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The Ohio State University
Ottobre
2005 |
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Lenti a contatto RGP
e progressione miopica
Di Walline et al |
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| Studio scientifico sull'effettivo
controllo della progressione miopica ottenuto con lenti a contatto semirigide |
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 http://www.nei.nih.gov/neitrials/viewStudyWeb.aspx?id=81
http://archopht.ama-assn.org/cgi/content/full/122/12/1760
(a pagamento)
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Contact Lens Spectrum
Ottobre
2005 |
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Lenti a contatto RGP
e controllo miopico, dove siamo?
Di Effrey J. Walline, OD, PHD |
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| Review degli studi sull'effetto
di controllo miopico nei portatori di lenti a contatto RGP |
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http://www.clspectrum.com/article.aspx?article=&loc=archive\2005\october\1005052.htm |
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Contact Lens Spectrum
March
2003 |
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Orthokeratology and
Adolescent Myopia Control
By Thomas R. Reim, OD, Max Lund, OD, and Richard Wu, OD |
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| This study set out to
determine whether overnight wear of an orthokeratology lens would affect
the progression of myopia in young people. |
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http://www.clspectrum.com/archive_results.asp?article=12316&sub=1007 |
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Singapore Medical
Journal
Vol. 40(4), 1999: 230-237 |
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A 3-Year Study on
the Effect of RGP Contact Lenses on Myopic Children
Khoo C. Y., Chong J., Rajan U. |
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Abstract:
Aim and Background: Recent studies in the West
have shown that rigid gas-permeable (RGP) contact lenses can control the
progress of myopia in children. These studies were done on Caucasian children,
whose myopias are less rapidly progressive than those which we see in Singaporean
children. This three-year study was started in 1993, with the following
objectives: 1. To verify whether RGP contact lenses can control the progress
of myopia in Singaporean children. 2. If so, to investigate the mechanism
by which the lenses control myopia; whether by corneal flattening or by
reducing the growth of the axial length. 3. If so, to assess if the effects
are permanent, by discontinuing lens wear.
Materials and Methods: The study was carried
out at the Eye Clinic of the School Health Service. Enough school children
were referred to the clinic from the various schools to achieve about 100
children wearing contact lenses. Past studies showed that the drop-out rate
would be 50%, as there is no cosmetic motivation in 10 year-old children
to wear contact lenses. The successful wearers were those who had parental
encouragement and support.
Results: The results show that there was a
suppression of the progress of myopia in children wearing the lenses as
compared to their counterparts wearing spectacles. However, only in ten
eyes was there arrest of the myopia. For the lenses to be effective, they
needed to be worn regularly for about eight hours a day. Reasons for the
drop-outs included lack of motivation, lens intolerance and simply being
too busy with the school curriculum. Discontinuance of lens wear for more
than 2 months had minimal effect on the refraction, indicating that the
controlling effect was not due purely to corneal change.
Conclusion: It is recommended that more studies
be done to confirm the findings of this study. Children with rapidly progressive
myopia can wear rigid gas-permeable contact lenses to reduce the progression.
Keywords: rigid gas-permeable contact lenses,
myopia, autorefraction, axial length, corneal flattening |
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http://www.sma.org.sg/smj/4004/articles/4004a1.html |
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Optometry and Vision
Science
1999 Jul; 76(7):474-9 |
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Myopia progression
in adolescent wearers of soft contact lenses and spectacles.
Horner DG, Soni PS, Salmon TO, Swartz TS. |
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Abstract:
The purpose of this 3-year, randomized clinical trial was to determine the
difference in myopia progression in adolescents wearing soft contact lenses
over a control group wearing spectacles. A total of 175 adolescents between
the ages of 11 and 14 years were randomized into 2 groups, spectacle wearers
and soft contact lens wearers. The main result was that the spherical equivalent
change between the groups showed no clinical or statistically significant
difference. However, when a power vector analysis was used, which uses all
the refractive error data, a small but statistically significant (F test
= 4.24, T2 = 17.35, p < 0.01) difference between the groups was found
(i.e., the refractive error of the spectacle wearers had a slight increase
in astigmatism). It can be concluded that soft contact lens wear does not
lead to additional myopia progression in adolescents. |
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http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10445639&dopt=Abstract |
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Contact Lens Spectrum
Aug. 1986, 83. |
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Myopia Control for
the Younger Generation
Paige N. |
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Abstract:
Noting the disagreement about when to begin orthokeratology, the author
recommends beginning Ortho-K after 15-16 years of age when the eye "is
fully grown". He suggests fitting young patients less than 15-16 years
of age for myopia control by fitting them 1.25 diopters flatter than "K"
for the purposes of "containing and preventing myopic progression"
until they reach the age that full Ortho-K should be initiated. (Now, however,
we begin fitting myopes for myopia control at ages 7-8) |
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http://www.westol.com/pfkod/doctors/biblio.html |
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Br J Physiol Opt.
1977, 89-114. |
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The Possible Influences
of Contact Lenses on Myopia
Stone J. |
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Abstract:
Author describes her methodology and results in a 5 year investigation into
the effects of rigid PMMA lenses, fit slightly steeper than "K",
on myopic progression. At the conclusion of the 5 year myopia control study,
comparing spectacle manifest refractions, the spectacle wearers increased
in myopia by -1.86D. (-0.368D/yr.) while contact lens wearers increased
in myopia by -0.41 D. (-0.082D/yr.), which indicates an average reduction
in myopic progression of 78% per year for contact lens wearers which is
statistically significant. As the rate of progression is only partially
attributable to corneal flattening, "it is suggested that there is
some retarding effect on axial elongation". |
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http://www.westol.com/pfkod/doctors/biblio.html |
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Optometry and Vision
Science
1990 Oct; 67(10):764-9 |
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Silicone-Acrylate
Contact Lenses for Myopia Control: Three-Years Results
Perrigin J., Perrigin D., Quintero S., Grosvenor T. |
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http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2247299&dopt=Abstract |
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Ann. Ophthalmol.
1990 Jun; 22(6):224-7, 229. |
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Long-term effects
of hydrophilic contact lenses on myopia
Andreo LK. |
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http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2369034&dopt=Abstract |
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Optometric Weekly
1956; 47, 1487-1488. |
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Contact Lenses and
the Progression of Myopia
Morrison R. J. |
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http://www.westol.com/pfkod/doctors/biblio.html |
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Contact Lens Forum
Jan. 1985. 49-50 |
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Myopia Control: The
Other Side of the Ortho-K Coin
Paige N. |
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http://www.westol.com/pfkod/doctors/biblio.html |
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Optometry and Vision
Science
1999 Jun; 76(6):363-9. |
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Effects of spectacle
intervention on the progression of myopia in children
Ong E., Grice K., Held R., Thorn F., Gwiazda J. |
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http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10416930&dopt=Abstract |
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