We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Decrease in intraocular pressure following orthokeratology measured with a noncontact tonometer.
- Authors
Ishida, Yasuhito; Yanai, Ryoji; Sagara, Takeshi; Nishida, Teruo; Toshida, Hiroshi; Murakami, Akira
- Abstract
Purpose: Orthokeratology for correction of myopia reduces corneal power by flattening corneal curvature and thinning central corneal thickness (CCT). Measurement of intraocular pressure (IOP) with a noncontact tonometer is known to be affected by CCT and corneal curvature. We investigated the influence of orthokeratology on such measurements of IOP. Methods: This was a prospective, interventional case series derived from a clinical trial of orthokeratology lenses in two hospitals. Both eyes of 45 subjects were fitted with reverse-geometry lenses, worn for more than 4 h overnight for 52 weeks. Uncorrected visual acuity, refraction, IOP (with a noncontact tonometer), CCT, and corneal curvature were measured. Results: Uncorrected visual acuity, spherical equivalent value, IOP, CCT, and the radius of corneal curvature were 0.93 ± 0.27, −2.87 ± 1.05 D, 13.5 ± 2.5 mmHg, 536.2 ± 39.6 μm, and 7.88 ± 0.25 mm, respectively, before orthokeratology, and 0.17 ± 0.34, −1.05 ± 1.18 D, 12.4 ± 2.7 mmHg, 528.6 ± 40.8 μm, and 8.10 ± 0.31 mm at 52 weeks after treatment. The changes in all parameters were significant, and the change in IOP was significantly correlated with that in CCT at 24 weeks and thereafter. Conclusions: Orthokeratology for myopia leads to a decrease in IOP measured with a noncontact tonometer, likely as a result of the associated decrease in CCT.
- Subjects
ORTHOKERATOLOGY; MYOPIA treatment; CORNEA; INTRAOCULAR pressure; TONOMETERS; CLINICAL trials
- Publication
Japanese Journal of Ophthalmology, 2011, Vol 55, Issue 3, p190
- ISSN
0021-5155
- Publication type
Article
- DOI
10.1007/s10384-011-0018-2