Evaluation of Anterior Chamber Depth and Anterior Chamber Angle Changing After Phacoemulsification in the Primary Angle Close Suspect Eyes

Abstract

BACKGROUND: Phacoemulsification surgery has the ability to deeply alter the segment anterior morphology, especially in eye with shallow anterior chamber (AC), narrow anterior chamber angle (ACA). However, the changes of anterior chamber depth (ACD) and ACA on the close angle suspect eyes after phacoemulsification have not been mentioned in many studies. So, we conduct this research.
 AIM: To evaluate the alteration in the ACA and ACD after phacoemulsification in the close angle suspect eyes.
 METHODS: Interventional study with no control group. Subjects were the primary angle closure suspect (PACS) eyes, that were operated by phacoemulsification with intraocular lens (IOL) at Glaucoma Department of VNIO from December 2017 to October 2018.
 RESULTS: 29 PACS eyes with cataract were operated by phacoemulsification with intraocular lens. After 3 months of monitoring, the average ACD augmented from 2.082 ± 0.244 to 3.673 ± 0.222 mm. AOD500 increase from 0.183 ± 0.088 to 0.388 ± 0.132 μm, AOD750 increased from 0.278 ± 0.105 to 0.576 ± 0.149 μm. The TISA500 enlarged from 0.068 ± 0.033 to 0.140 ± 0.052 mm2, TISA750 enlarged from 0.125 ± 0.052 to 0.256 ± 0.089 mm2 at the third month (p < 0.01).
 CONCLUSION: Phacoemulsification surgery increases the ACD and enlarged the angle in the PACS eyes.

The change of anterior chamber angle parameters after cataract surgery in diabetic patients

“… 24 Another study demonstrated approximately 2 times increases in ACA indicators, including AOD-500, AOD-750, TISA-500, and TISA-750 following cataract surgery. 25 This was similar to the results of another study, concluding the change of the ACA parameters after cataract extraction of the patients with angle-closure glaucoma. 26 Similarly, our results represented an increasing tendency in ACA measurements following phacoemulsification procedure in both diabetic and nondiabetic patients.…”

The Effect of Capsulorhexis Size On Changes In The Anterior Chamber Depth And Iridocorneal Angle In Post Phacoemulsification Patient With Intraocular Lens Implantation

“…The iridocorneal angle is an important component in determining the diagnosis of glaucoma (Rufer, 2010). In postoperative patients, widening of the iridocorneal angle and decreased intraocular pressure are conditions that are often encountered both in patients with glaucoma disorders and in patients with normal eye conditions (Altan, 2004) implants whose thickness is thinner, the iris will be located further back which will then widen the anterior chamber and the irido-corneal angle (Vu et al, 2019). Another study reported that the preoperative convex iris shape changes to a flat shape after cataract extraction due to posterior movement of the iris with an increase in anterior chamber depth and also posterior displacement of the iris base after lens removal causes widening of the iridocorneal angle (Hussein et al, 2020).…”

Assessment of anterior chamber angle changes after phacoemulsification with swept-source OCT

“…However, due to the inspection characteristics of UBM and gonioscopy at early years, some more detailed parameters could not be investigated [19,[21][22]24] . Further studies have been carried out to explore the changes of the angle structure of the anterior chamber after phacoemulsification by AS-OCT [3,[6][7][10][11]26] . It has the advantage of allowing faster the anterior chamber cross-sectional imaging than UBM, without contacting with the eyeball.…”

“…Clear-lens extraction was more effective and cost-effective than LPI and should be an option for first-line treatment for primary angle-closure glaucoma (PACG). Current researches showed that cataract surgery with intraocular lens (IOL) implantation can deepen the anterior chamber and increase the width of the anterior chamber angles [2][3][4][5][6][7] . The effect of cataract surgery on IOP in glaucoma patients has been reported in many studies of different subtypes of glaucoma.…”