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How to choose eyeglass lenses?

Glass lenses can be made from different materials such as glass, plastic, or polycarbonate. Polarized lenses are lenses that are designed to reduce glare caused by reflective surfaces such as water, snow, and glass. Polarized lenses work by blocking horizontal light waves while allowing vertical light waves to pass through.
A replacement lens refers to a new or spare lens that is used to replace a damaged or old lens in glasses. These lenses are available in various materials, tints, and coatings to suit different visual needs and preferences. You can buy replacement lenses from Gath and Oakley.
Choosing replacement lenses, whether for eyeglasses or sunglasses, involves several considerations to ensure they meet your visual and lifestyle needs. Here´s a step by step guide to help you choose the right replacement lenses:

Prescription information:
If you wear prescription lenses, make sure you have your most up to date prescription from your eye doctor. The prescription should include details such as sphere SPH, cylinder CYL, axis, and any additional information related to your eyesight correction.
Lens material: Discuss with your optometrist or optician the best lens material for your prescription and lifestyle. Common materials include plastic CR 39, polycarbonate, high index plastic, and Trivex. The choice depends on factors like your prescription strength, frame choice, and the need for impact resistance.

Lens type:
Consider the type of lenses you need:
Single vision: These lenses have a single prescription power throughout and are used for either nearsightedness myopia, farsightedness hyperopia, or astigmatism.
Bifocal: Bifocal lenses have two distinct prescription areas: one for distance vision and another for close up reading vision.
Progressive Multifocal: Progressive lenses provide a seamless transition between distance, intermediate, and near vision without visible lines. They are often preferred for presbyopia correction.
Specialized lenses: Depending on your needs, you may require lenses designed for specific activities, such as computer use computer lenses or sports sports lenses with impact resistance.

Lens coatings:
Consider additional coatings or treatments for your lenses:
Anti reflective coating: Reduces glare and reflections, providing clearer vision and better aesthetics.
Scratch resistant coating: Helps protect your lenses from scratches, extending their lifespan.
UV protection: Lenses can have built in UV protection to shield your eyes from harmful UV rays.
Blue light blocking: If you spend a lot of time on digital devices, blue light blocking coatings can reduce eye strain and potentially improve sleep.

Tint and photochromic options: Depending on your lifestyle, you may want tinted lenses for sunglasses or photochromic lenses that automatically adjust to changing light conditions.
Lens thickness: For higher prescriptions, thinner lens materials high index can reduce the thickness and weight of your lenses.
Lens brand and quality: Opt for reputable lens brands and ask your optometrist or optician for recommendations based on your needs and budget.
Lens design: Different lens designs, such as aspheric or free form, can improve optical clarity and reduce distortion. Discuss the best design for your prescription with your eyecare professional.
Lens care and maintenance: Inquire about proper cleaning and care instructions for your chosen lenses to ensure their longevity and performance.
Frame compatibility: Ensure that the lenses you choose are compatible with your eyeglass or sunglass frames in terms of size and shape.

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