Corneal Biomechanical Findings in Contact Lens Induced Corneal Warpage.
Purpose. To evaluate the difference in biomechanical properties between contact lens induced corneal warpage and normal and keratoconic eyes. Method. Prospective observational case control study, where 94 eyes of 47 warpage suspicious and 46 eyes of 23 keratoconic patients were included. Warpage suspected cases were followed until a definite diagnosis was made (warpage, normal, or keratoconus). Results. 44 eyes of 22 patients had contact lens related corneal warpage. 46 eyes of 23 people were diagnosed as nonwarpage normal eyes. 46 eyes of 23 known keratoconus patients were included for comparison. The mean age of the participants was 23.8 ± 3.8 years, and 66.2% of the subjects were female. The demographic and refractive data were not different between warpage and normal groups but were different in the keratoconus group. The biomechanical properties (corneal hysteresis or CH and corneal resistance factor or CRF) were different with the highest value in the warpage group followed by normal and keratoconus groups. CRF was 10.08 ± 1.75, 9.23 ± 1.22, and 7.38 ± 2.14 and CH was 10.21 ± 1.57, 9.59 ± 1.21, and 8.69 ± 2.34 in the warpage, normal, and keratoconus groups, respectively. Conclusion. Corneal biomechanics may be different in people who develop contact lens induced warpage.
Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Fateme
0000-0003-2851-2692
F
Alipour
Tehran University of Medical Sciences, Tehran, Iran.
Mojgan
M
Letafatnejad
Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Amir Hooshang
AH
Beheshtnejad
Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Seyed-Farzad
0000-0002-9209-3034
SF
Mohammadi
Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Seyed Reza
SR
Ghaffary
Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Narges
N
Hassanpoor
Eye Research Center and Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Mehdi
M
Yaseri
CLAO J. 2002 Oct;28(4):169-71
12394539
Cornea. 2007 Oct;26(9):1153-5
17893558
J Cataract Refract Surg. 2005 Jan;31(1):156-62
15721708
CLAO J. 1999 Apr;25(2):114-22
10344298
Ophthalmic Physiol Opt. 2009 Jul;29(4):464-71
19523091
Cornea. 2010 Nov;29(11):1247-51
20697286
Cont Lens Anterior Eye. 2008 Jun;31(3):122-5
18343184
J Refract Surg. 2011 Jun;27(6):458-64
21243973
Optom Vis Sci. 2007 May;84(5):401-9
17502823
Cont Lens Anterior Eye. 2003 Sep;26(3):153-9
16303511
Cont Lens Anterior Eye. 2009 Apr;32(2):88-92
19181564
Ophthalmology. 1990 Jun;97(6):734-44
2374677
Invest Ophthalmol Vis Sci. 2006 Dec;47(12):5337-47
17122122
J Refract Surg. 2009 Oct;25(10 Suppl):S958-62
19848378
J Res Med Sci. 2012 Jan;17(1):32-9
23248654
Br J Ophthalmol. 1996 Dec;80(12 ):1068-72
9059272
Ophthalmology. 2002 Dec;109(12):2336-41
12466180
Curr Eye Res. 2012 Jul;37(7):553-62
22559332