A randomized,fellow eye,comparison of keratometry,aberrometry,tear film,axial length and the anterior chamber depth after eye rubbing in non-keratoconic eyes  

作　　者：Jordan V.Chervenkoff Elizabeth Hawkes Gabriela Ortiz Deborah Horney Mayank A.Nanavaty 

机构地区：[1]Sussex Eye Hospital,Brighton&Sussex University Hospitals NHS Trust,Eastern Road,Brighton BN25BF,UK

出　　处：《Eye and Vision》2017年第1期106-113,共8页眼视光学杂志（英文）

摘　　要：Background:To investigate the effect of eye rubbing on keratometry(K),aberrometry,tear film break-up-time(TFBUT)and anterior chamber depth(ACD).Methods:Volunteers without any corneal pathology or dry eyes were randomised to rubbing in one eye and the fellow-eye was control.Eye rubbing was performed for 2 min.Primary outcomes studied were anterior and posterior K changes.Secondary outcomes were changes in TFBUT,axial length(AL)&ACD,K changes in various zones,asphericity and aberrometry.Pre and post rubbing K,aberrometry,ACD and TFBUT were assessed in a predetermined sequence.The relationship of the above parameters to axial length(AL)was also assessed.Astigmatism was analysed using vector analysis.Results:Pre versus post rubbing,anterior flatter K further flattened(42.51±1.52 D vs.42.36±1.53 D,p=0.003)and the changes to J0 vector in central cornea(−0.16±0.26 D vs.-0.27±0.33 D,p=0.038)suggested change to against-the-rule(ATR)astigmatism.There was significant change in Z^(+2)_(2) polynomial following rubbing.We found a positive correlation between axial length and change in posterior K(r=0.335,p=0.020).The TFBUT reduced following eye rubbing(15.3 s vs.13.9 s,p=0.0001).There was a positive correlation between AL and increase in ACD post rubbing(r=0.300,p=0.038).There was a positive correlation between ACD and change in mean posterior K(r=0.305,p=0.035).Conclusions:In healthy eyes,following eye rubbing,there is a significant change in TFBUT and central anterior K changes towards ATR astigmatism.Longer eyes had more changes in posterior K and ACD.Whereas,eyes with deeper ACD showed more steepness of posterior K.

关 键 词：Eye rubbing ECTASIA Tear film break up time ASTIGMATISM ABERRATIONS 

分 类 号：TN8[电子电信—信息与通信工程]