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NR. 2/2006
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Ocena wpływu
noszenia soczewek ortokorekcyjnych na postępowanie
krótkowzroczności u dzieci
Orthokeratology Influence
upon the Progression of Myopia in Children
Oxana Borissova, Ewa Pelczar
Wrocławskie Eye Laser Center
Kierownik: lek. med. Ewa Pelczar |
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| Summary: |
Orthokeratology is a
procedure using reverse-geometry gas-permeable lenses
for the temporary reduction of myopia. Since the 1960s,
rigid contact lenses have been found to control myopia.
Purpose: We wanted to see whether the overnight
wear of CKR (Controlled Kerato-Reformation) for
orthokeratology would have a similar effect of myopia
stability.
Material and methods: A total number of 74
patients were enrolled in this clinical study, 33 males
and 41 females, 146 eyes, age between 9 and 18 y.o. The
myopia varied from -1.75D to -6.75 D. 74 patients used
ortholenses regularly during 1 year with very good
effect of myopia correction, without any complications;
after that period we asked them to take about 1-month
break in CKR use. Refraction and topography (Optivision
CornealMap EH 300) was checked after 4-weeks of
orthokeratology break. We compared refraction and
keratotopography data before ortokerathology procedure
and after 1 and 2 years of orthocorrection, waiting 1
month for the cornea reshaping each year.
Results: An average myopia before orthocorrection
was -3.76 Dsph -0.37 Dcyl, keratotopography data were Ks
43.71D/ Kf 42.97. After 1 year of orthocorrection,
patients had 1-month break, waiting for the cornea
reshaping, which ended with an average refraction -3.66
Dsph -0.49 Dcyl and Ks 43.33/ Kf 41.95. The group of 8
patients, who used ortholenses for more then 2 years,
had average refraction -4.31 Dsph -0.34 Dcyl and Ks
43.56/ Kf 42.72 before orthocorrection. After 1 year of
orthotreatment they had overage refraction -4.11 Dsph
-0.58 Dcyl and topography data Ks 43.18/ Kf 42.34. After
2 years of orthotreatment they had overage refraction
-4.36 Dsph -0.55 Dcyl and topography data were Ks 43.28/
Kf 42.35.
Conclusion: This study indicates that
orthokeratology using the CKR design may reduce the
progression of myopia in young people. |
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| Key words: |
Myopia, Orthokeratology,
Ortholens, CKR, Corneal topography. |
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