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Types of contact lenses
Contact lenses also called “contacts” or “lenses” are corrective, cosmetic, or therapeutic lenses usually placed on the cornea of the eye.
Contact lens usually serve the same corrective purpose as conventional spectacle lenses, but are much smaller and almost invisible. Many contact lenses are tinted with a faint blue or green to make them more visible when immersed in cleaning and storage solutions. This tint is also known as “handling tint”. Cosmetic lenses are deliberately colored for altering the appearance of the eye.
Types of contact lenses
Corrective contact lenses – A corrective contact lens is a lens designed to improve vision by neutralizing the refractive defect of the eye. In many people, there is a mismatch between the refractive power of the eye lens and the length of the eye, leading to a refraction error. A contact lens neutralizes this error and re-focus images directly onto the retina instead of before or behind. Conditions correctable with contact lenses include near (or short) sightedness (myopia), far (or long) sightedness (hypermetropia), astigmatism and presbyopia.
Tinted contact lenses – Tinted contact lenses are designed to change the appearance of the eye. This type of contact lens is very popular among young people.
Therapeutic contact lenses - Soft lenses are often used in the treatment and management of non-refractive disorders of the eye. A bandage contact lens protects an injured or diseased cornea from the constant rubbing of blinking eyelids and in some cases eye lashes, thereby allowing it to heal. Contact lenses to deliver drugs to the eye have also been developed.
Complications
Complications due to contact lens wear affect effect a very small percentage of contact lens wearers. Excessive wear of contact lenses, particularly overnight wear, is associated with safety concerns. Hydrogen silicone lenses are the latest technology in lens material and are in many cases suitable for extended or even overnight wear.
Problems associated with contact lens wear may affect the eyelid, the conjunctiva, the various layers of the cornea, and even the tear film that covers the outer surface of the eye.
Through a Blue Lens ( 1 / 6 )
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MysticMaid G718KC-P/T Home Cleaning Cloth, Assorted Colors $12.00 The Original and Best Microfiber Cleaning Cloth. Here’s Why. If you could look at this MysticMaid cloth under a microscope, you would see that the entire length of each microfiber has been split into thousands of tiny micro-hooks and channels to collect, trap and remove, dirt, dust, grease and grime. You’ll marvel at how this cloth cleans, lint-free, streak-free. The more you use it the more you’l… |
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Riding Glasses HT001 Pearl Black with 5 Lenses (Brown, Blue, Clear, Gray, Buff) $18.99 Introduction: There is a way of protecting your eyes and being cool while you are riding. Our riding glasses is the one to meet your needs. This kind of riding glasses is completely different from the ordinary sunglasses, the nose can be safely protected from injuries caused by the impact of gravity, since it is made of high elastic composite resin, which features good flexibility and strength, li… |
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Lacoste Chantaco Sunglasses – L604S Dark, elegant shades with the Lacoste touch. Polycarbonate lenses. Lenses have UV (Ultraviolet ray) protection. Case and cleaning cloth included…. |
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Billy Strayhorn:Lush Life $4.39 From 1938, until his death in 1967, composer/arranger/pianist Billy Strayhorn was so entwined with Duke Ellington that musicologists are still trying to figure out where the former ends and the latter begins. On this companion soundtrack to the PBS documentary, pianists Bill Charlap and Hank Jones display their solo chops on the stridish “Fantastic Rhythm” and the soulful “Satin Doll” and reprise… |
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Blue Sky Objective $7.99 Emulsion s full-length debut CD brings together elements of 80 s electro, cutting-edge IDM, and bouncy melodies steeped in indie influences. Blue Sky Objective is electronic pop music: an accessible and appealing mixture of pretty, emotive melodies and lo-fi electro beats. Thanks to an NES-lit eighties childhood, Emulsion s Nathan Koch never lost his obsession with the eight-bit aesthetic… |
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Blue Sky Remixes $6.93 … |
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Mighty Bright Blue Xtraflex 2 LED Book Light $11.25 This LED book light comes Mighty Bright, leaders in the LED applications industry. Super compact and lightweight, this LED book light is ideal for travelers, students or anyone who loves to read. The clip grips onto almost anything or you can use it freestanding as a task light. A special lens spreads light evenly, eliminating hot spots. Blue housing. Bendable arm. With a super LED bulb that is as… |
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GU10 120v 50w MR-16 50 Watts JDR C Halogen Bulb Lamp $0.01 GU10 120v 50w MR-16 MR16 Long Life Lamp Premium quality by Divine Lighting This is 50 watts, 30 degrees. We also sell 35-watt and 75-watt versions. Integral rounded cover glass, slightly rounded. Manufacturer : |
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Uvex S1933X Skyper Safety Eyewear, Black Frame, SCT-Orange UV Extreme Anti-Fog Lens $6.60 … |
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Human Planet $24.25 The BBC’s follow-up to their landmark Planet Earth is another astounding document of natural selection, focusing on the constantly shifting–and often remarkably harsh–relationship between human beings and their surroundings. Narrated by John Hurt, this eight-episode series explores the amazing lengths people must go to in order to survive in various unwelcoming habitats around the world, such as… |
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Oakley Eyepatch 2 Sunglass – Mens – Blue/Clear Fade/Black Grey Gradient $99.99 Oakley’s original Eyepatch sunglasses were the biggest frames they ever created — now the Oakley Eyepatch 2 Sunglasses lays out intricate detailing to become the new heir of originality. Its durable yet lightweight O Matter frame is decked out with dual-hinges in a comfortable Three-Point Fit. In these youll have enough lens space to keep the world in view while maintaining razor-sharp clarity along every centimeter of the UVA, UVB and UVC repelling PLUTONITE lenses. One size fits most. |
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Oakley Flak Jacket XLJ Sunglasses $139.99 Sport professionals demand nothing less than the best, and Oakley has answered their challenge for decades. World-class athletes have driven Oakley to create innovation after innovation, including interchangeable lens designs with unbeatable optical clarity. The Oakley Flak Jacket XLJ Sunglasses takes that to the next level with the latest in performance technology. It features a Hydrophobic lens coating that prevents rain and sweat from building up on the lens. It also repels skin oils and other contaminates, so the lens is smudge resistant and easy to keep clean. You can change lenses in seconds to optimize vision in any sport environment. Multiple lens colors are available, and all lenses feature the unbeatable clarity of Oakleys High Definition Optics (HDO). Choose the nose pads that give you the best fit — multiple sizes are included with every frame. Like the stem sleeves, theyre made of Unobtainium to increase grip with perspiration. Oakleys Three-Point Fit optimizes comfort and holds the lenses in precise optical alignment for superior clarity. The frame is made of lightweight O Matter for all-day comfort. The semi-rimless design means theres no frame rim to block downward view. Each frame comes with a case for transport. Athletes need the best, and they need their sunglasses to provide protection and durability. The Flak Jacket XLJ offers UV protection with their PLUTONITE lens that filters out 100% of UVA, UVB, UVC and harmful blue light up to 400 nm…. |