中国实用眼科杂志
中國實用眼科雜誌
중국실용안과잡지
CHINESE JOURNAL OF PRACTICAL OPHTHALMOLOGY
2013年
6期
719-723
,共5页
陈君虹%姜琚%戴玛莉%彭子苏%崔贺%张夏华%夏瑞静%吕帆
陳君虹%薑琚%戴瑪莉%彭子囌%崔賀%張夏華%夏瑞靜%呂帆
진군홍%강거%대마리%팽자소%최하%장하화%하서정%려범
角膜塑形镜%对比度视力%儿童
角膜塑形鏡%對比度視力%兒童
각막소형경%대비도시력%인동
Orthokeratology lens%Contrast visual acuity%Children
目的 研究夜戴型角膜塑形镜(Orthokeratology lens)对儿童对比度视力的影响及相关因素的分析.方法 人组儿童28例,男性15例,女性13例,年龄为(10.25±1.60)岁,平均等效球镜为(-3.18±1.07)D,矫正视力≥1.0.使用多功能视力测试仪MFVA-100在戴镜前、戴镜1周及1月后测量四个对比度视力(100％,25％,10％,5％),以LogMAR形式记录.结果 配戴角膜塑形镜前后,随着对比度的降低,LogMAR值均逐渐增大.在25％、10％、5％对比度下,戴镜1周(25％:t =-2.137,P=0.042; 10％:t=-3.157,P=0.004; 5％:t=-2.999,P=0.006,)及1月(25％:t =-2.322,P=0.028; 10％:t=-2.958,P=0.006; 5％:t=-2.989,P=0.006)后LogMAR视力值较戴镜前显著增大,差异有统计学意义.随着对比度的降低,戴镜前后LogMAR视力值差异越明显.配戴角膜塑形镜1月后LogMAR视力值与配戴角膜塑形镜1周后LogMAR视力值相比差异无统计学意义.对比度为5％时,戴镜1周(r=0.667,P＜0.0001)及戴镜1月(r=0.649,P＜0.0001)后LogMAR视力值改变量与初始近视度数存在显著相关性.结论 夜戴型角膜塑形镜提高了戴镜后的裸眼视力,同时也降低了儿童的对比度视力,以低对比度下视力的降低更明显.
目的 研究夜戴型角膜塑形鏡(Orthokeratology lens)對兒童對比度視力的影響及相關因素的分析.方法 人組兒童28例,男性15例,女性13例,年齡為(10.25±1.60)歲,平均等效毬鏡為(-3.18±1.07)D,矯正視力≥1.0.使用多功能視力測試儀MFVA-100在戴鏡前、戴鏡1週及1月後測量四箇對比度視力(100％,25％,10％,5％),以LogMAR形式記錄.結果 配戴角膜塑形鏡前後,隨著對比度的降低,LogMAR值均逐漸增大.在25％、10％、5％對比度下,戴鏡1週(25％:t =-2.137,P=0.042; 10％:t=-3.157,P=0.004; 5％:t=-2.999,P=0.006,)及1月(25％:t =-2.322,P=0.028; 10％:t=-2.958,P=0.006; 5％:t=-2.989,P=0.006)後LogMAR視力值較戴鏡前顯著增大,差異有統計學意義.隨著對比度的降低,戴鏡前後LogMAR視力值差異越明顯.配戴角膜塑形鏡1月後LogMAR視力值與配戴角膜塑形鏡1週後LogMAR視力值相比差異無統計學意義.對比度為5％時,戴鏡1週(r=0.667,P＜0.0001)及戴鏡1月(r=0.649,P＜0.0001)後LogMAR視力值改變量與初始近視度數存在顯著相關性.結論 夜戴型角膜塑形鏡提高瞭戴鏡後的裸眼視力,同時也降低瞭兒童的對比度視力,以低對比度下視力的降低更明顯.
목적 연구야대형각막소형경(Orthokeratology lens)대인동대비도시력적영향급상관인소적분석.방법 인조인동28례,남성15례,녀성13례,년령위(10.25±1.60)세,평균등효구경위(-3.18±1.07)D,교정시력≥1.0.사용다공능시력측시의MFVA-100재대경전、대경1주급1월후측량사개대비도시력(100％,25％,10％,5％),이LogMAR형식기록.결과 배대각막소형경전후,수착대비도적강저,LogMAR치균축점증대.재25％、10％、5％대비도하,대경1주(25％:t =-2.137,P=0.042; 10％:t=-3.157,P=0.004; 5％:t=-2.999,P=0.006,)급1월(25％:t =-2.322,P=0.028; 10％:t=-2.958,P=0.006; 5％:t=-2.989,P=0.006)후LogMAR시력치교대경전현저증대,차이유통계학의의.수착대비도적강저,대경전후LogMAR시력치차이월명현.배대각막소형경1월후LogMAR시력치여배대각막소형경1주후LogMAR시력치상비차이무통계학의의.대비도위5％시,대경1주(r=0.667,P＜0.0001)급대경1월(r=0.649,P＜0.0001)후LogMAR시력치개변량여초시근시도수존재현저상관성.결론 야대형각막소형경제고료대경후적라안시력,동시야강저료인동적대비도시력,이저대비도하시력적강저경명현.
Objective To evaluate the effect of overnight orthokeratology (ortho-k) lenses on the children's contrast visual acuity and analyze relevant factors.Methods A prospective study was conducted on 28 children (15 males and 13 females with mean age ±SD of 10.25±1.60 years) wearing overnight ortho-k lenses.Mean spherical equivalent ±SD was-3.1786±1.07337D and best-corrected visual acuity (VA) reached at least 20/20.Contrast visual acuity (100％,25％,10％,5％)was determined by MFVA-100 before,one week and one month after commencement of the procedure.Results Either before or after wearing orthokeratology lenses,LogMAR values of VA gradually increased with the decrease of contrast.At contrast levels of 25％,10％ and 5％,there was a statistically significant increase in the LogMAR value of VA after wearing orthokeratology lenses for one week (25％∶ P =0.042,t =-2.137; 10％∶ P =0.004,t =-3.157; 5％∶ P =0.006,t =-2.99) and one month (25％∶ P =0.028,t =-2.322; 10％∶ P =0.006,t =-2.958; 5％∶ P =0.006,t =-2.989).The difference was more obvious in lower contrast levels.There was no statistical difference between the LogMAR value of VA after wearing orthokeratology lenses for one week and one month.At contrast level of 5％,the changes of LogMAR value of VA induced by orthokeratology were significantly correlated with the amount of initial myopic diopter.Conclusions The ovemight ortho-k lenses improve naked visual acuity of children as well as reduce their contrast visual acuity,specifically at the low contrast levels.
