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Topic: Corrective lenses

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	Detachable corrective lens assemblies - Patent 6027214
		Corrective lenses may be provided in many forms for correcting a variety of vision deficiencies and impairments and to suit various needs and applications.
		Corrective lenses 12 are preferably generally similar in configuration and dimension to the lenses mounted in the base eyeglasses to which lens assembly 10 is adapted to be detachably mounted.
		The important aspect of the present invention is that such corrective lenses are mounted in a frame to form a lens assembly that is quickly and conveniently attachable to and detachable from a pair of base eyeglasses to modify the correction.
	www.freepatentsonline.com /6027214.html (5082 words)

	Corrective lens - Wikipedia, the free encyclopedia
		The most common types of corrective lenses are eyeglass lenses and contact lenses.
		Corrective lenses are usually prescribed by an optometrist.
		The lenses may not be lighter, however, due to the increase in density vs. mid- and normal index materials.
	en.wikipedia.org /wiki/Corrective_lens (2372 words)

	History
		The concept of corrective lens that could be worn directly on the eye was first recorded by Renaissance genius Leonardo da Vinci at the beginning of the sixteenth century, and then by philosopher and mathmatician Rene Descartes in the seventeenth century.
		The birth of soft lenses was inspired by Otto Wichterle, a Czechoslovakian chemist who began experimenting with a different kind of plastic called HEMA (hydroxyethylmethylmethacrylate), which is optically clear and is used in surgery because of its compatibility with human tissue.
		Some of the latest options for vision correction are surgical procedures which use diamond-tipped blades or cool beams of laser energy to correct the shape of the cornea and restore vision to normal or close to normal.
	www.nvo.com /icaredoc/files (1132 words)

	[No title]
		Corrective lenses are usually able to fix this problem with a cylinder lens.
		This effect is furthered in glasses by a gradual strengthening of the prisms in the lenses as one moves closer to the external border of the lenses.
		The lenses in glasses manipulate where the light which passes through them is focused so as to correct for problems with the lenses of a person’s eyes.
	www.angelfire.com /scifi2/eyeglass (1547 words)

	Seaspecs - Contact Lenses
		Contact lenses usually serve the same corrective purpose as conventional glasses, but are lightweight and virtually invisible — many commercial lenses are tinted a faint blue to make them more visible when immersed in cleaning and storage solutions.
		Often lenses are weighted more at the bottom and are marked by tiny striations so the wearer can insert them in the correct orientation, or they are designed so that the correct orientation is restored when the user blinks.
		Intraocular contact lenses, also known as an implantable contact lenses, are special small corrective lenses surgically implanted in the eye's posterior chamber behind the iris and in front of the lens to correct higher amounts of myopia and hyperopia.
	www.seaspecs.com /html/link_cats/ContactLenses.html (4002 words)

	Proteye corrective diving lenses - types
		Lenses are tempered and bonded onto existing or custom made tempered face plates with a special adhesive.
		Both lenses are tempered and bonded onto existing or custom made tempered face plates with a special adhesive.
		Lenses for divers who need corrections to see far and nearby objects and also need astigmatic correction.
	www.proteye.nl /Eng/lo/typelenses.html (463 words)

	Corrective Contact Lenses - 66 Contact Lenses
		The idea of wearing contact lenses not only for visual correction but also for bettering eyesight and eye health has been around for some time, though not always with great results.
		Instead of correcting any malformation of the cornea through elective surgery and exposing yourself to all the risks inherit in it, products such as orthokeratology lenses can benefit people who don't mind wearing contacts occasionally, but don't want to be bogged down into wearing them every day.
		The advantage of ortho-k over surgery is that most refractive surgery procedures are permanent and with contacts you can stop use, allowing your corneas to regress back to their natural state, since no tissue is removed.
	www.66-contact-lenses.com /corrective_contact_lenses/index.htm (241 words)

	49:0973(94)NG - - NTEU and Treasury, IRS, Washington, DC - - 1994 FLRAdec NG - - v49 p973
		The Agency states that the corrective lenses referenced in the provision are "ordinary corrective lenses[.]" Statement of Position at 3.
		Consequently, the Union argues that, because the corrective lenses must be certified as job-related, the provision is consistent with both 29 U.S.C. § 668(a) and 5 U.S.C. § 7903, which govern the expenditure of appropriated funds for the purchase of protective equipment.
		Thus, although the corrective lenses may assist the employees to perform better on the new equipment, there is no evidence that the lenses would be designed to protect the employees from any hazards that might be associated with the equipment.
	www.flra.gov /decisions/v49/49-094-4.html (2516 words)

	Haunted Bay - Halloween Contact Lenses - Safe?
		Halloween lenses, also called costume or theatrical lenses, are soft contact lenses with a layer of color embedded in them.
		Scleral lenses are used only for special effects (not for correction) and usually cost a bit more than round ones.
		Corrective or not, costume lenses are medical devices, and even though most people can wear them without problems, you should consult your eye doctor and get a prescription.
	www.hauntedbay.com /entertaining/costumes/halloweencontacts.shtml (714 words)

