It was vice versa for the posterior segment (180 vs. The mean acquisition time for anterior segment imaging was faster in the smartphone group compared to the control group (156 vs. However, the image quality of the posterior segment was significantly, positively correlated (Spearman’s Rho) with work experience. Image quality increased as well but did not improve significantly from take 1 to take 3. The subjectively perceived difficulty decreased significantly over the course of three attempts (Kendall’s W). The overall smartphone quality was 7.2/10 for the anterior and 6.4/10 for the posterior segment. Results: Each participant had three attempts at the same task. A questionnaire on usability and experience in smartphone and slit lamp use was taken by all of the participants. Images with a score ≥ 7.0/10 were considered as good as the reference images. The image quality was graded independently by two blinded ophthalmologists on a scale from 0 (low) to 10 (high quality). The participant group used an Apple iPhone 11 mounted on a slit lamp via a removable SlitREC smartphone adapter (Custom Surgical GmbH, Munich, Germany). The control group used professional photography equipment. Both groups took images of the anterior and the posterior eye segment of the same proband. The control group consisted of one ophthalmic photographer. The smartphone group consisted of 26 medical staff (consultants, residents, and students). Methods: A single-center, prospective, clinical study conducted in the Department of Ophthalmology at the University Hospital Zurich, Switzerland. If you have any comments or questions please use the comments form below.Purpose: To assess the usability and image quality of a smartphone adapter for direct slit lamp imaging. Play with the other tools to become familiar with the StatPlus application on your Mac.Ĭheck back in the next couple of weeks because we will be covering some of the analytical tools in detail. In a couple of seconds you will see a separate spreadsheet with the details of the analysis, that’s it. Select the cell range you wish to use and click OK. Using the spreadsheet you opened in the previous section click Statistics > Basic Statistics then Descriptive Statistics.Ģ. To make sure everything is working as it should let’s give StatPlus a try.ġ. Then open the StatPlus application and click Spreadsheet > Microsoft Excel. To begin using StatPlus with Excel 2011, open the spreadsheet you wish to run the analysis on. When you run the DMG file drag the application icon to the Applications folder.ģ. Open the Zip file and extract the DMG file.Ģ. Head on over to to download a free copy of StatsPlus:Mac LE. Software/Hardware used: Excel 2011 and StatPlus:Mac LE running on Mac OS X. Check out the guide below to get you started with StatPlus for Excel 2011 on your Mac. That’s because Excel 2011 doesn’t ship with StatPlus, it requires a separate download and install from the makers of StatPlus. However if you’re coming from a Windows environment you will find that there is no add-in dialog that allows you to install the StatPlus normally found in Excel for Windows. If you’re looking for strong analytics tool that can easily calculate regressions, ANOVA, and other tools used by statisticians, then Excel with the StatPlus add-in is the solution for you. A lot of Mac users knock Excel for not being as pretty as Numbers on the Mac, but at the end of the day the hardcore Excel users care about one thing and that is functionality.
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