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eye rubbing-induced changes in intraocular pressure and corneal thickness measured at five locations, in subjects with ocular allergy

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International Journal of Ophthalmology(English edition) 2015年第1期8卷 81-88页

作者： Uchechukwu L.Osuagwu Saud A.Alanazi Visual and Ophthalmic Optics Group (Chronic Disease&Ageing Domain) Institute of Health&Biomedical InnovationSchool of Optometry&Vision SciencesQueensland University of Technology Department of Optometry & Vision Sciences College of Applied Medical Sciences King Saud University

AIM: To assess the effects of eye rubbing on corneal thickness(CT) and intraocular pressure(IOP)measurements obtained 0-30 min after habitual eye rubbing in symptomatic ***: Measurements of IOP and CT were obtained at five locations(central, temporal, superior,nasal and inferior) before, and every 5min for 30 min interval after 30 s of eye rubbing, for 25 randomly selected eyes of 14 subjects with ocular allergy and 11age-matched normals. Differences in measurements were calculated in each group [Baseline measurements minus measurements recorded at each time interval after eye rubbing(for IOP), and for each corneal location(for CT)]and comparison were then made between groups(allergic versus control) for differences in any observed ***: Within groups, baseline mean IOPs in the allergic patient-group(14.2 ±3.0 mm Hg) and in the control group(13.1±1.9 mm Hg) were similar at all times,after eye rubbing(P >0.05, for all). The maximum reduction in IOP was 0.8 mm Hg in the control subjects and the maximum increase was also 0.8 mm Hg in the allergic subjects. Between groups(allergic versus control), the changes in IOP remained under 1 mm Hg at all times(P =0.2) after 30 min of eye rubbing. Between 0and 30 min of CT measurements after eye rubbing, the mean central CT(CCT), inferior CT(ICT), superior CT(SCT), temporal CT(TCT) and nasal CT(NCT) did not vary significantly from baseline values in the control and allergic-subject groups(P >0.05, for both). Between both groups, changes in CT were similar at all locations(P >0.05)except for the TC which was minimally thinner by about4.4 μm(P =0.001) in the allergic subjects than in the control subjects, 30 min following 30 s of eye ***: IOP measured in allergic subjects after30 s of habitual eye rubbing was comparable with that obtained in normal subjects at all times between 0 and30 min. Although, CT in the allergic subjects were similar to those of the control subjects at all time

关键词： allergy corneal thickness intraocular pressure eye rubbing tonometry pachymetry

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

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eye and Vision 2017年第1期4卷 106-113页

作者： Jordan V.Chervenkoff Elizabeth Hawkes Gabriela Ortiz Deborah Horney Mayank A.Nanavaty Sussex eye Hospital Brighton&Sussex University Hospitals NHS TrustEastern RoadBrighton BN25BFUK

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 *** rubbing was performed for 2 *** outcomes studied were anterior and posterior K *** outcomes were changes in TFBUT,axial length(AL)&ACD,K changes in various zones,asphericity and *** and post rubbing K,aberrometry,ACD and TFBUT were assessed in a predetermined *** relationship of the above parameters to axial length(AL)was also *** was analysed using vector ***: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)*** was significant change in Z^(+2)_(2) polynomial following *** 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 *** eyes had more changes in posterior K and ***,eyes with deeper ACD showed more steepness of posterior K.

关键词： eye rubbing Ectasia Tear film break up time Astigmatism Aberrations

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