
	Where results make sense

Topic: Corrective lens

Related Topics

Lens (optics)

Intraocular lens

Lazy eye syndrome

Astigmatism

Myopia

Movie projector

Eye patch

Visual perception

Dermatology

Beijing Municipality

Colonial America

Severiano Ballesteros

Pablo Picasso

Film

Adam Weishaupt

In the News (Thu 3 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Lens
		If the lens is biconvex or plano-convex, a collimated or parallel beam of light passing along the lens axis and through the lens will be converged (or focused) to a spot on the axis, at a certain distance behind the lens (known as the focal length).
		The beam after passing through the lens appears to be emanating from a particular point on the axis in front of the lens; the distance from this point to the lens is also known as the focal length, although it is negative with respect to the focal length of a converging lens.
		Chromatic aberration is caused by the dispersion of the lens material, the variation of its refractive index n with the wavelength of light.
	www.ebroadcast.com.au /lookup/encyclopedia/le/Lense.html (1514 words)

	Detachable corrective lens assemblies - Patent 6027214
		The lens assembly according to claim 1, wherein the means for detachably mounting the frame to a pair of base eyeglasses comprises a pinch clip located in proximity to the bridge piece of the frame.
		While the lens assembly of the present invention is generally used with a pair of base eyeglasses having corrective lenses, the lens assembly may also be mounted on a pair of base eyeglasses that has plano, or non-corrective lenses, such as non-prescription sunglasses or safety glasses, to provide correction to the pair of base eyeglasses.
		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.
	www.freepatentsonline.com /6027214.html (5082 words)

	Definition of Lens
		where n is the refractive index of the lens material, n' is the refractive index of the medium which the lens is in and d is the distance along the lens axis between the two surfaces (known as the thickness of the lens).
		The plane perpendicular to the lens axis situated at a distance f from the lens is called the focal plane.
		In general, a bundle of parallel rays passing through the lens at a fixed distance from the centre of the lens are focused to a ring-shaped image in the focal plane, known as a comatic circle.
	www.solarisnetwork.com /term_Lens (2197 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.
		Aside from thinness of the lens, another advantage of high-index plastics is their strength and shatter resistance, although not as shatter resistant as polycarbonate.
	en.wikipedia.org /wiki/Corrective_lens (2372 words)

	Stuffo "How Corrective Lenses Work" (Site not responding. Last check: 2007-10-11)
		Corrective lenses can be made with glass or plastic, but nowadays, plastic is the most common.
		Often the optical center of the lens is made slightly above the segment edge, and the line is marked the appropriate distance.
		Step 3: Since the front of the lens will be left as is, it is covered by a special tape to protect it.
	www.stuffo.com /lens7.htm (273 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.
		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.
		Some researchers are speculating that in the future vision correction may eventually be as simple as placing drops in the eyes to form instant contact lenses.
	www.nvo.com /icaredoc/files (1132 words)

	Gimbel Eye Centre \| Vision Correction Options :: Advanced Correction Techniques—Implantable Lenses
		Correction for very high degrees of nearsightedness and farsightedness (Low and moderate ranges of nearsightedness, farsightedness and astigmatism are also correctable with implantable lenses)
		Important Note: The Implantable Lens correction procedure was approved by the Health Protection Branch of the Canadian Federal government in June 2001 and by the US FDA in January 2006.
		The surgeon then inserts an open or a folded implantable lens through the incision and carefully positions it behind the cornea, in front of the eye’s natural lens.
	www.gimbeleyecentre.com /visioncorrectionoptions/implantablelenses.html (768 words)

	Essilor Canada
		Choosing a corrective lens can be related to an ordinary experience, because the choice can be perceived as undifferentiated.
		A corrective lens, beyond its appearance and the fact that it is custom made, can integrate highly sophisticated levels of technology.
		The lens that corrects myopia, hyperopia and astigmatism is a single vision lens.
	www.essilor.ca /en/consommateurs/verre/verre.asp (277 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.
		Eyewear has been revolutionized with the invention of the contact lens, corrective lenses without the frames, which put a tiny corrective lens directly on the cornea of the eye.
	www.bookrags.com /Corrective_lens (1516 words)

	Laser Vision Correction, Refractive Surgery, LASIK - Western Massachusetts
		The lens is implanted inside a patient’s eye where it acts like a pair of glasses or contacts to refocus light rays onto the retina to correct the patient’s vision.
		The Verisyse lens may be used in patients who are over 21 years of age with between 5 and 20 diopters of nearsightedness with up to 2.5 diopters of astigmatism.
		The ReZoom lens implant is used to correct the vision of patients who have cataracts or those patient’s who are experiencing difficulty with up-close or intermediate vision.
	www.balineye.com /html/lasik.html (2962 words)

