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A single optical prescription is used for single vision lenses to correct vision at one specific distance. If you are long-sighted and have trouble seeing up close, the prescription given would be plus. Conversely, if you are short-sighted and need help with distant vision, the prescription given would be minus.

Example: HOYA Synx III, HOYA Nulux Identity V+, HOYA Hilux, KODAK Digital Single Vision Lens, Essilor Eyezen, ZEISS Single Vision AS, ZEISS Single Vision Superb, ZEISS Single Vision Individual

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A single pair of glasses with progressive lenses can assist with near tasks like reading, intermediate tasks like watching TV, and distant tasks like driving. Unlike bifocals and trifocals, progressive lenses provide a seamless transition between different prescription powers without visible lines or image jumps.

Example: HOYAlux iD Lifestyle 4, HOYAlux iD Myself, Essilor Varilux, KODAK Softwear Lens, ZEISS Individual 2, ZEISS Precision Superb

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A myopia control lens is created to slow the progression of myopia (nearsightedness) in children and young adults. There is a large stable reading area and good peripheral clarity in the distance zone. By reducing eye strain when focusing on close objects (reducing the accommodative lag), these lenses can potentially slow down the worsening of myopia over time.

Example: KODAK Kids Lens, Essilor Stellest, HOYA MiYOSMART, ZEISS MyoVision Pro

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Photochromic lenses offers convenience and comfort as it adapts to changing light situations. The lenses would darken when exposed to sunlight, and fade back to clear when you are indoor, reducing the need to switch between regular glasses and sunglasses.

Example: Essilor Transitions, HOYA Sensity, ZEISS Urban

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Plastic materials are available in a wide range of styles and compositions. This versatile and innovative material can be easily colored, laminated, patterned, or even layered with fabrics, making it one of the most practical options. It also easily accommodated with thicker lens prescription as it has a thicker frame. The most often used plastic frame material:

i.        Polyamide is a heat- and impact-resistant material that is both solid and flexible. Polyamide frames come in a variety of colours and patterns and are lightweight.

ii.          Nylon is a resilient, flexible material that withstands heat and impact. Sports eyewear frequently uses nylon frames because of its flexibility and strength.

iii.         Zyl/cellulose acetate, and comes in an array of colors.

iv.         Propionate, a hypoallergenic plastic based on nylon. It feels and looks distinct from other plastics and is lightweight.

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Metal frames are a popular choice for those who prefer barely noticeable glasses, as they can be extremely thin and lightweight. They fit the wearer’s face more accurately, providing a secure and comfortable fit. With various shapes and colors available, metal frames offer more personalization and fashion options. Additionally, these frames are more robust and long-lasting than plastic ones. Some of the metal frames are:

i.         Stainless Steel: These frames provide the ideal mix between strength and weight without compromising style or cost. They are perfect for many applications where lifespan is crucial because of their resistance to corrosion.

ii.          Titanium/Beta-titanium: These frames are famous for being strong, hypoallergenic, and lightweight. They are an excellent choice for skin that is sensitive and resistant to corrosion.

iii.         Memory Metal: Nickel and titanium are used to make these frames. They are famous for being robust and flexible. They are a great choice for anyone who needs glasses for sports or other physically demanding activities because they are also resistant to bending and breaking.

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Rimless glasses are comfortable for long-term wear due to their lighter weight, which reduces pressure on the nose and ears. Their minimalist and subtle design complements various outfits and occasions, making them versatile. However, they may be more prone to breakage and require careful handling, and maintenance can be more expensive.

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NUR FARAHAIN BINTI SHAEDAN

2021620362

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