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Topic: Hypermetropia

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	Eye-Net - Hypermetropia or Hyperopia - Opticianry - Optometry - (Site not responding. Last check: 2007-11-07)
		Hypermetropia is not a disease, nor does it mean that you have "bad eyes." It simply means that you have a variation in the shape of your eyeball.
		Hypermetropia most commonly occurs because the eyeball is too short; that is, shorter from front to back than is normal.
		Hypermetropia is seldom diagnosed in school eye-screening tests, which typically test only the ability to see objects at a distance.
	www.eye-net.gr /english/public/optics3_eng.html (562 words)

	Health & Beauty: information and advice to make your life healthy and your body beautiful
		In hypermetropia light rays entering the eye from a distant object are focussed behind the retina (the "light catching" tissue at the back of the eye).
		Hypermetropia can occur at any age, but it is very common for newborns and infants up until around 7 years of age to have mild hypermetropia.
		Hypermetropia can be detected by an optometry refraction examination using optical lenses, and children may also require an orthoptic assessment to assess for the presence of a squint.
	ivillage.medicdirect.co.uk /diseases.asp?pid=1354&step=4 (715 words)

	SPECTACLES - LoveToKnow Article on SPECTACLES (Site not responding. Last check: 2007-11-07)
		These prisms may be combined with concave lenses, which correct the myopia, or, since a concave lens may be considered as composed of two prisms united at their apices, the same effect may be obtained by making the distance between the centres of the concave lenses greater than that between the centres of the pupils.
		Again, to obviate the necessity for excessive convergence of the eyes so common in hypermetropia, the centre of the pupil should be placed outside the centre of the corrective convex lenses; these will then act as prisms with their bases inwards.
		Convex Lenses.Irl hypermetropia the retina is in front of the principal focus of the eye.
	53.1911encyclopedia.org /S/SP/SPECTACLES.htm (1335 words)

	Operation apparatus for correcting ametropia with laser beam - Patent 5620437 (Site not responding. Last check: 2007-11-07)
		The mask for correction of hypermetropia is consisted of a center part which more absorbs and less transmits laser beam and a peripheral part which more transmits and less absorbs laser beam, so that the surface of the cornea is eliminated as concave lens shape.
		A plurality of the images of the lobe of the laser beam passed through the aperture of the diaphragm are intermittently formed on the cornea to eliminate the surface of a cornea by thickness necessary to correct ametropia, accordingly, the curvature of the cornea is changed according to eliminated part of the cornea.
		The aperture of the diaphragm utilized for correction of hypermetropia is formed in a lobe shape having large width at a part corresponding to the peripheral part of the cornea, so that the periphery of the cornea may be ablated more greatly than the center.
	www.freepatentsonline.com /5620437.html (3165 words)

	Corrective lens - Wikipedia, the free encyclopedia
		A corrective lens is a prosthetic lens worn on or before the eye, used to treat myopia, hypermetropia, presbyopia and astigmatism.
		Similarly a person with hypermetropia would have one section of the lens with a certain converging power and another section with a greater power for close-up work.
		It is essential for those who wear eyeglasses or contact lenses to consult their optometrists regularly to ensure that their prescription remains constant, especially in the case of children.
	en.wikipedia.org /wiki/corrective_lens (263 words)

	Imagination Blindness - Perfect Sight Without Glasses - Chapter 6
		According to the theory, atropine ought to bring out latent hypermetropia in eyes either apparently normal, or manifestly hypermetropic, provided, of course, the patient is of the age during which the lens is supposed to retain its elasticity.
		When atropine was instilled into this eye the hypermetropia was increased to four and a half diopters, and the vision lowered to 20/200.
		Equally, if not more remarkable, was the case of a little girl of six who had two and a half diopters of hypermetropia in her right or better eye, and six in the other, with one diopter of astigmatism.
	www.iblindness.org /books/bates/ch6.html (1298 words)