	Gimbel Eye Centre \| Technology :: Lens Implant Options
		The refractive principles of the Implantable Corrective Lens are well proven, they are the same as those used with glasses and contact lenses.
		The procedure directly implants a lens made of biocompatible material directly behind the iris and in front of the eye's natural lens.
		Other complications associated with ICL procedures are reflections or slight distortions from the lens implant; an increase in the number, shape or size of floaters; potential for early cataract development; loss of corneal clarity; wound leak; pigment dispersion glaucoma and uveitis (i.e., inflammation).
	www.gimbeleyecentre.com /technology/impl-icl.html (789 words)

	Maloney Vision Institute: In the Media - Laser Eye Surgery, Lasik Eye Surgery, Lasik Surgery, Lasik Surgeon
		The Verisyse lens is an implantable micro lens which is implanted between the cornea and iris (the colored part of the eye).
		The lens is centered over the pupil and held in place with tiny fasteners.
		FDA is expected this month to approve the Verisyse Lens for the correction of severely myopic (nearsighted) patients -5 diopters to -20 diopters.
	www.maloneyvision.com /why/releases/microLens.html (280 words)

	The Washington Times: Metropolitan (Site not responding. Last check: 2007-10-11)
		Grinding the lens so that the thickest part is the outer edge and the thinnest is the middle — making a concave shape — creates a minus lens designed for a nearsighted person.
		The light will bend toward the thicker portion of the lens, and because the concave lens is thicker at its edge, this type of lens will spread the light from the center and move the focal point farther back.
		Before the lens is sent to an optician for framing and other finishing work, its prescription is inspected using a lensometer, which shows if it has the right strength.
	www.washtimes.com /metro/20030521-094819-2313r.htm (1097 words)

	Welcome to Kelly Eye Center - Implantable Contact Lens (Site not responding. Last check: 2007-10-11)
		The ICL is a corrective lens also known as a phakic IOL.
		Phakic means that the natural lens of the eye is in place and IOL is an intraocular lens, which is a lens inside the eye.
		The ICL is placed behind the iris and in font of the natural lens.
	www.kellyeyecenter.com /icl.htm (313 words)

	Contact lens - Wikipedia, the free encyclopedia
		A toric lens is one in which either or both of the optical surfaces have the effect of a cylindrical lens, usually in combination with the effect of a spherical lens.
		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.
		When the lens first contacts the eye, a brief period of irritation may ensue as the eye aclimatises to the lens and also (if a multi-use lens is not correctly cleansed) as dirt on the lens irritates the eye.
	en.wikipedia.org /wiki/Contact_lens (4308 words)

	I-CARE MEDICARE EYE SURGERY >> SERVICES >> CORRECTIVE LENS IMPLANTS
		Implants are a tiny lens which is placed inside the eye in a manner similar to that used for cataract patients.
		The lens is inserted through a small incision in the side of the cornea and sits in front of the eye's natural lens, just behind the cornea.
		The benefits of this method are that the treatment is pain free as it is conducted under a general anesthetic, and also the visual recovery is fast with very good visual acuity results and the success rate is very good.
	www.habazar.com /icaremedicare/lens_implants.htm (579 words)

	Crystalens (Site not responding. Last check: 2007-10-11)
		Standard (single vision) lens implants don’t have the ability to provide a full range of vision.
		This means the crystalens can provide sharper vision, without corrective lenses, throughout a full range of vision from near to far and everything in between.
		The crystalens FDA one-year clinical study results indicate that 92% of the people enrolled in the study (implanted bilaterally) could see 20/25 or better at distance, 96% could see 20/20 at arm’s length and 73% could see 20/25 at near without glasses or contact lenses.
	www.crystalens.com /introducing/advantages.asp (257 words)

	The Global Corrective Lens Market
		Growth of the ophthalmic lens market is driven by both growth in volume and growth in value.
		Growth in volume is determined by global demand for corrective lenses.
		Growth in value is determined by technological advances in corrective lenses resulting from developments and innovations in the related optical surface, materials and treatment segments.
	www.essilor.com /OurBusiness/market.htm (172 words)