	Corrective lens Summary
		To correct hyperopia, convex corrective lenses are used to make the light rays converge or come together on the retina.
		To correct this, the exact area of the irregularity of the cornea is located, and a corresponding area on the eyeglass lens is ground to bring light rays passing through that area into proper focus.
		The most common types of corrective lenses are spectacle lenses and contact lenses.
	www.bookrags.com /Corrective_lens (1516 words)

	Refractive Disorders: Eye Disorders: Merck Manual Home Edition
		Good vision correction is possible with both eyeglasses and contact lenses; for most people, the choice is a matter of appearance, convenience, and comfort.
		Lenses can also be coated to reduce the amount of potentially damaging ultraviolet light that reaches the eye.
		Continuously variable lenses (progressive add lenses) also permit focusing at middle distances and have a cosmetic advantage in that there is no line or sharp division between the lenses.
	www.merck.com /mmhe/sec20/ch226/ch226a.html (2428 words)

	Contact Lenses Encyclopedia of Childhood and Adolescence - Find Articles
		The concept of corrective lenses that sit directly on the eyeball was developed in the ninth century, but it was not until the late 20th century that manufacturing and grinding techniques for contact lenses were perfected.
		Extended wear lenses are intended to be worn for several weeks at a time, while disposable lenses are thrown away every day or every few weeks, or in the newest versions, every day.
		The primary drawback to wearing contact lenses, especially for children, is the requirement that they be cleaned and disinfected daily in order to prevent an infection, which could result in permanent damage to the eye.
	www.findarticles.com /p/articles/mi_g2602/is_0001/ai_2602000160 (713 words)

	Safety eyeglasses and corrective lens carrier therefor - Patent 5530490
		Specifically, the assembly of the instant invention comprises a carrier which is adapted for receiving corrective lenses therein and a frame which is adapted to be detachably and adjustably secured to the carrier.
		An even still further object of the instant invention is to provide a safety eyeglass assembly comprising a carrier which is adapted for receiving corrective lenses therein and a frame which is detachable from the carrier for interchanging the frame with another frame of a different color or appearance.
		The carrier 12 is adapted for snap receiving a pair of corrective lenses therein, and it is integrally made from a transparent plastic material so that the carrier 12 with the lenses 22 and 23 provides a clear, unobstructed viewing assembly.
	www.freepatentsonline.com /5530490.html (2561 words)

	eyesColored - Articles - Colored Contacts Articles - Cosmetic Vs. Corrective Contacts
		Corrective lenses are also good for correcting myopia or astigmatism.
		While a lot of colored contact lenses are known for their ability to change the color of your eyes, in the year 2004 only 3% of lenses prescribed were for colored contacts.
		Certain contact lenses called bandage contact lenses are designed to be placed over a cornea which is damaged so that it can heal without having your eyelids rubbed against it when you blink.
	www.eyescolored.com /catalog/article_info.php/articles_id/58 (434 words)

	Contact Lenses: Types, Cost, Care, Risks, and Proper Wear - Kellogg Eye Center
		Contact lenses are sometimes used therapeutically in eye diseases where an uneven cornea blurs vision, such as keratoconus or scarring.
		Gas-permeable lenses: These lenses are also known as "RGPs." They are newer rigid or "hard" lenses made of plastics combined with other materials, such as silicone and fluoropolymers, which allow oxygen in the air to pass directly through the lens.
		Some of the conditions that might keep you from wearing contact lenses are: frequent eye infections, severe allergies, dry eye (improper tear film), a work environment that is very dusty or dirty and inability to handle and care for the lenses properly.
	www.kellogg.umich.edu /patientcare/conditions/contact.lenses.html (1055 words)

	Bifocal Lenses (Site not responding. Last check: 2007-10-12)
		Bifocals are eyeglasses that have corrective lenses containing two different optical powers.
		Originally the lenses were simply cut in half and combined together in the rim of the frame.
		Although most printed reading materials are easily viewed with bifocals, computer monitors are generally placed directly in front of users, but still close enough to require corrective lenses, requiring bifocal wearers to tilt their heads up to view the screen.
	www.dvn.co.za /bifocal.htm (211 words)

	PDA-Corrective lenses for Diving Masks
		In spectacles, plus lenses have the convex surface facing away from the eyes, on a diving mask however, the lenses are glued on the inside, therefore the convex surface faces towards the eyes.
		Modern progressive power lenses can’t be used in diving masks as the greater than usual distance between the eye and the lens surface is not compatible with the intricate function of these lenses.
		All prescription lenses used in diving masks are made from glass and bonded on the back surface of the original mask lens using a UV curing adhesive (Loctite 358).
	www.perthdiving.com.au /Masklenses.html (1075 words)

	Corrective Lenses
		A wide variety of contact lenses are available, including hard, soft, extended wear, and disposable, rigid gas permeable and bifocal lenses.
		After improvement, the lenses are worn less frequently, only used to maintain the eyes' new corrected shape.
		For those who have astigmatism but want to forego corrective lenses and eyeglasses, surgery may be an option.
	www.clear-lenses.com /Articles/313-Corrective-Lenses.htm (426 words)

