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Zhong Nan Da Xue Xue Bao Yi Xue Ban 2021 Feb;46(2):162-168

Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha 410008.

Objectives: To investigate angle Kappa and diopter distribution in myopic patients and the changes of angle Kappa and corneal morphology after Sub-Bowman-Keratomileusis (SBK), and to analyze the effects of the surgery on corneal morphologic changes and the patients' near fixation characteristics.

Methods: The clinical data of 134 myopic patients (268 eyes) undergoing SBK from August 2015 to August 2016 were retrospectively analyzed. Angle Kappa, corneal curvature in the central corneal region of 3 mm, and post-corneal Diff value were measured by Orbscan IIz Corneal Topography System before operation, 1 month and 6 months after operation. Read More

Int Ophthalmol 2020 Nov 3;40(11):2913-2921. Epub 2020 Jul 3.

Eye Centre, Hong Kong Baptist Hospital, 222 Waterloo Road, Kowloon Tong, Hong Kong, People's Republic of China.

Objectives: To compare central corneal thickness (CCT) measurements by scanning slit topography (SST), infrared pachymetry (IRP), and ultrasound pachymetry (USP), and their agreement in normal and post-laser in situ keratomileusis (LASIK) eyes.

Methods: Sixty normal and 35 post-LASIK subjects were recruited. Only one eye from each subject was analyzed. Read More

J Curr Ophthalmol 2018 Sep 16;30(3):217-222. Epub 2017 Dec 16.

School of Pharmacy, International Campus, Tehran University of Medical Sciences, Tehran, Iran.

Purpose: This study evaluates the correlation between horizontal white-to-white (WTW) distance using Caliper and Orbscan IIz with the ciliary sulcus diameter measured by high frequency ultrasound biomicroscopy (UBM) and presents an adjustment formula to improve the correlation.

Methods: We measured horizontal sulcus-to-sulcus (STS) dimension of 273 right eyes of 273 high myopic patients with 35 MHz UBM and horizontal WTW using Orbscan IIz and Caliper. Mean WTW diameter, differences, and the correlation of measurement methods were evaluated. Read More

Sci Rep 2018 08 17;8(1):12345. Epub 2018 Aug 17.

Department of Corneal and External Eye Diseases, St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool, United Kingdom.

To investigate a method for precision analysis to discriminate true corneal change from measurement imprecision in keratoconus (KC). Thirty patients with KC and 30 healthy controls were included. Coefficients of repeatability and limits of agreement (LOA) were compared using multiple measurements for inter-observer and inter-device agreement with the Pentacam HR, Orbscan IIz, and Tomey Casia SS-1000. Read More

J Cataract Refract Surg 2018 Aug;44(8):979-992

From Singapore National Eye Center (Chan, Chua) and Eye Surgeons @ Novena (Chan), Singapore, Singapore; the Rothschild Foundation (Saad, Gatinel), Clinique Lamartine (Ancel), and the Centre D'Ophtalmologie (Saragoussi), Paris, France; the American University of Beirut (Saad), Beirut, Lebanon; Roski Eye Institute (Randleman), University of Southern California, Los Angeles, California, and Pepose Vision Institute (Qazi), Chesterfield, Missouri, USA; the Departement d'Ophtalmologie (Harissi-Dagher), Université de Montréal, Montreal, Quebec, Canada; Narayana Nethralaya Hospital (Shetty), Bangalore, India; Asian Eye Institute (Ang), Manila, Philippines; London Vision Clinic (Reinstein), London, United Kingdom. Electronic address:

Purpose: To identify risk factors for ectasia after laser in situ keratomileusis (LASIK) by comparing the accuracy of the Ectasia Risk Score System (ERSS), Screening Corneal Objective Risk of Ectasia (SCORE) Analyzer, and percentage of tissue altered (PTA) in predicting the occurrence of ectasia.

Setting: Multiple centers in 8 countries.

Design: Retrospective case series. Read More