논문 상세보기
pp.405-415
목적: 근시진행을 지연시키기 위해 누진가입도렌즈를 착용하는 어린이의 독서시 하방편위량이 근시진행에 미치는 영향을 알아보고자 한다. 방법: 근시성 어린이 80명(8~12세, 구면굴절이상도 -0.50D~-5.00D)을 대상으로 누진가입도렌즈(42명)와 단초점렌즈(38명)를 무작위로 착용시켰다. 안경착용 1주 후, 2주 후 및 4주 후 카메라를 이용하여 근거리작업시 하방편위량을 측정하였다. 6개월 후 굴절이상도와 안축장의 변화와 독서시 하방편위량의 상관성을 분석하였다. 결과: 누진가입도렌즈 착용군의 근거리작업 시 하방편위량은 평균 7.14±1.19 mm였으며, 하방편위량이 클수록 6개월 동안 굴절이상도의 변화량이 적고(r=0.52, p=0.00), 안축장의 변화량도 적은 것으로 나타났다(r=-0.47, p=0.00). 6개월 간 근시진행도는 누진가입도렌즈 착용군에서 -0.25±0.22D, 단초점렌즈 착용군에서-0.37±0.23D로 유의한 차이가 있었고(p=0.02), 안축장의 변화는 누진가입도렌즈 착용군에서 0.13±0.10 mm, 단초점렌즈 착용군에서 0.19±0.14 mm로 유의한 차이가 있었다(p=0.03). 결론: 어린이에게 6개월 동안 누진가입도렌즈를 착용시켰을 때 단초점렌즈와 비교하여 근시진행이 지연 되었고, 독서시 하방편위량이 클수록 효과가 큰 것으로 나타났다. 누진가입도렌즈의 착용 효과를 높이기 위해서는 독서시 충분한 하방주시가 이루어지도록 교육하는 것이 중요하다고 생각된다.
Purpose: To clarify the effect of downward deviation at reading to myopic progression who myopic children wear progressive addition lenses for the purpose of retardation of myopia progression. Methods: Eighty subjects (aged 8 to 12 yrs, spherical refractive error -0.50~-5.00D) including progressive lens group (42 subjects) and single vision lens group (38 subjects) were randomly arranged. We measured downward deviation at reading by using digital camera after 1 week, 2 weeks and 4 weeks. We analyzed correlation between downward deviation at reading and changes of refractive error and axial length after 6 months. Results: Mean downward deviation of progressive lens group at near work was 7.14±1.19 mm. As the downward deviation was increased, the change of refractive error(r=0.52, p=0.00) and axial length(r=-0.47, p=0.00) were decreased. Myopic progression for six months in progressive lens and single vision lens groups were -0.25±0.22D and -0.37±0.23D, respectively. The difference between two groups was significant(p=0.02). The change of axial length between PAL group(0.13±0.10 mm) and SV group(-0.19±0.14 mm) also showed significant difference(p=0.03). Conclusion: By wearing progressive addition lenses to children for six months, myopic progression was slower than single vision lens group. As the downward deviation at reading was increased, the effect of retarding myopic progression was increased. To maximize the effect of retarding myopic progression, there is considered that the practice to posture for sufficient downward deviation at reading is necessary to children wear progressive addition lenses.