	RMV - Medical Affairs - Vision Policy Statement
		Any time an applicant or licensee uses glasses, contact lenses, or bioptic telescopic lenses (see diagram attached as "Appendix A") to meet any of the vision standards, a "B" restriction (corrective lenses) must be put on the license.
		A "B" (corrective lenses) restriction must be put on the license when corrective lenses are used to meet this standard.
		Individuals who use bioptic telescopic lenses are not eligible to receive a class M (motorcycle) learner's permit or license.
	www.mass.gov /rmv/medical/policies/vision.htm (1232 words)

	Contact Lenses - Types of Contact Lenses
		With extended wear lenses, the lenses may be worn continuously for the prescribed wearing period (for example, 7 days to 30 days) and then thrown away.
		Conventional contact lenses correct vision in the same way that glasses do, only they are in contact with the eye.
		Two types of lenses that serve a different purpose are orthokeratology lenses and decorative (plano) lenses.
	www.fda.gov /cdrh/contactlenses/types.html (940 words)

	Makrolon - Corrective Lenses (Site not responding. Last check: 2007-10-12)
		Corrective lenses made of it are almost indestructible and – very importantly – don't splinter either.
		There is no doubt that spectacles –; and thus the eyes –; are particularly at risk with children, but adults, too, need to know their eyewear is safe at all times.
		But there are other reasons why the two French companies, BNL Eurolens and Bourgeois, chose Makrolon® for their corrective lenses: the optical quality of the transparent plastic is outstanding and it is noticeably lighter than glass, ensuring optimum wear comfort.
	www.makrolon.de /BMS/DB-RSC/MakrolonCMSR6.nsf/id/Corrective_Lenses_EN (253 words)

	Non-corrective Contact Lenses to Require Prescription - Medgadget - www.medgadget.com
		Previously, decorative contact lenses were unregulated and considered a cosmetic, thus consumers could purchase lenses on the Internet, at retail and convenience stores, flea markets and even gas stations.
		Decorative contact lenses -- often with striking colors or an unusual design -- have become increasingly popular and are worn mostly, but not exclusively, by high school and college students.
		Other risks associated with the use of decorative contact lenses include conjunctivitis (an infection of the eye), corneal edema (swelling), allergic reaction and corneal abrasion due to poor lens fit.
	www.medgadget.com /archives/2005/11/noncorrective_c.html (495 words)

	Howstuffworks "How Corrective Lenses Work"
		Myopia can be corrected with a minus lens, which moves the focus farther back.
		In addition, lenses can be made to correct for double vision when the eyes do not work together ("crossed eyes").
		Corrective lenses, then, are prescribed to correct for aberrations, to adjust the focal point onto the retina or to compensate for other abnormalities.
	www.howstuffworks.com /lens2.htm (334 words)

	Contact Lenses \| AHealthyMe.com
		Soft lenses are made of flexible water-absorbing plastic that molds to fit your eyeball.
		Disposables are a little flimsier than non-disposable lenses and may be harder to get in and out of your eyes, but they don't ever need to be treated with enzymes, since you don't use them long enough for proteins to build up on them.
		Bifocal contact lenses are made so that the part that corrects for reading is located on the outer edge or weighted to sink to the bottom (so you see through it when you look down -- just as you do with bifocal glasses).
	www.ahealthyme.com /topic/contacts (816 words)

	HST: What's the problem with Hubble's vision? (Site not responding. Last check: 2007-10-12)
		But we can correct our vision by wearing glasses, or contact lenses that correct for the errors in our natural lenses.
		Corrective lenses -- that's what glasses are called -- work for the Hubble Space Telescope too.
		In 1993, NASA astronauts installed a special instrument inside the Hubble that has tiny mirrors that correct the distorted light from the primary mirror.
	www.thetech.org /exhibits_events/online/hubble/corrective.html (103 words)

	Farsightedness: Treatment - MayoClinic.com
		The goal of treating farsightedness is to help to focus light on the retina through the use of corrective lenses or refractive surgery.
		Wearing corrective lenses treats farsightedness by counteracting the decreased curvature of your cornea or the smaller size (length) of your eye.
		With monovision contacts, you may not need correction for the eye you use for distance vision (usually the dominant eye), but a contact lens can be used for close-up vision in your other eye.
	www.mayoclinic.com /health/farsightedness/DS00527/DSECTION=7 (600 words)

	FDA Issues Warning on Decorative Contact Lenses
		These precautions apply to all contact lenses, including non-corrective lenses intended solely to change the appearance of a normal eye in a decorative fashion, such as to turn brown eyes blue.
		Fortunately, most decorative contact lenses are part of product lines that include a range of corrective powers, including non-corrective lenses, which have been authorized by the Food and Drug Administration for marketing.
		Wear contact lenses only if they are fitted and prescribed by an eye-care professional such as an ophthalmologist or an optometrist.
	www.fda.gov /fdac/features/2003/103_eyes.html (853 words)

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