	The Turkish Journal of Pediatrics
		Hypermetropia was found in 9.6% of the children, while myopia was found in 5.8%.
		The average prevalence of hypermetropia at seven years is 19.1% and at 15 years is 3.6%[16].
		The high rate of hypermetropia, which involves accommodative difficulties and possible consequent amblyopia, is of uncontestable importance, because hypermetropia may retard the ability of deaf children to lip-read a problem not encountered in children with normal hearing[1].
	tjp.dergisi.org /text.php3?id=32 (2083 words)

	Welcome To David Arnold Opticians Website
		Low degrees of Hypermetropia are usually unproblematic with higher degrees causing uncomfortable vision particularly with visually demanding tasks and sometimes even resulting in squints in young children.
		Hypermetropia is common in children who may outgrow the condition as their eyes enlarge.
		It usually develops in children with uncorrected hypermetropia, myopia, or astigmatism particularly if there is a significant difference in degree of condition between the two eyes (known as anisometropia).
	www.david-arnold.co.uk /conditions.htm (1131 words)

	Eye disease, eye question, eye problem, eye condition, Dr. Ravin N. Das, refractive errors, errors of refraction, ...
		At birth practically all eyes are hypermetropic to the extent of 2.5 to 3.0 Diopters and as the growth of the body proceeds, the lenght of the eye increases until adolescence is passed, the eye should theoretically be "normal" in size and refraction.
		Hypermetropia can also occur due to change in refractive index of the crystalline lens of the eye, as in cataract, or due to injury to the eye with dislocation of the crystalline lens of the eye.
		The earliest symptoms of uncorrected hypermetropia are "eye-strain", "watering", "redness" of the eyes, and often headaches in the later part of the day.
	www.eyequestions.com /re.htm (1452 words)

	Better Eyesight : The Cause and Treatment of (Site not responding. Last check: 2007-11-07)
		In some cases the hypermetropia is completely relieved and emmetropia is produced, with a complete disappearance of all evidences of strain.
		This operation usually produces a condition of hypermetropia, but when there has previously been a condition of high myopia the removal of the lens may not be sufficient to Correct it and the eye may still remain myopic.
		In the first case a strain to see at the distance lessens the hypermetropia and a strain to see at the near-point increases it; in the second a strain to see at the distance increases the myopia and a strain to see at the near-point lessens it.
	www.indiangyan.com /books/healthbooks/better_eyesight/cause_and_treatment_of.shtml (2214 words)

	Hyperopia - Wikipedia, the free encyclopedia
		Hyperopia, also known as hypermetropia or colloquially as farsightedness or longsightedness, is a defect of vision caused by an imperfection in the eye (often when the eyeball is too short), causing inability to focus on near objects, and in extreme cases causing a sufferer to be unable to focus on objects at any distance.
		If the power of the cornea and lens is insufficient, as in hypermetropia, the image will appear blurred.
		According to an American study published in Archives of Ophthalmology, nearly 1 in 8 children between the ages of 5 and 17 have hyperopia [1], however, a recent Brazilian study found that nearly 7 in 10 (71%) of the students in one city were hyperopic [2].
	en.wikipedia.org /wiki/Hypermetropia (195 words)

	Lasik Laser Vision Correction Treatment Centre For Myopia,Hyperopia,Astigmatism,Hypermetropia Mumbai,India. (Site not responding. Last check: 2007-11-07)
		We can define hypermetropia as that form of refractive error in which parallel rays of light are brought to a focus some distance behind the sentient layer of the retina when the eye is at rest; the image formed here is therefore made up of circles of diffusion of considerable size, and is consequently blurred.
		Hypermetropia, while it is physiological in children, represents from the biological standpoint an imperfectly developed eye when it persists into adult life.
		Index hypermetropia : if the refractive index of the aqueous humour be too low, or that of the vitreous humour too high or the refractive index of the lens is too low, there will be an index hypermetropia.
	www.lasikindia.com /html/eyetest-mid.htm (1317 words)

