Effects of accelerated and conventional corneal cross-linking (CXL) on corneal density

This dataset consists of a single SPSS .sav file containing corneal density data for patients with progressive Keratoconus KCN treated by collagen cross-linking (CXL). Patients are divided into two groups of 23 based on treatment type: accelerated and conventional corneal cross-linking (CXL).<br>Variables provided:<br>Patient <b>treatment group</b>, <b>gender </b>and <b>age</b>.<b>Eye: OS</b> (oculus sinister) - left eye, <b>OD</b> (oculus dextrus) - right eye<br>The following variables give corneal density in gray scale units (GSU). Where each has the prefix 'p' in the spreadsheet, this indicates a post-treatment measurement:<br><br><b>ANT:</b> anterior layer<b>CL:</b> middle layer<br><b>POST:</b> posterior layer<b>S0_2MM: </b>0-2 mm zone<b>S2_6MM:</b> 2-6 mm zone<b>S6_10MM:</b> 6-10 mm zone<b>S10_12MM: </b> 10-12 mm zone<b>TOT:</b> Total<br><b>Background of study methods:</b><br>Pentacam densitometry and corneal mapping were performed before and six months following the randomly assigned intervention. Corneal density was measured over different zones and layers of the cornea by two independent ophthalmologists. Total corneal density was calculated. The patients were followed up for the occurrence of procedure related and unrelated complication one week, one month and a final visit around 6 months (180 ± 10 days) after the procedure, during which the corneal density was remeasured and recorded.<br>