Les verres bifocaux sont un type de verres de lunettes qui contiennent deux puissances optiques distinctes: un pour la vision de loin et un autre pour la vision de près. Ils sont généralement prescrits aux personnes qui ont besoin d’une correction pour la presbytie (difficulté liée à l’âge à se concentrer sur des objets proches) et une autre erreur de réfraction telle que la myopie (myopie), hypermétropie (Hypermétropie), ou astigmatisme.
La conception des lentilles bifocales comprend un segment distinct près du bas de la lentille, appelé le "segment proche," qui contient la puissance supplémentaire pour la correction de la vision de près. Ce segment a souvent la forme d’un demi-cercle ou d’un "D" et est placé légèrement en dessous du centre de l’objectif. La partie supérieure de l’écran est destinée à la correction de la vision de loin.
En cas de port de lentilles bifocales, users can simply look through the appropriate part of the lens depending on whether they need to see objects up close or at a distance. This eliminates the need for constantly switching between different pairs of glasses for different tasks.
There are also variations of bifocal lenses, such as trifocal lenses, which have three distinct optical powers: one for distance vision, one for intermediate vision (p. ex., computer distance), and one for near vision. These lenses can be particularly useful for individuals with a range of vision needs.
Bifocal lenses can be made with various lens materials and coatings to enhance durability, scratch resistance, and visual clarity. They are available in both glass and plastic materials, with plastic lenses being more lightweight and less prone to breakage.
If you're considering bifocal lenses, it's essential to consult with an eye care professional who can assess your vision needs and prescribe the most suitable type of lenses for you.
Les verres bifocaux sont un type de verres de lunettes qui contiennent deux puissances optiques distinctes: un pour la vision de loin et un autre pour la vision de près. Ils sont généralement prescrits aux personnes qui ont besoin d’une correction pour la presbytie (difficulté liée à l’âge à se concentrer sur des objets proches) et une autre erreur de réfraction telle que la myopie (myopie), hypermétropie (Hypermétropie), ou astigmatisme.
There are also variations of bifocal lenses, such as trifocal lenses, which have three distinct optical powers: one for distance vision, one for intermediate vision (p. ex., computer distance), and one for near vision. These lenses can be particularly useful for individuals with a range of vision needs.
Bifocal lenses can be made with various lens materials and coatings to enhance durability, scratch resistance, and visual clarity. They are available in both glass and plastic materials, with plastic lenses being more lightweight and less prone to breakage.
If you're considering bifocal lenses, it's essential to consult with an eye care professional who can assess your vision needs and prescribe the most suitable type of lenses for you.
There are also variations of bifocal lenses, such as trifocal lenses, which have three distinct optical powers: one for distance vision, one for intermediate vision (p. ex., computer distance), and one for near vision. These lenses can be particularly useful for individuals with a range of vision needs.
Bifocal lenses can be made with various lens materials and coatings to enhance durability, scratch resistance, and visual clarity. They are available in both glass and plastic materials, with plastic lenses being more lightweight and less prone to breakage.
If you're considering bifocal lenses, it's essential to consult with an eye care professional who can assess your vision needs and prescribe the most suitable type of lenses for you.
