Corneal Topography and Contact Lenses

Twa, Michael D.; Coral-Ghanem, Cleusa; Barth, Breno

doi:10.1007/0-387-21758-4_6

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…In recent years, techniques on assessing anterior segment have rapidly evolved, with new devices based on Scheimpflug imaging such as Pentacam HR Mehravaran, 2007, 2010) (Hashemi and Mehravaran, 2007;Hashemi and Mehravaran, 2010) Ghanem and Barth, 2003;Barkana et al, 2005;Huynh et al, 2006;Shirayama et al, 2009;Sheppard and Davies, 2010;Salouti et al, 2010;Bandyopadhyay et al, 2010;Nakakura et al, 2012;Bueno-Gimeno et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Corneal Curvature Measurements Utilizing a New Swept-source Optical Coherence Tomography Tomey OA-2000® and Comparison With IOL Master® 500 in Pterygium Patients

Hilmi

Kamal²,

Azemin³

et al. 2018

Sains Med. J. Kedokt. dan Kesehat.

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Introduction: Corneal curvature (CC) is an important anterior segment parameter. This study compared CC measurements conducted with two optical devices in pterygium eyes.Methods: Sixty pterygium eyes of 30 patients were enrolled in this study. CC was measured three times with the optical biometer and topography-keratometer Tomey OA-2000 (Tomey Corporation, Nagoya, Japan), then with partial optical coherence interferometry (PCI) IOL Master 500 (Carl Zeiss Meditec, Dublin, CA) and data were statistically analysed.Results: The measurements revealed in a mean CC of 43.86 ± 1.57 D with Tomey OA-2000 and 43.84 ± 1.55 D with IOL Master. Distribution of data is normal, and no significance difference in CC values was detected (P = 0.952) between the two devices. Correlation between CC measurements was highly significant (r = 0. 99; P < 0.0001). The mean difference of CC values between devices was 0.017 D and 95% limit of agreement was -0.088 to 0.12. Duration taken for measurements with the standard biometer IOL Master was longer (55.17 ± 2.24 seconds) than with Tomey OA-2000 (39.88 ± 2.38 seconds) in automatic mode. Duration of manual measurement with Tomey OA-2000 in manual mode was shorter (28.57 ± 2.71 seconds).Conclusion: In pterygium eyes, CC measured with Tomey OA-2000 and IOL Master showed similar values, and high correlation was observed between these two devices. This shows that both devices can be used interchangeably. Tomey OA-2000 is better in terms of faster to operate and has its own topography systems.

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Section: Discussionmentioning

confidence: 99%

Corneal Curvature Measurements Utilizing a New Swept-source Optical Coherence Tomography Tomey OA-2000® and Comparison With IOL Master® 500 in Pterygium Patients

Hilmi

Kamal²,

Azemin³

et al. 2018

Sains Med. J. Kedokt. dan Kesehat.

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“…When examined with a hand-held keratoscope, keratoconus appears as an inferior or inferotemporal deviation of the horizontal axis and compression of mires 2. Videokeratoscopy allows quantitative assessment of the corneal curvature several topographic criteria that can be used for the diagnosis of keratoconus 3. Data generated from advanced computerized systems, however, is not limited to keratometry readings, and various aspects of corneal shape can be examined such as curvature, elevation, and thickness.…”

Section: Introductionmentioning

confidence: 99%

“…2 Videokeratoscopy allows quantitative assessment of the corneal curvature several topographic criteria that can be used for the diagnosis of keratoconus. 3 Data generated from advanced computerized systems, however, is not limited to keratometry readings, and various aspects of corneal shape can be examined such as curvature, elevation, and thickness. Two popular examples of such topography systems are the Orbscan (Bausch and Lomb Inc., Rochester, NY, USA) and the Pentacam (Oculus GmBH, Wetzlar, Germany) both of which have a variety of applications.…”

Section: Introductionmentioning

confidence: 99%