Author/Authors :
Asharlous, Amir Optometry Department - Mashhad University of Medical Sciences , Jafarzadehpur, Ebrahim Noor Research Center for Ophthalmic Epidemiology - Noor Eye Hospital, Tehran , Mirzajani, Ali Optometry Department - Iran University of Medical Sciences, Tehran , Khabazkhoob, Mehdi Department of Medical Surgical Nursing - School of Nursing and Midwifery - Shahid Beheshti University of Medical Sciences, Tehran , Heydarian, Samira Department of Optometry - School of Paramedical Science - Mashhad University of Medical Science , Taghipour, Ali Department of Epidemiology & Research Methodology - Faculty of Health - Mashhad University of Medical Sciences
Abstract :
Purpose: To evaluate tear film stability and optical aberrations in eyes wearing plano Lotrafilcon B contact lenses (CL).
Methods: Tear Deformation Time (TDT) and aberrometric parameters were assessed in 86 normal emmetropic eyes before and 6 h after wearing
CL.
Result: A statistically significant decrease in TDT and increase in root mean square (RMS) values of higher order aberrations (HOA) were
revealed 6 h after CL insertion (both P < 0.001). The low order aberrations (LOA) RMS values measured with CL were higher than those in
naked eyes, but the difference was not statistically significant. None of individual Zernike polynomials showed any significant alteration.
Conclusion: Our findings indicated that the Lotrafilcon B contact lens affects HOA more than LOA. The tear film was less stable after wearing CL.
Keywords :
Tear stability , Tear Deformation Time , Aberrations , Optical quality , Silicone hydrogel contact lens
