Paper Information

Journal:   JOURNAL OF OPHTHALMIC AND VISION RESEARCH   2016 , Volume 11 , Number 2; Page(s) 131 To 135.
 
Paper: 

CORNEAL BIOMECHANICAL CHANGES FOLLOWING TORIC SOFT CONTACT LENS WEAR

 
DOI: 

10.4103/2008-322X.183921

 
Author(s):  RADAIE MOGHADAM SOMAYEH, HASHEMI HASSAN, JAFARZADEHPUR EBRAHIM*, YEKTA ABBAS ALI, KHABAZKHOOB MEHDI
 
* NOOR RESEARCH CENTER FOR OPHTHALMIC EPIDEMIOLOGY, NOOR EYE HOSPITAL, NO. 96, ESFANDIAR BLVD., VALIASR STREET, TEHRAN 19686, IRAN
 
Abstract: 

Purpose: To determine the effect of using toric soft contact lenses on corneal biomechanical properties.
Methods: We enrolled 33 healthy patients with mean age of 23.18 ± 4.06 and minimal cylinder power of 1 D (?.98 ± 0.808 SD) and negative history of contact lens use, keratoconic patients were excluded from the study. Toric soft contact lenses (BIOFINITY, Comfilcon A, Coopervision, Southampton, UK) were fitted in all participants. The Ocular Response Analyzer (Reichert Ophthalmic Instruments, Depew, New York, USA) was used to measure corneal hysteresis (CH), corneal resistance factor (CRF), and the Pentacam HR (Oculus, Inc., Lynnwood, WA, USA) was used to measure central corneal thickness (CCT) and mean keratometry (K mean) before and one week, one month, and three months after using the toric soft contact lenses.
Results: CH and CRF were decreased significantly one month after using the contact lens, mean CH decreased from 9.99 ± 1.44 to 9.59 ± 1.54 mmHg, and mean CRF decreased from 9.96 ± 1.71 to 9.63 ± 1.73 mmHg (P=0.013 and P=0.017, respectively). Mean CCT and K mean did not show a significant change during the period of toric soft contact lens use.
Conclusion: CH and CRF decreased significantly one month after fitting toric soft contact lenses while CCT and Kmean did not change significantly. Corneal biomechanical parameters may alter with toric soft contact lens use and such changes may have implications with long?term use such lenses.

 
Keyword(s): CORNEAL HYSTERESIS, CORNEAL RESISTANCE FACTOR, TORIC SOFT CONTACT LENS
 
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