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►角膜塑型術治療近視二年追蹤報告◄
第二屆世界華人眼科學術大會
June
14~17, Taipei International Convention Center, Taipei, Taiwan
ABSTRACT
FORM
角膜塑型術治療近視二年追蹤報告
張朝凱、陳美齡＊、林煥昇＊＊
台北博仁醫院、台北縣立板橋醫院＊、台北諾貝爾眼科診所＊＊
Purpose：The
safety and effectiveness of orthokeratology on the myopia reduction has
been confirmed by various researchers. The objective of this investigation
is to determine whether the orthokeratology effect on myopic reduction can
be maintained long term.
Method：We
investigated 40 myopic patients (80 eyes) ranged in age from 6 to 22
years, myopic refractive error ranged from –1.00 to –11.50 D and UCVA
ranged from 20/50 to 20/2000. All subjects wore well-fitted ortho-k
contact lenses (orthofocus B, Metro Optic, USA) and were monitored
periodically for 2 years. At each follow up visits, the change of
refractive error and UCVA were measured and recorded. ANOVA was used to
examine these changes over time.
Results：Myopia
was significantly reduced over 3 month study period (P<0.001, ANOVA) and
followed a linear trend over time (P<0.005, trend analysis). The average
reduction was 385.79 diopters with a range from –1.00 to –9.00 diopters.
A total of 14(37%)eyes achieved a visual acuity of 20/20 or better and
20 (46%) eyes achieved 20/40 or better. If the patients stopped lens
wear due to non-lens related problem, the myopia didn’t revert to the
pre-treatment level. When the lens wear resumed, the myopia reduced to
the previous ortho-k treated level.
Conclusion：Myopia
progresses most rapidly during adolescent stage if leave it untreated. The
findings of this investigation suggest that the orthokeratology may be
applied as a very effective alternative method to control and prevent
myopia progression throughout the adolescent stage. Lens centration,
comfort, visual quality and corneal integrity should be maintained at all
times of lens wear.
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