Author/Authors :
Hassani, Mohammadali Noor Research Center for Ophthalmic Epidemiology - Noor Eye Hospital, Tehran , Jafarzadehpur, Ebrahim Department of Optometry - Iran University of Medical Sciences, Tehran, Iran , Mirzajani, Ali Department of Optometry - Iran University of Medical Sciences, Tehran, Iran , Yekta, AbbasAli Refractive Errors Research Center - School of Paramedical Sciences - Mashhad University of Medical Sciences, Mashhad, Iran , Khabazkhoob, Mehdi Department of Medical Surgical Nursing - School of Nursing and Midwifery - Shahid Beheshti University of Medical Sciences, Tehran, Iran
Abstract :
Purpose: To compare the visual acuity outcome of the ClearKone SynergEyes™ hybrid contact lens and Boston XO rigid gas permeable (RGP)
contact lens in patients with keratoconus.
Methods: Twenty-eight eyes with keratoconus participated in this study. The visual acuity was examined once with the RGP lens and once with
the ClearKone SynergEyes™ hybrid contact lens.
Results: The mean corneal keratometry, the mean lens back optic zone radius, and the mean vault was 7.23 ± 0.62 mm, 7.67 ± 0.44 mm, and
277.94 ± 104.5 mm, respectively. Visual acuity was significantly better with the ClearKone SynergEyes™ hybrid lens (P ¼ 0.004). The mean
best corrected visual acuity (logMAR) was 0.022 ± 0.03 and 0.057 ± 0.09 for the ClearKone and RGP lens, respectively. The Clearkone lens
yields an average improvement of one line of the Snellen chart in comparison with the RGP lens.
Conclusion: The ClearKone hybrid contact lens and the RGP lens may improve visual acuity in corneal irregularities. But patients who are able
to afford hybrid lens wearing may show better visual acuity.
Keywords :
ClearKone hybrid contact lens , Rigid gas permeable , Keratoconus , Irregular cornea
