Journal List > J Korean Ophthalmol Soc > v.53(5) > 1009353

TOOLS
Lee and Yu: Intraocular Pressure Measurement with the Noncontact Tonometer and Rebound Tonometer through Plano Soft Contact Lenses
Original Article
Journal of the Korean Ophthalmological Society

Journal of the Korean Ophthalmological Society 2012; 53(5): 662-667.

Published online: 16 May 2012

DOI: https://doi.org/10.3341/jkos.2012.53.5.662

Intraocular Pressure Measurement with the Noncontact Tonometer and Rebound Tonometer through Plano Soft Contact Lenses

Chang Mok Lee, MD, Young Cheol Yu, MD

Department of Ophthalmology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.

Address reprint requests to Young Cheol Yu, MD. Department of Ophthalmology, Hallym University Kangdong Sacred Heart Hospital, #150 Seongnae-gil, Gangdong-gu, Seoul 134-701, Korea. Tel: 82-2-2224-2274, Fax: 82-2-470-2088, demian7435@gmail.com

Received 4 July 2011       Accepted 24 March 2012

Copyright © 2012 The Korean Ophthalmological Society

Abstract

Purpose

To investigate the accuracy of intraocular pressure (IOP) measurement through a plano soft contact lens (SCL) in situ by a noncontact tonometer (NCT) and a rebound tonometer (RBT).

Methods

The IOP of 66 eyes of 33 subjects with no ocular pathology was measured by NCT (tonometer CT-80, TOPCON, Japan) and RBT (iCare rebound tonometry™, Tiolat Oy, Finland). IOP measurement was repeated through plano SCL (ACUVUE OASYS®, Johnson & Johnson Vision Care Inc., USA) in situ. Statistical analysis was performed using the paired t-test.

Results

Mean IOP measured by NCT was 13.10 ± 2.52 mmHg without SCL and 12.95 ± 2.56 mmHg with SCL. Mean IOP measured by RBT was 14.13 ± 2.94 mmHg without SCL and 13.84 ± 2.75 mmHg with SCL. No significant statistical differences were found between IOP measured with and without SCL (p=0.47, p=0.11 respectively).

Conclusions

Reliable measurement of IOP by NCT and RBT can be achieved through plano SCL.

Keywords: Intraocular pressure, Noncontact tonometer, Rebound tonometer, Soft contact lens

Figures and Tables

Figure 1
Scatter plots showing intraocular pressure measurements with and without contact lens. There are reasonably good linear correlation between the two measurements. Solid line indicates regression line. (A) Noncontact tonometer, (B) Rebound tonometer.
jkos-53-662-g001
Figure 2
Bland & Altman plots showing intraocular pressure measurements with and without contact lens. Most of the dots are within ± 1.96 standard deviation (dashed line) of difference. Solid line indicates the average mean difference, dashed lines delineates the 98% confidence limits of agreement. (A) Noncontact tonometer, (B) Rebound tonometer.
jkos-53-662-g002
Table 1
Demographic characteristics of study subjects
jkos-53-662-i001

Values are presented as number or mean ± SD.

SE = spherical equivalent; SD = standard deviation; CCT = central corneal thickness; IOP = intraocular pressure by rebound tonometer.

Table 2
Summary of intraocular pressure measurements and difference between two methods
jkos-53-662-i002

Values are presented as mean ± SD.

IOP = intraocular pressure; SD = standard deviation; CL = contact lens; CI = confidence interval; NCT = noncontact tonometer; RBT = rebound tonometer.

*Paired t test.

References

1. Leske MC, Heijl A, Hussein M, et al. Factors for glaucoma progression and the effect of treatment: the early manifest glaucoma trial. Arch Ophthalmol. 2003. 121:48–56.
2. Morrison JC, Moore CG, Deppmeier LM, et al. A rat model of chronic pressure-induced optic nerve damage. Exp Eye Res. 1997. 64:85–96.
3. Henkind P, Walsh JB, Berger AW. Physicians' Desk Reference for Ophthalmology. 1986. 14th ed. Oradell, NJ: Medical Economics Company;102.
4. Lee S, Kim M. Intraocular pressure difference with and without soft contact lenses by noncontact tonometry. J Korean Ophthalmol Soc. 1990. 31:415–418.
5. Panek WC, Boothe WA, Lee DA, et al. Intraocular pressure measurement with the Tono-Pen through soft contact lenses. Am J Ophthalmol. 1990. 109:62–65.
6. Zeri F, Lupelli L, Formichella P, et al. Goldmann applanation tonometry over daily disposable contact lens: accuracy and safety of procedure. Cont Lens Anterior Eye. 2007. 30:233–238.
7. Patel S, Illahi W. Non-contact tonometry over soft contact lenses: effect of contact lens power on the measurement of intra-ocular pressure. Cont Lens Anterior Eye. 2004. 27:33–37.
8. Patel S, Stevenson G. Influence of lens material and intra-ocular pressure on the outcome of non-contact tonometry over soft contact lenses. Cont Lens Anterior Eye. 2009. 32:68–72.
9. Liu YC, Huang JY, Wang IJ, et al. Intraocular pressure measurement with the noncontact tonometer through soft contact lenses. J Glaucoma. 2011. 20:179–182.
10. McMonnies CW. Noncontact tonometry through soft contact lenses. Am J Optom Physiol Opt. 1986. 63:948–951.
11. Sugimoto-Takeuchi R, Yamamoto R, Kuwayama Y, Kinoshita S. Effect of intraocular pressure measurement through therapeutic soft contact lenses by noncontact tonometer. Nihon Ganka Gakkai Zasshi. 1991. 95:869–872.
12. Insler MS, Robbins RG. Intraocular pressure by noncontact tonometry with and without soft contact lenses. Arch Ophthalmol. 1987. 105:1358–1359.
13. Scibilia GD, Ehlers WH, Donshik PC. The effects of therapeutic contact lenses on intraocular pressure measurement. CLAO J. 1996. 22:262–265.
14. Allen RJ, Dev Borman A, Saleh GM. Applanation tonometry in silicone hydrogel contact lens wearers. Cont Lens Anterior Eye. 2007. 30:267–269.
15. Ehlers N, Hansen FK, Aasved H. Biometric correlations of corneal thickness. Acta Ophthalmol (Copenh). 1975. 53:652–659.
16. Martinez-de-la-Casa JM, Garcia-Feijoo J, Vico E, et al. Effect of corneal thickness on dynamic contour, rebound, and goldmann tonometry. Ophthalmology. 2006. 113:2156–2162.
17. Domke N, Hager A, Wiegand W. [Intraocular pressure and corneal thickness. A comparison between non-contact tonometry and applanation tonometry]. Ophthalmologe. 2006. 103:583–587.
18. Martinez-de-la-Casa JM, Jimenez-Santos M, Saenz-Frances F, et al. Performance of the rebound, noncontact and Goldmann applanation tonometers in routine clinical practice. Acta Ophthalmol. 2011. 89:676–680.
19. Nakamura M, Darhad U, Tatsumi Y, et al. Agreement of rebound tonometer in measuring intraocular pressure with three types of applanation tonometers. Am J Ophthalmol. 2006. 142:332–334.
20. Kageyama M, Hirooka K, Baba T, Shiraga F. Comparison of ICare rebound tonometer with noncontact tonometer in healthy children. J Glaucoma. 2011. 20:63–66.
TOOLS
Similar articles