, contact lenses, medicine or surgery, bifocal - lenses with two focal points, High Index - allow for thinner lenses, contact Lenses - thin plastic lenses placed directly on the surface of the eye, Trifocal - lenses that have three focal regions,

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