	What You Should Know About Refractive Errors and Corrective Lens Prescriptions
		However, if the person has a condition which causes damage to the structures of the eye or part of the brain which is involved in seeing, vision may still be poor.
		Correcting refractive errors is important for people with visual impairments because it enables them to maximize the use of the vision they have and to see things as accurately as possible.
		The number represents only the strength of the lens and does not indicate how well the person will be able to see while wearing the lens.
	blindness.growingstrong.org /eyes/lenses.html (663 words)

	Corrective Lenses
		When the imperfect curvature affects the lens, located inside the eye, the condition is lenticular astigmatism.
		Often, the condition is not pronounced enough to require vision correction.
		The goal of treating astigmatism is to correct the eye's uneven curvature.
	www.clear-lenses.com /Articles/313-Corrective-Lenses.htm (426 words)

	[No title] (Site not responding. Last check: 2007-10-11)
		A contact lens is a corrective or cosmetic 7 (optics)">lens placed on the cornea of the eye atop the iris.
		they are weighted to keep the 1 lens in a 4 stable position regardless 5 of eye movement.
		5 Typically, the lens is 2 weighted more at the 7 bottom and is marked 6 by tiny striations 1 so the wearer 1 can insert them in 6 the correct position.
	www.thecontactlens.net (567 words)

	UK Keratoconus - Corrective Contact Lens
		UK keratoconus patients have found the Rose K lens to be a very comfortable fitting lens resulting in better sight (visual acuity).
		They provide excellent tear exchange behind the lens and also allow the cornea to breathe directly through the lens providing an optimum environment for the corneal epithelium.
		The Rose K™ lens is internationally recognized as the leading and most prescribed rigid lens for UK keratoconus.
	www.roseklens.com /_uk_keratoconus.htm (327 words)

	Choosing Prescription Lens for swimming goggles
		The selection of appropriate corrective lenses for the swimming goggles does require some understanding of your visual acuity requirements and your most recent prescription.
		Silicone seals are basically "suction devices", if properly positioned over the eye you can gently push in on the lens and the seal should form a small vacuum under the cup when you release the pressure.
		The corrective lenses in these swimming goggles do not have correction for cylinder and are not a direct match for your regular prescription but are more than adequate for temporary use.
	www.aquagoggles.com /ChooseLens.htm (681 words)

	Corrective Eye Surgery, Vision Correction, LASIK Eye Surgeon - FAQs - Springfield Area, Western Massachusetts
		Because numbing drops are used during the vision correction procedure, the surgery itself is painless.
		Although insurance rarely covers the cost of a vision correction procedure, affordable financing is available.
		She was the first LASIK eye surgeon to perform these vision correction procedures in Western Massachusetts.
	www.balineye.com /html/faq.html (1161 words)

	Types of Contact Lenses
		The idea of applying a corrective lens directly to the surface of the eye was first proposed as early as
		Typically, the lens is weighted more at the bottom and is marked by tiny striations so the wearer can insert them in the correct position, or they are designed in such a way that blinking will reset the lens to the correct orientation.
		Piggybacking contact lenses refers to the wearing of a smaller, rigid lens atop a larger, soft lens.
	www.edinformatics.com /inventions_inventors/contact_lenses.htm (1020 words)

	Senior Driver Information - Vision Test
		There will be no lens restriction if you passed the vision test without glasses or corrective contact lenses.
		Bioptic Telescopic Lens Wearers — If your vision specialist has prescribed a bioptic telescopic lens for you, you may not wear your lens to pass the vision test.
		Monovision — If you have monovision (one eye corrected for distance vision and one eye treated or untreated for close-up vision) and DMV has no record of your vision condition, the DMV employee will give you a Report of Vision Examination (DL 62) and ask you to see your vision specialist.
	www.dmv.ca.gov /about/senior/driverlicense/vision.htm (818 words)

	Patterns of Vision Care Among Medicaid-Enrolled Children -- Kemper et al. 113 (3): e190 -- Pediatrics
		and ophthalmologists or the dispensing of corrective lenses.
		overcoming barriers to the correction of visual impairment.
		Prevalence and distribution of corrective lenses among school-aged children.
	pediatrics.aappublications.org /cgi/content/full/113/3/e190 (3378 words)

	EyeGlassLenses.com Knowledgebase: The Eye and Simple Lenses
		Nearsightedness is corrected using a diverging lens (concave or
		To correct for astigmatism, a cylindrical surface is ground with a
		The lens to correct astigmatism is sometimes called a sphero-cylinder.
	www.eyeglasslenses.com /content/knowledgebase/kb_eyeandlenses.asp (800 words)

Try your search on: Qwika (all wikis)