Evaluation of anterior segment parameter changes using the Pentacam after uneventful phacoemulsification

Abstract

ABSTRACT.Purpose: This study set out to evaluate the influences of uneventful phacoemulsification on the anterior segment parameters obtained with the Pentacam rotating Scheimpflug camera and intraocular pressure (IOP). Methods: A total of 42 eyes of 34 patients (26 men, eight women) were evaluated preoperatively, and at 1, 3 and 6 months postoperatively with the Pentacam. Intraocular pressure was measured with the Goldmann applanation tonometer. The non-parametric paired t-test was used to compare preoperative and 1-, 3-and 6-month postoperative measurements of anterior chamber depth (ACD), anterior chamber volume (ACV), anterior chamber angle (ACA) width, central corneal thickness (CCT), the central 3-, 5-and 7-mm corneal volume (CV), pupil size, and IOP. Pearson's correlation test was used to evaluate the relationships between IOP and ACD, ACV and ACA width. Results: The differences between ACD, ACV, ACA and IOP values taken preoperatively and those taken postoperatively at 1, 3 and 6 months were statistically significant (p < 0.05). The differences between CCT, central 3-, 5-and 7-mm CV, and pupil size measurements taken preoperatively and those taken postoperatively at 1, 3 and 6 months were not statistically significant (p > 0.05). The decrease in IOP was not correlated with the changes in ACD, ACV and ACA (p > 0.05). Conclusions: Uneventful phacoemulsification significantly reduced IOP, increased ACD and ACV, and widened the ACA. However, alterations in CV, CCT and pupil size values were not statistically significant. Alterations in ACD, ACV, ACA and IOP remain stable after the first month of surgery.

Comparing Anterior Segment Ocular Coherence Tomography (AS-OCT), Ultrasound Biomicroscopy (UBM) and Pentacam in Evaluating the Changes of the Anterior Segment Parameters after Phacoemulsification

“…However, this was different to what was stated by Doganay et al [23], who found no difference between preoperative and postoperative CCT. They found the mean CCT measurements were 534 ± 34 µm preoperatively and 528 ± 35 µm, 528 ± 36 µm and 538 ± 37 µm at 1, 3 and 6 months postoperatively, respectively.…”

“…In their study, before surgery, the mean anterior chamber angle widths were 23.21 ± 6.70° in the nasal quadrant and 24.89 ± 7.66° in the temporal quadrant which increased significantly to 35.16 ± 4.65° in the nasal quadrant (p=0.001) and 36.03 ± 4.86° in the temporal quadrant (p=0.001). Also, Doganay et al [23], found the mean anterior chamber angle (ACA) measurements were 33 ± 6° preoperatively changed to 42 ± 7°, 44 ± 7° and 43 ± 6° at 1, 3 and 6 months postoperatively, respectively. The differences between pre and postoperative ACA measurements were statistically significant (p<0.05).…”

“…They studied Forty-five eyes underwent AS-OCT imaging in order to evaluate anterior chamber configuration before and 2 days after phacoemulsification and IOL implantation and found that the postoperative central ACD increased to 4.14 ± 0.31 mm (p<0.001). Doganay et al [23] studied the AC depth in 42 eyes which were evaluated preoperatively, and at 1, 3 and 6 months after cataract surgery using the Pentacam. The mean preoperative ACD measurements were 2.79 ± 0.42 mm which increased significantly to 4.41 ± 0.45 mm, 4.63± 0.57 mm and 4.65 ± 0.32 mm at 1, 3 and 6 months postoperatively, respectively (p<0.05).…”

The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

“…The measurements of ACD did not change significantly at the 1-3-and 6-month examinations postoperatively, which was in accordance with that has been reported by Doganay et al 13 That means the values of anterior chamber depth remained stable after one month of phacoemulsification. There were no significant changes of corneal curvature measurements by pentacam preoperatively and over the 6 months postoperatively.…”

Intra-session repeatability of iridocorneal angle measurements provided by a Scheimpflug photography-based system in healthy eyes

“…This measurement provides essential information about the angle anatomy necessary to diagnose the type of glaucoma and to assess the risk for developing angle-closure glaucoma [1]. Likewise, IA is also a parameter to consider when planning refractive surgery with implantation of an angle-supported phakic intraocular lens [2].…”