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Evaluation of anterior segment changes following phacoemulsification using Pentacam imaging and anterior segment ocular coherence tomography (AS-OCT) in eyes with narrow angles

Poster Details

First Author: M.Elbasty EGYPT

Co Author(s):    A. Elkateb   M. Metwally   S. Hasan        

Abstract Details



Purpose:

To quantitatively assess effect of cataract extraction on anterior segment of the eye using imaging modalities as Pentacam and AS- OCT before and after phacoemulsification and intraocular lens implantation in patients with potential risk angle closure ( angle closure suspects )

Setting:

Kasr eleini hospital, Cairo university, Cairo, Egypt

Methods:

Interventional prospective non-randomized study. The study enrolled 40 eyes. All patients recruited had non-complicated cataract with occludable angles (grade I, II using Shaffer grading system) in at least three quadrants. All patients completed an ophthalmologic examination including best-corrected visual acuity and manifest reỲfraction, slit-lamp biomicroscopy, Goldmann applanation tonometry, gonioscopy, and indirect ophthalmoscopy. AS-OCT (Optovue Inc., Fremont, CA, USA, software version 6,7,2,94) and Scheimpflug (Pentacam, Oculus Inc., software version 1.11) were used preoperative and three months postoperative.

Results:

Parameters obtained by Pentacam showed the following: The mean increase in anterior chamber volume (ACV) was 55.64 +/- 18.47 mm3. The mean increase in internal anterior chamber depth (ACD) was 2.06 +/- 0.37 mm. There was a significant correlation (p < 0.001) between ACD calculated using pentacam before surgery and Gonioscopic grading for both temporal, and nasal quadrants. Parameters measured by AS-OCT before and 3 months after surgery showed statistically significant increase in all parameters including angles in degrees with mean increase of 21.3 +/- 3.6 for nasal quadrant and 22.08 +/- 4.5 for temporal quadrant , angle opening distance 500 (AOD500) showed mean increase of 272 +/- 47 um for nasal and 279 +/- 65 um for temporal, and trabecular iris space area 500(TISA500) also showed mean increase of 0.058 +/- 0.093 mm2 for nasal and 0.083 +/- 0.023 mm2 for temporal quadrant. Preoperative nasal ACA, AOD500 and TISA500 using AS-OCT showed significant correlation with nasal gonioscopic grading. There was also significant correlation between temporal ACA, AOD500, TISA500 and temporal Gonioscopic grading.

Conclusions:

Lens extraction is considered an effective treatment option for patients with angle closure suspects.

Financial Disclosure:

NONE

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