摘要
AIM: To compare clinical results between toric and spherical periphery design orthokeratology(ortho-k) in myopic children with moderate-to-high corneal astigmatism. METHODS: This retrospective study enrolled 62 eyes of 62 subjects using toric ortho-k lenses. These subjects were assigned to the toric group. Based on the one-to-one match principle(same age, proximate spherical equivalence and corneal astigmatism), 62 eyes of 62 subjects were enrolled and included in the spherical group. At one-year followup visit, visual acuity, corneal astigmatism, treatment zone decentration, axial elongation and adverse reaction were compared between these two groups. RESULTS: At the one-year visit, corneal astigmatism was significantly lower in the toric group(1.22±0.76 D) than in the spherical group(2.05±0.85 D)(P=0.012). The mean magnitude of the treatment zone decentration was 0.62±0.42 mm in the toric group and 1.07±0.40 mm in the spherical group(P=0.004). Axial elongation was significantly slower in the toric group(0.04±0.13 mm) than in the spherical group(0.09±0.13 mm)(P=0.001). The oneyear axial elongation was significantly correlated with initial age(r=-0.487, P〈0.001) and periphery design of ortho-k lens(r=0.315, P〈0.001). The incidence of corneal staining was lower in the toric group(8.1%) than in the spherical group(19.4%)(P〈0.001). CONCLUSION: Toric periphery design ortho-k lenses may provide lower corneal astigmatism, better centration, slower axial elongation and lower incidence of corneal staining in myopic children with moderate-to-high corneal astigmatism.
AIM: To compare clinical results between toric and spherical periphery design orthokeratology(ortho-k) in myopic children with moderate-to-high corneal astigmatism. METHODS: This retrospective study enrolled 62 eyes of 62 subjects using toric ortho-k lenses. These subjects were assigned to the toric group. Based on the one-to-one match principle(same age, proximate spherical equivalence and corneal astigmatism), 62 eyes of 62 subjects were enrolled and included in the spherical group. At one-year followup visit, visual acuity, corneal astigmatism, treatment zone decentration, axial elongation and adverse reaction were compared between these two groups. RESULTS: At the one-year visit, corneal astigmatism was significantly lower in the toric group(1.22±0.76 D) than in the spherical group(2.05±0.85 D)(P=0.012). The mean magnitude of the treatment zone decentration was 0.62±0.42 mm in the toric group and 1.07±0.40 mm in the spherical group(P=0.004). Axial elongation was significantly slower in the toric group(0.04±0.13 mm) than in the spherical group(0.09±0.13 mm)(P=0.001). The oneyear axial elongation was significantly correlated with initial age(r=-0.487, P〈0.001) and periphery design of ortho-k lens(r=0.315, P〈0.001). The incidence of corneal staining was lower in the toric group(8.1%) than in the spherical group(19.4%)(P〈0.001). CONCLUSION: Toric periphery design ortho-k lenses may provide lower corneal astigmatism, better centration, slower axial elongation and lower incidence of corneal staining in myopic children with moderate-to-high corneal astigmatism.
基金
Supported by Capital’s Funds for Health Improvement and Research(No.2018-2-4092)