	En inglés
		If there is a great deal of accommodation(as it happens when being a child)and the amount of hypermetropia is not too big, the referred effort would not be even noticed..
		If both the amount of hypermetropia and possible accommodation are big, we will have a good vision, but then astenopic bothers may appear (that is, ocular weariness, headaches, ocular irritation, etc.).
		As it comes to logic, during the childhood period there is hypermetropia because the eye is small and it is. This is decreasing as time goes —with the growth of the eye—until it reaches a stable state at the age of seven or eight.
	www.tarso.com /hipereng.html (670 words)

	Refractive Errors
		The remainder have a larger degree of refractive error in the form of short-sight (myopia) or long-sight (hypermetropia), with or without a degree of astigmatism and require a refractive correction to achieve good distance vision.
		Hypermetropia occurs when the refractive components of the eye are too weak for its length with the result that light rays attempt to focus behind the retina (figure 3).
		Hypermetropia does not always require correction because young patients can accommodate to overcome part or all of their long sight, hence achieving good distance vision.
	www.bsrs2000.fsnet.co.uk /new_page_8.htm (2287 words)

	Eyes - laser eye surgery
		Laser corneal sculpting is a medical procedure that involves the use of laser to reshape the surface of the eye.
		This is done to improve or correct myopia (short-sightedness), hypermetropia (long-sightedness) and astigmatism (uneven curvature of the eye's surface).
		Hypermetropia is more common than myopia but tends to cause vision problems more commonly in people over 40.
	www.betterhealth.vic.gov.au /BHCV2/bhcarticles.nsf/pages/Eyes_laser_eye_surgery?open (1101 words)

	Myopia and Hypermetropia
		Myopia is characterised by a slight elongation of the eyeball, causing the image to fall in front of the retina, while hypermetropia is characterised by a slight shortening of the eyeball, causing the image to fall a little behind the retina.
		Wearing glasses is not supposed to either improve or worsen the condition, but it is held that correction is essential in hypermetropia to prevent squint and eyestrain which would otherwise be caused by excessive efforts to shorten the focus.
		Reductions in manifest hypermetropia of up to 7D (+7 to normal) have been experienced without any adverse sequeliae such as squints or strain - on the contrary, parallel improvements have been noted in other areas of performance.
	www.seeing.org /visiontd/advanced/myopehyp.htm (378 words)

	Information on hypermetropia
		See Hypermeter.] An abnormal condition of the eye in which, through shortness of the eyeball or fault of the refractive media, the rays of light come to a focus behind the retina, making vision for distant objects better than for near objects; farsightedness; -- now most commonly called hyperopia.
		[1913 Webster] Note: In hypermetropia, vision for distant objects, although not better absolutely, is better than that for near objects, and hence, the individual is said to be farsighted.
		hypermetropia n : abnormal condition in which vision for distant objects is better than for near objects [syn: hyperopia, hypermetropy, farsightedness, longsightedness] [ant: myopia]
	www.wkonline.com /d/hypermetropia.html (203 words)

	Perfect Sight Without Glasses - Chapter IX - www.Central-Fixation.com (Site not responding. Last check: 2007-11-07)
		If it was elongated to start with, it may pass rom this condition through emmetropia, in which it is spherical, to hypermetropia, in which it is flattened; and if these changes take place unsymmetrically, astigmatism will be produced in connection with the other conditions.
		The eye which strains to see at the distance, on the contrary, becomes longer than it was before in one or all meridians, and may pass from the flattened condition of hypermetropia, through emmetropia, to the elongated condition of myopia.
		In the first case a strain to see at the distance lessens the hypermetropia, and a strain to see at the near-point increases it; in the second a strain to see at the distance increases the myopia, and a strain to see at the nearpoint lessens it.
	central-fixation.com /perfect/chapter9.htm (2876 words)

