Photodiagnosis and photodynamic therapy · 2026
Comparing myopia control efficacy and corneal power changes in children wearing corneal refractive therapy (CRT) and vision shaping treatment (VST) orthokeratology lenses with smaller back optic zone diameters.
СтатьяСравнительное исследованиеНазвание и аннотация: Перевод в очереди
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Li Na, Jiang Wenting, Wang Na, Cai Zhaoying, Du Bei, Lin Weiping, Wei Ruihua
Аннотация
PURPOSE: To compare axial length (AL) elongation and relative corneal refractive power (RCRP) changes in children wearing corneal refractive therapy (CRT) and vision shaping treatment (VST) lenses with smaller back optical zone diameters (BOZD).
METHODS: This retrospective study included136 eyes from children aged 8-11 years, having myopia of -0.50 to -3.00 D, which were fitted with two types of orthokeratology (OK) lenses: 5.0 mm-BOZD CRT and 5.6 mm-BOZD VST. The analysis detected AL at baseline, 6 months, and 12 months. The treatment zone size (TZS), treatment zone decentration (TZD) and RCRP parameters were obtained through analyzing the corneal topography maps obtained at baseline and after 1 year.
RESULTS: The AL increase in the 5.6 mm-BOZD VST group was significantly slower than the 5.0 mm-BOZD CRT group (6 months: 0.09 ± 0.08 mm vs. 0.15 ± 0.10 mm; 12 months: 0.16 ± 0.14 mm vs. 0.31 ± 0.18 mm; both P < 0.001). The 5.6 mm-BOZD VST group showed a smaller 3/4X value (indicating the distance from which the RCRP profile first reaches its three-quarter peak) and a higher summed RCRP value within the pupillary region compared to the 5.0 mm-BOZD CRT group (both P < 0.05). However, the maximum RCRP value, TZS, and TZD were similar between the two groups.
CONCLUSIONS: 5.6 mm-BOZD VST lenses provided superior myopia control efficacy compared to 5.0 mm-BOZD CRT lenses in 8-11-year-old children with low myopia, mainly through inducing a steeper RCRP profile and a greater RCRP sum value within the pupillary area.
METHODS: This retrospective study included136 eyes from children aged 8-11 years, having myopia of -0.50 to -3.00 D, which were fitted with two types of orthokeratology (OK) lenses: 5.0 mm-BOZD CRT and 5.6 mm-BOZD VST. The analysis detected AL at baseline, 6 months, and 12 months. The treatment zone size (TZS), treatment zone decentration (TZD) and RCRP parameters were obtained through analyzing the corneal topography maps obtained at baseline and after 1 year.
RESULTS: The AL increase in the 5.6 mm-BOZD VST group was significantly slower than the 5.0 mm-BOZD CRT group (6 months: 0.09 ± 0.08 mm vs. 0.15 ± 0.10 mm; 12 months: 0.16 ± 0.14 mm vs. 0.31 ± 0.18 mm; both P < 0.001). The 5.6 mm-BOZD VST group showed a smaller 3/4X value (indicating the distance from which the RCRP profile first reaches its three-quarter peak) and a higher summed RCRP value within the pupillary region compared to the 5.0 mm-BOZD CRT group (both P < 0.05). However, the maximum RCRP value, TZS, and TZD were similar between the two groups.
CONCLUSIONS: 5.6 mm-BOZD VST lenses provided superior myopia control efficacy compared to 5.0 mm-BOZD CRT lenses in 8-11-year-old children with low myopia, mainly through inducing a steeper RCRP profile and a greater RCRP sum value within the pupillary area.