[av_one_full first min_height= » vertical_alignment= » space= » custom_margin= » margin=’0px’ padding=’0px’ border= » border_color= » radius=’0px’ background_color= » src= » background_position=’top left’ background_repeat=’no-repeat’ animation= » mobile_breaking= » mobile_display= » av_uid= »][/av_one_full] [av_one_fourth first min_height=’av-equal-height-column’ vertical_alignment=’av-align-top’ space=’no_margin’ margin=’0px’ margin_sync=’true’ padding=’30px’ padding_sync=’true’ border= » border_color= » radius=’0px’ radius_sync=’true’ background_color=’#ffffff’ src= » attachment= » attachment_size= » background_position=’top left’ background_repeat=’no-repeat’ animation= » mobile_breaking= » mobile_display= » av_uid= »] [av_hr class=’custom’ icon_select=’no’ icon=’ue808′ font=’entypo-fontello’ position=’center’ shadow=’no-shadow’ height=’50’ custom_border=’av-border-none’ custom_width= » custom_margin_top=’0px’ custom_margin_bottom=’30px’ custom_border_color= » custom_icon_color= » id= » custom_class= » template_class= » av_uid= » sc_version=’1.0′ admin_preview_bg= »] [av_image src=’https://www.cogl.ch/wp-content/uploads/2021/07/Capture-décran-2021-07-04-à-10.55.15-226×300.png’ attachment=’33332′ attachment_size=’medium’ copyright= » caption= » styling= » align=’center’ font_size= » overlay_opacity=’0.4′ overlay_color=’#000000′ overlay_text_color=’#ffffff’ animation=’no-animation’ hover= » appearance= » link=’lightbox’ target= » title_attr= » alt_attr= » lazy_loading=’disabled’ id= » custom_class= » template_class= » av_element_hidden_in_editor=’0′ av_uid=’av-kslftwok’ sc_version=’1.0′ admin_preview_bg= »][/av_image] [av_textblock size= » av-medium-font-size= » av-small-font-size= » av-mini-font-size= » font_color=’custom’ color=’#a5a5a5′ id= » custom_class= » template_class= » av_uid=’av-kslfyazx’ sc_version=’1.0′ admin_preview_bg= »] American Journal of Ophtalmology 10/07/15 Authors :
- F. Majo
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Correcting Interdevice Bias of Horizontal White-to-White and Sulcus-to-Sulcus Measures Used for Implantable Collamer Lens Sizing
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ABSTRACT
To assess the agreement and repeatability of horizontal white-to-white (WTW) and horizontal sulcus-to-sulcus (STS) diameter measurements and use these data in combination with available literature to correct for interdevice bias in preoperative implantable collamer lens (ICL) size selection. Design Interinstrument reliability and bias assessment study. Methods A total of 107 eyes from 56 patients assessed for ICL implantation at our institution were included in the study. This was a consecutive series of all patients with suitable available data. The agreement and bias between WTW (measured with the Pentacam and BioGraph devices) and STS (measured with the HiScan device) were estimated. Results The mean spherical equivalent was −8.93 ± 5.69 diopters. The BioGraph measures of WTW were wider than those taken with the Pentacam (bias = 0.26 mm, P < .01), and both horizontal WTW measures were wider than the horizontal STS measures (bias >0.91 mm, P < .01). The repeatability (Sr) of STS measured with the HiScan was 0.39 mm, which was significantly reduced (Sr = 0.15 mm) when the average of 2 measures was used. Agreement between the horizontal WTW measures and horizontal STS estimates when bias was accounted for was г = 0.54 with the Pentacam and г = 0.64 with the BioGraph. Conclusions Large interdevice bias was observed for WTW and STS measures. STS measures demonstrated poor repeatability, but the average of repeated measures significantly improved repeatability. In order to conform to the US Food and Drug Administration’s accepted guidelines for ICL sizing, clinicians should be aware of and account for the inconsistencies between devices.
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