Changes Of Corneal Tomographic Variables Between Different Cessation Periods For Rigid Gas-Permeable Contact Lenses In Keratoconus Patients
Published 2023 - 41st Congress of the ESCRS
Reference: PO0721 | DOI: 10.82333/3esk-2369
Authors: Ying-Chen Huang* 1 , Ken-Kuo Lin 1 , Yun-Wen Chen 2 , Ning Hung 3 , Jiahn-Shing Lee 1 , Chiun-Ho Hou 4 , Ching-Hsi Hsiao 5
1Ophthalmology,Chang Gung Memorial Hospital,Linkou,Taiwan, Province of China, 2Ophthalmology,Chang Gung Memorial Hospital,Kaohsiung,Taiwan, Province of China, 3Sunming Eye Clinic Wenshan Branch,Taipei,Taiwan, Province of China, 4Ophthalmology,National Taiwan University Hospital,Taipei,Taiwan, Province of China, 5Ophthalmology,Chang Gung Memorial Hospital,Linkou ,Taiwan, Province of China
To evaluate the changes of corneal tomographic variables between different cessation periods for rigid gas-permeable (RGP) contact lenses in keratoconus (KC) patients.
This retrospective and longitudinal study was conducted in Chang-Gung Memorial Hospital, Taipei.
Patients with diagnosis of KC wearing RGP contact lens, either aspherical contact lens or Rose K lens, were included. Pentacam corneal tomographic variables including K1 F, K2 F, Km F, Rv F, Pachy Min, and Sagittal Power (SagK1 F , SagK2 F, 1mm - 7mm) were performed at baseline (before RGP fitting) and 1 week, 1 month and 3 months (separately and RGP taken off for 30 minutes before examinations at each timepoints) after wearing RGP. Then patients withheld RGP for 1 week, 2 weeks and 1 month after 3-month wearing. Pentacam corneal tomography were performed accordingly.
42 eyes of 23 patients were included. 18 eyes wore aspherical RGP contact lens and 24 eyes wore Rose K lens. In either aspherical RGP or Rose K group, compared with their baseline at different timepoints, all corneal tomographic variables showed no significant difference at timepoints of withholding RGP for 1 week, 2 weeks and 1 month after 3-month wearing. However, few readings in corneal tomographic variables were significantly different at timepoint of 1 week, 1 month and 3 months (RGP taken off for 30 minutes before examinations at each timepoints).
RGP contact lenses were non-surgical management for patients with KC. There are no significant changes in corneal tomographic variables at timepoints of withholding RGP for 1 week, 2 weeks and 1 month after 3-month wearing in this study suggests that corneal tomographic variables of KC patients return to their original status after removal of RGPs for 1 week. This is beneficial to both patients and healthcare providers for RGP adjustment and evaluation of KC progression.