	Intraocular lens for correcting moderate to severe hypermetropia - Patent 5766245 (Site not responding. Last check: 2007-11-07)
		The method of claim 25, wherein said eye comprises: an anterior chamber, a posterior chamber, a cornea anterior to said chambers, an iris between the anterior chamber and the posterior chamber defining a pupil region, a ciliary body within the posterior chamber and a natural crystalline lens within the posterior chamber.
		The method of claim 32, wherein said eye comprises: an anterior chamber, a posterior chamber, a cornea anterior to said chambers, an iris between the anterior chamber and the posterior chamber defining a pupil region, a ciliary body within the posterior chamber and a natural crystalline lens within the posterior chamber.
		The ratio between the thickness of the body portion and the height of the body portion cannot be less than 0.011, because if the ratio is less, the intraocular lens decentralizes and, if the ration is greater than 0.015, the intraocular lens traumatizes the tissue of the ciliary body.
	www.freepatentsonline.com /5766245.html (3008 words)

	Statements of Principles — Myopia, hypermetropia and astigmatism — balance of probability (Site not responding. Last check: 2007-11-07)
		"hypermetropia" means a refractive error in which rays of light entering the eye parallel to the visual axis come to focus behind the retina in the unaccommodated eye, attracting ICD-9-CM code 367.0 and excludes temporary changes to refraction;
		On the sound medical-scientific evidence available, the Repatriation Medical Authority is of the view that it is more probable than not that myopia, hypermetropia or astigmatism and death from myopia, hypermetropia or astigmatism can be related to relevant service rendered by veterans or members of the Forces.
		"death from myopia, hypermetropia or astigmatism" in relation to a person includes death from a terminal event or condition that was contributed to by the person’s myopia, hypermetropia or astigmatism;
	www.dva.gov.au /pensions/statemnt/f076bp.htm (1201 words)

	Eyes : The Truth About Accommodation (Site not responding. Last check: 2007-11-07)
		In order to eliminate all possibility of latent hypermetropia in the left eye which in the beginning had six diopters-the atropine was now used in this eye and discontinued in the other, the eye education being continued as before.
		Under the influence of the drug there was a slight return of the hypermetropia; but the vision quickly became normal again and although the atropine was used daily for more than a year, the pupil being continually dilated to the maximum, diamond type was read at six inches without glasses during the whole period.
		It is difficult for me to see how the ciliary muscle could have had anything to do with the ability of this patient to accommodate after atropine had been used in each eye separately for a year or more at a time.
	www.indiangyan.com /books/healthbooks/better_eyesight/truth_about_accommodation.shtml (943 words)

	ACES Eye Surgery
		Hypermetropia is caused by one or a combination of the following:
		Laser surgery corrects hypermetropia by making the cornea steeper so the rays of light are refocussed on the back of the eye.
		There is a limit on the degree of hypermetropia that can be fully corrected, approximately 6 dioptres.
	www.aceseyesurgeons.co.uk /hypermetropia.html (136 words)

	Matheson Optometrists (Site not responding. Last check: 2007-11-07)
		If you can see objects at a distance clearly but have trouble focusing well on objects close up, you may have long-sight (also known as hypermetropia, hyperopia, and far-sight).
		Children who are farsighted may find reading difficult and can develop a convergent squint(go cross-eyed) or a lazy eye (amblyopia).
		Exactly why eyeball shape varies is not known, but the tendency for hypermetropia is inherited.
	www.ocularsolutions.com /Information/long_sight.htm (346 words)

	EYE DOCTOR-surgeon ophthalmologist in Greece, Thessaloniki (Site not responding. Last check: 2007-11-07)
		The first application of Laser for the correction of Myopia was performed in 1987 in U.S.A.,while for Hypermetropia the application of Laser began much more later.
		Today the correction of Myopia, Hypermetropia and Astigmatism are performed by applying at line of preference the techniques: Lasik, Prk and Lasek.
		The choice of the proper technique rests within the crisis of doctor which is based on the collected data during the preoperative examination of the patient.
	www.eyedoctor.gr /miop.html (165 words)

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