Ocuscan rxp

The study was conducted on 75 participants between January 1, 2013, and April 30, 2013. A pretested structured questionnaire was used to obtain demographic data and the clinical history or each patient. The ophthalmological examination, conducted by the primary investigator (C.O.), included a best corrected visual acuity evaluation, slit lamp, and IOP measurement using both the Tono-Pen AVIA (Reichert Technologies) and GAT. The Tono-Pen was calibrated weekly and the GAT was calibrated monthly by our biomedical technician. The GAT was used first and then, after 10 min (to allow recovery of the cornea), the Tono-Pen measurement was performed. All the measurements were made by the same examiner (C.O.) and in all patients the IOP measurements were made during the same period of the day (i.e. between 09.00 and 12.00 h). Two readings were taken with each instrument and the average of each was recorded. After the measurements the subject was asked which of the instruments they found more acceptable. The CCT was measured with an ultrasonic pachymeter (OcuScan RxP; Alcon Laboratories, Fort Worth, Tex., USA). Visual field defects were assessed using a visual field perimeter (Humphrey Matrix FDT; Carl Zeiss Meditec AG, Jena, Germany). Gonioscopy and slit lamp biomicroscopy of the fundus after papillary dilatation were performed subsequently.

The single corneal surgeon retrieved electronic medical records of all the patients who underwent the procedure at our tertiary eye hospital between 2008 and 2020 for retrospective analysis. The demographic data of the patients are shown in Table 1. The study was approved by the institutional review board (and was presented as a paper in the corneal surgery session 1 at the European Society of Cataract and Refractive Surgeons (ESCRS) 2022 held in Milan), with due informed consent. All the patients underwent comprehensive ophthalmic examination preoperatively, which included slit-lamp biomicroscopy, Goldmann applanation tonometry (Tonopen or finger tension when needed), and indirect ophthalmoscopy (ultrasound B-scan for dense media haze), while ultrasound biomicroscopy was done to assess the lens or IOL positions, the status of capsular remnants, and the angle structures when needed. The axial length was measured using an A-scan ultrasound device (Alcon Ocuscan RXP) in most cases or IOL Master 700 when possible, keratometry was measured manually in most cases or a standard K of 44.0 D was used when not measurable, and for IOL power calculation, the Sanders-Retzlaff -Kraff Theoretical (SRK-T) formula was used in most cases and Barrette Universal II was used in some cases. The indications for surgery were as shown in Table 2.