No abstract available.
Ultrasonics*

No abstract available.
Ultrasonics

No abstract available.
Ultrasonics*

No abstract available.
Ultrasonics

Ultrasonic pachymetry was carried out in 300 eyes of normal, myopic, and senile cataract patients with Alcon Surgical Pachymeter. The mean central corneal thickness was 0.527mm+/- 0.034mm. Corneal thickness wa significantly correlated with age, axial length, and sex. No statistical correlation was found between corneal thickness and the right or left eyes, corneal curvature, and ocular tention (within normal range). Pachymetric results were consistent if a good applanation of the probe occurred. Thus, reliable data could only be obtained by skilled user.
Ultrasonics ; Eye

No abstract available.
Lipectomy* ; Ultrasonics*

No abstract available.
Osteotomy ; Ultrasonics

It is well documented that increased corneal thickness leads to artificially high estimations of intraocular pressure(IOP) measured with applanation tonometer. To evaluate the influence of central corneal thickness on IOPs measured with non-contact tonometer and Goldmann applanation tonometer and on the IOP discrepancies between two tonometer according to corneal thickness, the IOPs and central corneal thickness of 96 eyes of 48 persons who visited to have their high IOPs evaluated were measured with Goldmann applanation tonometer, non-contact tonometr(CT-50, Topcon, Japan), and corneal pachometer(Humphrey ultrasonic pachometer-850). IOPs measured with each tonometer showed statistically significant linear correlation(p<0.001), IOP rises as the corneal thickness increases(p<0.001), IOPs measured with non-contact tonometer were higher than those measured with Goldmann applanation tonometer(p<0.001), but there were no significant differences between the IOP discrepancies of each tonometer according to corneal thickness, and between the IOP and age in a consistant corneal thickness(p>0.1). In conclusion, the central corneal thickness must be considered in estimating IOP and the IOP differences measured with Goldmann applanation tonometer and non-contact tonometer were not statistifically significantly increased as the corneal thickness increased.
Humans ; Intraocular Pressure* ; Ultrasonics

No abstract available.
Albuterol* ; Humans ; Infant* ; Ultrasonics*

PURPOSE:We compared the measurements of corneal thickness and anterior chamber depth (ACD) using three different methods Orbscan, Pentacam and ultrasound pachymetry. METHODS: In healthy volunteers, central corneal thickness was measured with Orbscan, Pentacam and ultrasound pachymetry. Estimation of peripheral corneal thickness and ACD were done by Orbscan and Pentacam. All results were compared statistically. RESULTS: The mean central corneal thickness of 64 eyes measured by Orbscan, Pentacam and ultrasound pachymetry were 509.1+/-61.0 microm, 539.2+/-51.7 microm and 527.4+/-48.3 microm, respectively. There were statistically significant differences in the results among the three methods (repeated-measures analysis of variance (ANOVA), p<0.05). There were significant correlations between the ultrasonic pachymetry, the Orbscan and the Pentacam (Pearson correlation, r>0.90, p<0.05). The temporal and nasal peripheral corneal thicknesses were thinner in the Pentacam than in the Orbscan (paired t-test, p<0.05). The superior and inferior corneal thickness and ACD were not significantly different. CONCLUSIONS: The results of the three instruments have significant correlations with each other, so all methods are clinically useful.
Anterior Chamber ; Eye ; Ultrasonics