Szemüveglencsékre

Szemüveglencsékre are optical lenses designed to correct vision problems by refracting light before it enters the eye. They are typically made of glass or plastic and are ground to specific curvatures to compensate for refractive errors such as myopia (nearsightedness), hyperopia (farsightedness), astigmatism, and presbyopia. The primary function of szemüveglencsékre is to focus light accurately onto the retina, allowing for clear vision.

There are various types of szemüveglencsékre available, each suited to different visual needs. Single vision lenses correct only one field of vision, either for distance or near. Bifocal lenses have two distinct optical powers, allowing correction for both near and far vision, separated by a visible line. Progressive lenses, a more advanced type, offer a seamless transition of prescription power across the entire lens, providing clear vision at all distances without a dividing line.

Materials used for szemüveglencsékre influence their properties. Glass lenses are durable and scratch-resistant but are heavier and can shatter. Plastic lenses, such as polycarbonate and high-index plastics, are lighter, more impact-resistant, and can be made thinner, especially for higher prescriptions. Coatings can be applied to lenses to enhance their performance, including anti-reflective coatings to reduce glare, scratch-resistant coatings for durability, and UV-protective coatings to shield the eyes from harmful ultraviolet radiation. The prescription for szemüveglencsékre is determined by an optometrist or ophthalmologist after a comprehensive eye examination.