Ragged morphology of proximal opening of CCI is the most important predictive factor for incision-site DMD. Femtosecond-laser CCIs have less incision-site DMD as compared to keratome-assisted CCIs. iOCT provides real-time assessment of CCI morphology and DMD.
ASOCT is a useful adjunct in monitoring fungal keratitis especially in cases with deep stromal involvement and endothelial plaques. In addition, it also provides insight into the activity of keratitis.
Purpose:
To evaluate morphological characteristics and intraoperative dynamics of different types of white cataract using intraoperative optical coherence tomography (iOCT).
Setting:
Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
Design:
Prospective interventional study.
Methods:
Fifty eyes with white cataract undergoing phacoemulsification were evaluated. The primary outcome measure was the classification of white cataract based on morphology and intraoperative dynamics on iOCT. The secondary outcome measure was rhexis-related complications.
Results:
Four types of white cataract were identified based on iOCT—type I (9 eyes), type II (3 eyes), type III (24 eyes), and type IV (14 eyes). Type I had regularly arranged lamellar cortical fibers, type II had continuous hyperreflective bands of cortical fibers with intralenticular clefts, type III had intralenticular clefts combined with areas of homogenous ground-glass appearance, and type IV had homogenous ground-glass appearance of the anterior lens cortex. Capsulorhexis in type I cataract was uneventful. In type II cataract, cortical bulge was observed in the anterior chamber on creating the initial nick, indicating raised intralenticular pressure (ILP) with an imminent risk of rhexis extension. A bimanual irrigation/aspiration was performed until lowering of ILP was observed on iOCT. In types III and IV, fluid release was observed on initiation of rhexis leading to partial (type III) or complete (type IV) lowering of ILP, with a mild-moderate risk of capsulorhexis extension. A continuous curvilinear capsulorhexis was achieved in all cases, with no case of posterior capsular tear or vitreous loss.
Conclusions:
Intraoperative OCT helped elucidate intraoperative dynamics of the spectrum of white cataracts and facilitates completion of capsulorhexis.
Purpose:
To evaluate morphological characteristics and intraoperative dynamics of posterior polar cataract (PPC) using intraoperative optical coherence tomography (iOCT).
Setting:
Rajendra Prasad Center for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
Design:
Prospective interventional study.
Methods:
Forty eyes with PPC undergoing phacoemulsification were evaluated. Primary outcome measure was morphology of PPC and intraoperative dynamics of posterior capsule (PC). Secondary outcome measure was PC rent, which was retrospectively compared with 72 PPC cases that underwent non–iOCT-guided surgery.
Results:
Of the 40 eyes evaluated, 3 morphological variants of PPC were observed: type I (19/40 [47.5%]) characterized by intact PC and clearance between PC and opacity, type II (12/40 [30%]) with intact PC in periphery of opacity, shadowing, and inability to detect PC in the center, and type III (9/40 [22.5%]) with dense opacity, extensive shadowing, and inability to delineate PC. In addition to hydrodelineation, hydrodissection was performed in all cases of type I PPC. In types II and III PPC, only hydrodelineation was performed. No case with type I opacity developed PC dehiscence. Three cases (7.5%) with types II (1 eye) and III (2 eyes) PPC developed PC dehiscence during aspiration of epinuclear cushion. Intraocular lens was implanted in all cases in the bag or sulcus. There was no significant difference in PC dehiscence between iOCT-guided and non–iOCT-guided surgery (P = .7).
Conclusions:
iOCT-guided surgery helps to elucidate intraoperative dynamics in PPC and assess real-time PC integrity. It characterizes high-risk morphological features, enables safe hydrodissection in a subset of PPC, but does not decrease the incidence of PC dehiscence.
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